Prometheus: remote read endpoint allows denial of service via crafted snappy payload
cve-program · CVE-2026-42154
PublishedPrometheus is an open-source monitoring system and time series database. Prior to versions 3.5.3 and 3.11.3, the remote read endpoint (/api/v1/read) does not validate the declared decoded length in a snappy-compressed request body before allocating memory. An unauthenticated attacker can send a small payload that causes a huge heap allocation per request. Under concurrent load this can exhaust available memory and crash the Prometheus process. This issue has been patched in versions 3.5.3 and 3.11.3.
Read the publisher's advisoryeuvd · EUVD-2026-27091
PublishedPrometheus is an open-source monitoring system and time series database. Prior to versions 3.5.3 and 3.11.3, the remote read endpoint (/api/v1/read) does not validate the declared decoded length in a snappy-compressed request body before allocating memory. An unauthenticated attacker can send a small payload that causes a huge heap allocation per request. Under concurrent load this can exhaust available memory and crash the Prometheus process. This issue has been patched in versions 3.5.3 and 3.11.3.
Read the publisher's advisorynvd · CVE-2026-42154
PublishedPrometheus is an open-source monitoring system and time series database. Prior to versions 3.5.3 and 3.11.3, the remote read endpoint (/api/v1/read) does not validate the declared decoded length in a snappy-compressed request body before allocating memory. An unauthenticated attacker can send a small payload that causes a huge heap allocation per request. Under concurrent load this can exhaust available memory and crash the Prometheus process. This issue has been patched in versions 3.5.3 and 3.11.3.
Read the publisher's advisoryosv · GHSA-8rm2-7qqf-34qm
Published### Impact The remote read endpoint (`/api/v1/read`) does not validate the declared decoded length in a snappy-compressed request body before allocating memory. An unauthenticated attacker can send a small payload that causes a huge heap allocation per request. Under concurrent load this can exhaust available memory and crash the Prometheus process. ### Patches _Has the problem been patched? What versions should users upgrade to?_ Fixed in 3.11.3 and 3.5.3 LTS. Users should upgrade to these versions or later. ### Workarounds User who can not upgrade can place Prometheus behind a reverse proxy or firewall that requires authentication before requests reach /api/v1/read.
Read the publisher's advisoryosv · GO-2026-5264
PublishedPrometheus: Remote read endpoint allows denial of service via crafted snappy payload in github.com/prometheus/prometheus
Read the publisher's advisoryAffected versions, risk and source history
Exploitation and risk
Source statusCISA KEV lists vulnerabilities known to be exploited. FIRST EPSS estimates the likelihood of exploitation in the next 30 days. An unavailable score does not mean zero risk.
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No exploitation or prediction data is available here for these CVEs. This does not mean they are safe or unlikely to be exploited.
cve-program · CVE-2026-42154
PublishedPrometheus: remote read endpoint allows denial of service via crafted snappy payload
Prometheus is an open-source monitoring system and time series database. Prior to versions 3.5.3 and 3.11.3, the remote read endpoint (/api/v1/read) does not validate the declared decoded length in a snappy-compressed request body before allocating memory. An unauthenticated attacker can send a small payload that causes a huge heap allocation per request. Under concurrent load this can exhaust available memory and crash the Prometheus process. This issue has been patched in versions 3.5.3 and 3.11.3.
- Source published
- 4 May 2026 18:13:12 UTC
- Source modified
- 10 Sep 2026 12:04:54 UTC
- Saved here
- 23 Oct 2026 15:48:27 UTC
- Source terms
- CVE Program Terms of Use
Original source record · Cite this exact observation · Complete original publisher JSON
Source: cve-program · CVE Program Terms of Use. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.
CVSS 3.1 · 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
euvd · EUVD-2026-27091
PublishedPrometheus is an open-source monitoring system and time series database. Prior to versions 3.5.3 and 3.11.3, the remote read endpoint (/api/v1/read) does not validate the declared decoded length in a snappy-compressed request body before al…
Prometheus is an open-source monitoring system and time series database. Prior to versions 3.5.3 and 3.11.3, the remote read endpoint (/api/v1/read) does not validate the declared decoded length in a snappy-compressed request body before allocating memory. An unauthenticated attacker can send a small payload that causes a huge heap allocation per request. Under concurrent load this can exhaust available memory and crash the Prometheus process. This issue has been patched in versions 3.5.3 and 3.11.3.
Additional publisher context
EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.
Original publisher date fields
datePublished: May 4, 2026, 6:13:12 PM
dateUpdated: Sep 10, 2026, 12:04:54 PM
59 related source bulletins · separate from aliases
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RHSA-2026:42796: Red Hat Security Advisory: Red Hat Quay 3.15.6
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CVE-2026-27136 · CVE-2026-41178 · CVE-2026-42151 · CVE-2026-42154 · CVE-2026-42502 · CVE-2026-48586 · CVE-2026-55969 · CVE-2026-56852 · CVE-2026-66780 · CVE-2026-71556 · CVE-2026-73646
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RHSA-2026:50843: Red Hat Security Advisory: Logging for Red Hat OpenShift - 6.0.16
CVE-2026-25681 · CVE-2026-27136 · CVE-2026-33186 · CVE-2026-33811 · CVE-2026-39820 · CVE-2026-39821 · CVE-2026-42151 · CVE-2026-42154 · CVE-2026-42499 · CVE-2026-42504
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CVE-2022-21698 · CVE-2026-25680 · CVE-2026-25681 · CVE-2026-27136 · CVE-2026-28374 · CVE-2026-28376 · CVE-2026-28379 · CVE-2026-28380 · CVE-2026-28383 · CVE-2026-33376 · CVE-2026-33377 · CVE-2026-33378 · CVE-2026-33380 · CVE-2026-33381 · CVE-2026-34986 · CVE-2026-39821 · CVE-2026-40179 · CVE-2026-41602 · CVE-2026-42151 · CVE-2026-42154 · CVE-2026-42502 · CVE-2026-42506
RHSA-2026:56340: Red Hat Security Advisory: Logging for Red Hat OpenShift - 6.5.2
CVE-2026-25681 · CVE-2026-27136 · CVE-2026-32281 · CVE-2026-32282 · CVE-2026-33811 · CVE-2026-33813 · CVE-2026-39820 · CVE-2026-39821 · CVE-2026-42151 · CVE-2026-42154 · CVE-2026-42499 · CVE-2026-42502 · CVE-2026-42504 · CVE-2026-56852
RHSA-2026:47149: Red Hat Security Advisory: Multicluster Global Hub 1.7.2 security update
CVE-2026-27145 · CVE-2026-33376 · CVE-2026-33377 · CVE-2026-33811 · CVE-2026-39821 · CVE-2026-42151 · CVE-2026-42154 · CVE-2026-43870 · CVE-2026-46384 · CVE-2026-46385 · CVE-2026-53488 · CVE-2026-53492 · CVE-2026-55677
openSUSE-SU-2026:10676-1: golang-github-prometheus-prometheus-3.11.3-1.1 on GA media
CVE-2026-42151 · CVE-2026-42154
RHSA-2026:40945: Red Hat Security Advisory: Red Hat Edge Manager Version 1.1.3 Security Update
CVE-2025-13465 · CVE-2025-61729 · CVE-2025-68121 · CVE-2025-69873 · CVE-2026-4800 · CVE-2026-4926 · CVE-2026-6322 · CVE-2026-13676 · CVE-2026-22029 · CVE-2026-25679 · CVE-2026-29063 · CVE-2026-32141 · CVE-2026-32280 · CVE-2026-32281 · CVE-2026-32282 · CVE-2026-33186 · CVE-2026-33810 · CVE-2026-33811 · CVE-2026-33816 · CVE-2026-39821 · CVE-2026-39828 · CVE-2026-39829 · CVE-2026-39830 · CVE-2026-39832 · CVE-2026-39835 · CVE-2026-42151 · CVE-2026-42154 · CVE-2026-42508 · CVE-2026-46595
RHSA-2026:41066: Red Hat Security Advisory: Red Hat Quay 3.16.5
CVE-2026-6322 · CVE-2026-9277 · CVE-2026-10143 · CVE-2026-12143 · CVE-2026-13676 · CVE-2026-32281 · CVE-2026-32591 · CVE-2026-39820 · CVE-2026-39821 · CVE-2026-39828 · CVE-2026-39829 · CVE-2026-39830 · CVE-2026-39831 · CVE-2026-39832 · CVE-2026-39835 · CVE-2026-42044 · CVE-2026-42151 · CVE-2026-42154 · CVE-2026-42499 · CVE-2026-42504 · CVE-2026-42508 · CVE-2026-44432 · CVE-2026-44486 · CVE-2026-44487 · CVE-2026-44488 · CVE-2026-44492 · CVE-2026-44494 · CVE-2026-44495 · CVE-2026-44496 · CVE-2026-44990 · CVE-2026-45822 · CVE-2026-46597 · CVE-2026-48526
RHSA-2026:47728: Red Hat Security Advisory: OpenShift Container Platform 4.17.56 bug fix and security update
CVE-2026-9697 · CVE-2026-12151 · CVE-2026-13676 · CVE-2026-16242 · CVE-2026-26996 · CVE-2026-33186 · CVE-2026-35469 · CVE-2026-40895 · CVE-2026-42154 · CVE-2026-46579
RHSA-2026:48699: Red Hat Security Advisory: OpenShift Container Platform 4.18.51 bug fix and security update
CVE-2026-4800 · CVE-2026-9277 · CVE-2026-16242 · CVE-2026-33186 · CVE-2026-40895 · CVE-2026-42154
RHSA-2026:29770: Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
CVE-2026-42154 · CVE-2026-42211 · CVE-2026-47262
RHSA-2026:53415: Red Hat Security Advisory: opentelemetry-collector security update
CVE-2026-25681 · CVE-2026-27136 · CVE-2026-27145 · CVE-2026-33811 · CVE-2026-39821 · CVE-2026-42151 · CVE-2026-42154 · CVE-2026-43870
RHSA-2026:40972: Red Hat Security Advisory: RHTAS 1.3.6 - Red Hat Trusted Artifact Signer Release
CVE-2026-39828 · CVE-2026-39829 · CVE-2026-39830 · CVE-2026-39831 · CVE-2026-39832 · CVE-2026-39835 · CVE-2026-42151 · CVE-2026-42154 · CVE-2026-44740 · CVE-2026-46597
msrc_CVE-2026-42154: Prometheus: remote read endpoint allows denial of service via crafted snappy payload
CVE-2026-42154
RHSA-2026:50758: Red Hat Security Advisory: OpenShift Container Platform 4.16.68 bug fix and security update
CVE-2026-13676 · CVE-2026-16242 · CVE-2026-33186 · CVE-2026-42154 · CVE-2026-49332
RHSA-2026:70267: Red Hat Security Advisory: Red Hat Quay 3.14.9
CVE-2026-4427 · CVE-2026-6322 · CVE-2026-9277 · CVE-2026-10143 · CVE-2026-12143 · CVE-2026-13149 · CVE-2026-13676 · CVE-2026-14257 · CVE-2026-15792 · CVE-2026-15927 · CVE-2026-16221 · CVE-2026-18255 · CVE-2026-32591 · CVE-2026-33747 · CVE-2026-33748 · CVE-2026-33818 · CVE-2026-39820 · CVE-2026-39821 · CVE-2026-39822 · CVE-2026-39828 · CVE-2026-39829 · CVE-2026-39830 · CVE-2026-39831 · CVE-2026-39832 · CVE-2026-39835 · CVE-2026-42151 · CVE-2026-42154 · CVE-2026-42499 · CVE-2026-42504 · CVE-2026-42508 · CVE-2026-44432 · CVE-2026-44486 · CVE-2026-44487 · CVE-2026-44488 · CVE-2026-44492 · CVE-2026-44494 · CVE-2026-44495 · CVE-2026-44496 · CVE-2026-44705 · CVE-2026-44990 · CVE-2026-46595 · CVE-2026-46597 · CVE-2026-48526 · CVE-2026-49477 · CVE-2026-54058 · CVE-2026-54060 · CVE-2026-55379 · CVE-2026-55380 · CVE-2026-56852 · CVE-2026-56853 · CVE-2026-56858 · CVE-2026-56859 · CVE-2026-56860 · CVE-2026-56862 · CVE-2026-57231 · CVE-2026-59197 · CVE-2026-59199 · CVE-2026-59200 · CVE-2026-59204 · CVE-2026-59205 · CVE-2026-59869 · CVE-2026-59885 · CVE-2026-59886 · CVE-2026-67213 · CVE-2026-67214 · CVE-2026-67313 · CVE-2026-67314 · CVE-2026-67320 · CVE-2026-67321 · CVE-2026-69152 · CVE-2026-69153 · CVE-2026-73086 · CVE-2026-73088 · CVE-2026-73089 · CVE-2026-84375
WID-SEC-W-2026-3046: IBM Concert: Mehrere Schwachstellen
CVE-2019-19921 · CVE-2021-23337 · CVE-2024-3651 · CVE-2024-39338 · CVE-2024-45590 · CVE-2025-13465 · CVE-2025-15284 · CVE-2025-15599 · CVE-2025-22874 · CVE-2025-47273 · CVE-2025-47907 · CVE-2025-52881 · CVE-2025-53643 · CVE-2025-55184 · CVE-2025-58056 · CVE-2025-58188 · CVE-2025-58189 · CVE-2025-61723 · CVE-2025-61730 · CVE-2025-64649 · CVE-2025-64756 · CVE-2025-67221 · CVE-2025-68121 · CVE-2025-68146 · CVE-2026-0540 · CVE-2026-2327 · CVE-2026-23490 · CVE-2026-23897 · CVE-2026-2391 · CVE-2026-23949 · CVE-2026-24486 · CVE-2026-25528 · CVE-2026-25547 · CVE-2026-25639 · CVE-2026-25990 · CVE-2026-26007 · CVE-2026-26019 · CVE-2026-26996 · CVE-2026-27142 · CVE-2026-27212 · CVE-2026-27699 · CVE-2026-27903 · CVE-2026-27904 · CVE-2026-28684 · CVE-2026-29063 · CVE-2026-29181 · CVE-2026-2950 · CVE-2026-31808 · CVE-2026-31900 · CVE-2026-32274 · CVE-2026-32288 · CVE-2026-32597 · CVE-2026-32630 · CVE-2026-32887 · CVE-2026-32952 · CVE-2026-33186 · CVE-2026-33532 · CVE-2026-33750 · CVE-2026-33814 · CVE-2026-33816 · CVE-2026-33916 · CVE-2026-34043 · CVE-2026-34073 · CVE-2026-34077 · CVE-2026-3520 · CVE-2026-35469 · CVE-2026-35515 · CVE-2026-3627 · CVE-2026-39823 · CVE-2026-39825 · CVE-2026-39826 · CVE-2026-39892 · CVE-2026-39984 · CVE-2026-40175 · CVE-2026-40179 · CVE-2026-40181 · CVE-2026-40190 · CVE-2026-40347 · CVE-2026-41066 · CVE-2026-41182 · CVE-2026-41238 · CVE-2026-41239 · CVE-2026-41240 · CVE-2026-41305 · CVE-2026-41324 · CVE-2026-41425 · CVE-2026-41481 · CVE-2026-41488 · CVE-2026-41602 · CVE-2026-41636 · CVE-2026-42151 · CVE-2026-42154 · CVE-2026-42198 · CVE-2026-42211 · CVE-2026-42338 · CVE-2026-42342 · CVE-2026-42561 · CVE-2026-42577 · CVE-2026-43870 · CVE-2026-44405 · CVE-2026-44431 · CVE-2026-44432 · CVE-2026-44486 · CVE-2026-44487 · CVE-2026-44488 · CVE-2026-44492 · CVE-2026-44494 · CVE-2026-44496 · CVE-2026-44728 · CVE-2026-4539 · CVE-2026-45409 · CVE-2026-45736 · CVE-2026-46625 · CVE-2026-4800 · CVE-2026-4923 · CVE-2026-4926 · CVE-2026-7246 · CVE-2026-8723
RHSA-2026:34794: Red Hat Security Advisory: OpenShift Container Platform 4.22.4 bug fix and security update
CVE-2026-9595 · CVE-2026-33186 · CVE-2026-34986 · CVE-2026-35469 · CVE-2026-42154 · CVE-2026-44494
RHSA-2026:41030: Red Hat Security Advisory: Multicluster Global Hub 1.4.7 security update
CVE-2026-25681 · CVE-2026-27136 · CVE-2026-27145 · CVE-2026-33811 · CVE-2026-39821 · CVE-2026-41567 · CVE-2026-42151 · CVE-2026-42154 · CVE-2026-43870 · CVE-2026-46384 · CVE-2026-46385 · CVE-2026-53488 · CVE-2026-53492
RHSA-2026:56789: Red Hat Security Advisory: OpenShift Container Platform 4.14.72 bug fix and security update
CVE-2025-68121 · CVE-2026-4800 · CVE-2026-16242 · CVE-2026-26996 · CVE-2026-32280 · CVE-2026-33186 · CVE-2026-33811 · CVE-2026-39820 · CVE-2026-42154 · CVE-2026-42499 · CVE-2026-44496 · CVE-2026-50236 · CVE-2026-50237
- Source published
- May 4, 2026, 6:13:12 PM (timezone not stated)
- Source modified
- Sep 10, 2026, 12:04:54 PM (timezone not stated)
- Saved here
- 13 Nov 2026 12:02:10 UTC
- Source terms
- ENISA EUVD · source terms and attribution apply
Original source record · Cite this exact observation · Complete original publisher JSON
Source: euvd · ENISA EUVD · source terms and attribution apply. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.
EUVD CVSS 3.1 · 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvd · CVE-2026-42154
PublishedPrometheus is an open-source monitoring system and time series database. Prior to versions 3.5.3 and 3.11.3, the remote read endpoint (/api/v1/read) does not validate the declared decoded length in a snappy-compressed request body before al…
Prometheus is an open-source monitoring system and time series database. Prior to versions 3.5.3 and 3.11.3, the remote read endpoint (/api/v1/read) does not validate the declared decoded length in a snappy-compressed request body before allocating memory. An unauthenticated attacker can send a small payload that causes a huge heap allocation per request. Under concurrent load this can exhaust available memory and crash the Prometheus process. This issue has been patched in versions 3.5.3 and 3.11.3.
Additional publisher context
NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.
Source analysis status: Modified
Weakness classifications: CWE-400 · CWE-789 · CWE-770
Original publisher date fields
published: 2026-05-04T19:16:04.397
lastModified: 2026-11-11T23:10:00.263
1 source CPE criteria · context only
- cpe:2.3:a:prometheus:prometheus:*:*:*:*:*:*:*:*
The original JSON retains the logical configuration operators, exclusions and version bounds.
- Source published
- 4 May 2026 19:16:04 UTC
- Source modified
- 11 Nov 2026 23:10:00 UTC
- Saved here
- 12 Nov 2026 16:19:25 UTC
- Source terms
- NIST NVD usage terms; underlying source attribution retained
Original source record · Cite this exact observation · Complete original publisher JSON
Source: nvd · NIST NVD usage terms; underlying source attribution retained. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.
CVSS 3.1 · [email protected] · Secondary · 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3.1 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c · Secondary · 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
osv · GHSA-8rm2-7qqf-34qm
PublishedPrometheus: Remote read endpoint allows denial of service via crafted snappy payload
### Impact The remote read endpoint (`/api/v1/read`) does not validate the declared decoded length in a snappy-compressed request body before allocating memory. An unauthenticated attacker can send a small payload that causes a huge heap allocation per request. Under concurrent load this can exhaust available memory and crash the Prometheus process. ### Patches _Has the problem been patched? What versions should users upgrade to?_ Fixed in 3.11.3 and 3.5.3 LTS. Users should upgrade to these versions or later. ### Workarounds User who can not upgrade can place Prometheus behind a reverse proxy or firewall that requires authentication before requests reach /api/v1/read.
- Source published
- 5 May 2026 19:34:05 UTC
- Source modified
- 10 Sep 2026 03:50:46 UTC
- Saved here
- 24 Oct 2026 13:19:41 UTC
- Source terms
- GitHub Advisory Database · CC-BY-4.0
Original source record · Cite this exact observation · Complete original publisher JSON
Source: osv · GitHub Advisory Database · CC-BY-4.0. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.
CVSS_V3 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Publisher rating · HIGH
osv · GO-2026-5264
PublishedPrometheus: Remote read endpoint allows denial of service via crafted snappy payload in github.com/prometheus/prometheus
Prometheus: Remote read endpoint allows denial of service via crafted snappy payload in github.com/prometheus/prometheus
- Source published
- 25 Jun 2026 18:43:15 UTC
- Source modified
- 14 Jul 2026 16:41:01 UTC
- Saved here
- 24 Oct 2026 13:19:41 UTC
- Source terms
- OSV · upstream source license applies
Original source record · Cite this exact observation · Complete original publisher JSON
Source: osv · OSV · upstream source license applies. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.