CVE-2026-1528

undici is vulnerable to Malicious WebSocket 64-bit length overflows undici parser and crashes the client

CVSS 3.1 7.5 HIGHEUVD CVSS 3.1 7.5 CVSS 3.1 · ce714d77-add3-4f53-aff5-83d477b104bb · Secondary 7.5 HIGHCVSS 3.1 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c · Secondary 7.5 HIGHCVSS_V3 Publisher rating HIGHFixed by undici 6.24.0 Fixed by undici 7.24.0KEV status unknown

Original advisory

cve-program · CVE-2026-1528

Published

ImpactA server can reply with a WebSocket frame using the 64-bit length form and an extremely large length. undici's ByteParser overflows internal math, ends up in an invalid state, and throws a fatal TypeError that terminates the process. Patches Patched in the undici version v7.24.0 and v6.24.0. Users should upgrade to this version or later.

Read the publisher's advisory

euvd · EUVD-2026-11703

Published

Read the publisher's advisory

nvd · CVE-2026-1528

Published

Read the publisher's advisory

osv · GHSA-f269-vfmq-vjvj

Published

### Impact A server can reply with a WebSocket frame using the 64-bit length form and an extremely large length. undici's ByteParser overflows internal math, ends up in an invalid state, and throws a fatal TypeError that terminates the process. ### Patches Patched in the undici version v7.24.0 and v6.24.0. Users should upgrade to this version or later. ### Workarounds There are no workarounds.

Read the publisher's advisory

Affected versions, risk and source history

Exploitation and risk

Source status

CISA 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.

Which CVEs have scores here?

This view includes predictions for CVE identifiers explicitly listed in public NuGet advisories. Microsoft release pages have their own prediction coverage. Check source status for the scope and latest checks.

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-2026-1528

Published

undici is vulnerable to Malicious WebSocket 64-bit length overflows undici parser and crashes the client

Source published: 12 Mar 2026 20:21:57 UTC
Source modified: 14 Sep 2026 12:04:20 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-2026-11703

Published

ImpactA server can reply with a WebSocket frame using the 64-bit length form and an extremely large length. undici's ByteParser overflows internal math, ends up in an invalid state, and throws a fatal TypeError that terminates the process.

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: Mar 12, 2026, 8:21:57 PM

dateUpdated: Sep 14, 2026, 12:04:20 PM

16 related source bulletins · separate from aliases

RHSA-2026:7302: Red Hat Security Advisory: nodejs:22 security update

CVE-2026-1525 · CVE-2026-1526 · CVE-2026-1528 · CVE-2026-2229 · CVE-2026-21710 · CVE-2026-25547 · CVE-2026-26996 · CVE-2026-27135 · CVE-2026-27904

RHSA-2026:7983: Red Hat Security Advisory: nodejs:22 security update

CVE-2026-1525 · CVE-2026-1526 · CVE-2026-1528 · CVE-2026-2229 · CVE-2026-21710 · CVE-2026-25547 · CVE-2026-26996 · CVE-2026-27135 · CVE-2026-27904

RHSA-2026:7080: Red Hat Security Advisory: nodejs22 security update

CVE-2026-1525 · CVE-2026-1526 · CVE-2026-1528 · CVE-2026-2229 · CVE-2026-21710 · CVE-2026-25547 · CVE-2026-26996 · CVE-2026-27135 · CVE-2026-27904

RHSA-2026:34342: Red Hat Security Advisory: Cluster Observability Operator 1.5.0

CVE-2020-7753 · CVE-2021-33623 · CVE-2024-4068 · CVE-2024-45338 · CVE-2024-52011 · CVE-2025-22868 · CVE-2025-22870 · CVE-2025-22872 · CVE-2025-47911 · CVE-2025-58190 · CVE-2026-1526 · CVE-2026-1528 · CVE-2026-2229 · CVE-2026-4800 · CVE-2026-4867 · CVE-2026-6321 · CVE-2026-6322 · CVE-2026-6734 · CVE-2026-9277 · CVE-2026-9697 · CVE-2026-12143 · CVE-2026-12151 · CVE-2026-25680 · CVE-2026-25681 · CVE-2026-29063 · CVE-2026-32141 · CVE-2026-33228 · CVE-2026-33671 · CVE-2026-33814 · CVE-2026-33891 · CVE-2026-33894 · CVE-2026-33895 · CVE-2026-33896 · CVE-2026-33937 · CVE-2026-33938 · CVE-2026-33939 · CVE-2026-33940 · CVE-2026-33941 · CVE-2026-39821 · CVE-2026-42506 · CVE-2026-48779

RHSA-2026:13826: Red Hat Security Advisory: Red Hat Developer Hub 1.9.4 release.

CVE-2025-62718 · CVE-2025-69534 · CVE-2026-1525 · CVE-2026-1526 · CVE-2026-1528 · CVE-2026-2229 · CVE-2026-3118 · CVE-2026-4800 · CVE-2026-4926 · CVE-2026-27601 · CVE-2026-27904 · CVE-2026-29063 · CVE-2026-29074 · CVE-2026-29186 · CVE-2026-32141 · CVE-2026-32280 · CVE-2026-32282 · CVE-2026-33228 · CVE-2026-33891 · CVE-2026-33894 · CVE-2026-33895 · CVE-2026-33896 · CVE-2026-39983 · CVE-2026-40175 · CVE-2026-40895

RHSA-2026:5807: Red Hat Security Advisory: RHOAI 2.16.4 - Red Hat OpenShift AI

CVE-2024-25621 · CVE-2025-6193 · CVE-2025-12060 · CVE-2025-12638 · CVE-2025-12816 · CVE-2025-61726 · CVE-2025-61729 · CVE-2025-66031 · CVE-2025-66418 · CVE-2025-66626 · CVE-2025-68156 · CVE-2025-69873 · CVE-2026-1526 · CVE-2026-1528 · CVE-2026-2229 · CVE-2026-25223 · CVE-2026-25639 · CVE-2026-29074 · CVE-2026-32141

RHSA-2026:7670: Red Hat Security Advisory: nodejs:24 security update

CVE-2026-1525 · CVE-2026-1526 · CVE-2026-1527 · CVE-2026-1528 · CVE-2026-2229 · CVE-2026-2581 · CVE-2026-21637 · CVE-2026-21710 · CVE-2026-21711 · CVE-2026-21712 · CVE-2026-21713 · CVE-2026-21714 · CVE-2026-21715 · CVE-2026-21716 · CVE-2026-21717 · CVE-2026-26996 · CVE-2026-27135

RHSA-2026:7675: Red Hat Security Advisory: nodejs24 security update

RHSA-2026:73987: Red Hat Security Advisory: RHOAI 3.3.7 - Red Hat OpenShift AI

CVE-2025-61726 · CVE-2025-66471 · CVE-2025-71408 · CVE-2026-1525 · CVE-2026-1526 · CVE-2026-1528 · CVE-2026-2229 · CVE-2026-5422 · CVE-2026-6321 · CVE-2026-6734 · CVE-2026-9697 · CVE-2026-11816 · CVE-2026-11822 · CVE-2026-11824 · CVE-2026-12151 · CVE-2026-13149 · CVE-2026-15154 · CVE-2026-15378 · CVE-2026-16221 · CVE-2026-16745 · CVE-2026-18951 · CVE-2026-23490 · CVE-2026-25681 · CVE-2026-27136 · CVE-2026-27489 · CVE-2026-27893 · CVE-2026-28356 · CVE-2026-28500 · CVE-2026-28684 · CVE-2026-31230 · CVE-2026-31958 · CVE-2026-32274 · CVE-2026-32286 · CVE-2026-32597 · CVE-2026-33186 · CVE-2026-33231 · CVE-2026-33245 · CVE-2026-33811 · CVE-2026-33814 · CVE-2026-33815 · CVE-2026-33816 · CVE-2026-34445 · CVE-2026-34986 · CVE-2026-34993 · CVE-2026-35397 · CVE-2026-35536 · CVE-2026-39821 · CVE-2026-39828 · CVE-2026-39829 · CVE-2026-39830 · CVE-2026-39831 · CVE-2026-39832 · CVE-2026-39835 · CVE-2026-40110 · CVE-2026-41242 · CVE-2026-42215 · CVE-2026-42294 · CVE-2026-42296 · CVE-2026-42297 · CVE-2026-42338 · CVE-2026-42502 · CVE-2026-42508 · CVE-2026-44240 · CVE-2026-44431 · CVE-2026-44432 · CVE-2026-44727 · CVE-2026-44843 · CVE-2026-45736 · CVE-2026-46595 · CVE-2026-48526 · CVE-2026-48586 · CVE-2026-48710 · CVE-2026-48746 · CVE-2026-48779 · CVE-2026-49855 · CVE-2026-53550 · CVE-2026-54058 · CVE-2026-54283 · CVE-2026-55969 · CVE-2026-56853 · CVE-2026-56858 · CVE-2026-56859 · CVE-2026-56860 · CVE-2026-56862 · CVE-2026-59197 · CVE-2026-59199 · CVE-2026-59200 · CVE-2026-59204 · CVE-2026-59205 · CVE-2026-59869 · CVE-2026-59873 · CVE-2026-59874 · CVE-2026-59884 · CVE-2026-59885 · CVE-2026-59886 · CVE-2026-62384 · CVE-2026-63310 · CVE-2026-64834 · CVE-2026-64835 · CVE-2026-66036 · CVE-2026-66037 · CVE-2026-66038 · CVE-2026-66040 · CVE-2026-67322 · CVE-2026-67323 · CVE-2026-67325 · CVE-2026-68770 · CVE-2026-69152 · CVE-2026-69192 · CVE-2026-69243 · CVE-2026-69244 · CVE-2026-71281 · CVE-2026-73089 · CVE-2026-73415 · CVE-2026-73417 · CVE-2026-73627 · CVE-2026-78682 · CVE-2026-79674 · CVE-2026-79675 · CVE-2026-80205 · CVE-2026-81722 · CVE-2026-81724 · CVE-2026-81727 · CVE-2026-84375 · CVE-2026-84445

RHSA-2026:21772: Red Hat Security Advisory: Red Hat OpenShift Dev Spaces 3.28.0 Release.

CVE-2025-14813 · CVE-2025-68121 · CVE-2026-0636 · CVE-2026-1525 · CVE-2026-1526 · CVE-2026-1528 · CVE-2026-1605 · CVE-2026-2229 · CVE-2026-2327 · CVE-2026-5588 · CVE-2026-26996 · CVE-2026-27904 · CVE-2026-29074 · CVE-2026-30827 · CVE-2026-31802 · CVE-2026-32141 · CVE-2026-32280 · CVE-2026-32282 · CVE-2026-32305 · CVE-2026-33252 · CVE-2026-33810 · CVE-2026-34742 · CVE-2026-35051 · CVE-2026-39858 · CVE-2026-40477 · CVE-2026-40478 · CVE-2026-40611 · CVE-2026-40895 · CVE-2026-40912 · CVE-2026-40972 · CVE-2026-40973 · CVE-2026-40975 · CVE-2026-41240 · CVE-2026-42033 · CVE-2026-42035 · CVE-2026-42039 · CVE-2026-42041 · CVE-2026-42043 · CVE-2026-42044

RHSA-2026:17789: Red Hat Security Advisory: Red Hat build of Cryostat 4.2.0: new RHEL 9 container image security update

CVE-2026-1002 · CVE-2026-1525 · CVE-2026-1526 · CVE-2026-1528 · CVE-2026-2229 · CVE-2026-4800 · CVE-2026-4926 · CVE-2026-33186 · CVE-2026-33813 · CVE-2026-33815 · CVE-2026-33816 · CVE-2026-33870 · CVE-2026-33871 · CVE-2026-34986 · CVE-2026-39852 · CVE-2026-40895

RHSA-2026:7350: Red Hat Security Advisory: nodejs:24 security update

RHSA-2026:7123: Red Hat Security Advisory: nodejs:22 security update

CVE-2026-1525 · CVE-2026-1526 · CVE-2026-1528 · CVE-2026-2229 · CVE-2026-21710 · CVE-2026-25547 · CVE-2026-26996 · CVE-2026-27135 · CVE-2026-27904

RHSA-2026:7310: Red Hat Security Advisory: nodejs22 security update

CVE-2026-1525 · CVE-2026-1526 · CVE-2026-1528 · CVE-2026-2229 · CVE-2026-21710 · CVE-2026-25547 · CVE-2026-26996 · CVE-2026-27135 · CVE-2026-27904

RHSA-2026:21931: Red Hat Security Advisory: Red Hat OpenShift Pipelines Release 1.20.5

CVE-2026-1526 · CVE-2026-1528 · CVE-2026-2229 · CVE-2026-29063 · CVE-2026-33186 · CVE-2026-33211 · CVE-2026-34986

RHSA-2026:9742: Red Hat Security Advisory: Red Hat Developer Hub 1.8.6 release.

CVE-2025-62718 · CVE-2025-69534 · CVE-2025-69873 · CVE-2026-1525 · CVE-2026-1526 · CVE-2026-1528 · CVE-2026-2229 · CVE-2026-3118 · CVE-2026-4800 · CVE-2026-4926 · CVE-2026-25679 · CVE-2026-26996 · CVE-2026-27601 · CVE-2026-27904 · CVE-2026-29063 · CVE-2026-29074 · CVE-2026-29186 · CVE-2026-32141 · CVE-2026-33036 · CVE-2026-33228 · CVE-2026-33891 · CVE-2026-33894 · CVE-2026-33895 · CVE-2026-33896 · CVE-2026-39983 · CVE-2026-40175

Source published: Mar 12, 2026, 8:21:57 PM (timezone not stated)
Source modified: Sep 14, 2026, 12:04:20 PM (timezone not stated)
Saved here: 13 Nov 2026 06:58:56 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-2026-1528

Published

ImpactA server can reply with a WebSocket frame using the 64-bit length form and an extremely large length. undici's ByteParser overflows internal math, ends up in an invalid state, and throws a fatal TypeError that terminates the process.

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-248 · CWE-1284

Original publisher date fields

published: 2026-03-12T21:16:25.330

lastModified: 2026-09-04T13:18:18.160

1 source CPE criteria · context only

cpe:2.3:a:nodejs:undici:*:*:*:*:*:node.js:*:*

The original JSON retains the logical configuration operators, exclusions and version bounds.

Source published: 12 Mar 2026 21:16:25 UTC
Source modified: 4 Sep 2026 13:18:18 UTC
Saved here: 25 Oct 2026 05:17:25 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 · ce714d77-add3-4f53-aff5-83d477b104bb · 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-f269-vfmq-vjvj

Published

Undici: Malicious WebSocket 64-bit length overflows parser and crashes the client

Source published: 13 Mar 2026 20:07:26 UTC
Source modified: 10 Sep 2026 03:50:38 UTC
Saved here: 24 Oct 2026 13:17:17 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