Github.com/cloudflare/circl: circl-fourq: missing and wrong validation can lead to incorrect results
Collected exploitation and prediction evidence
Risk source coverageCISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.
No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.
cve-program · CVE-2025-8556
PublishedA flaw was found in CIRCL's implementation of the FourQ elliptic curve. This vulnerability allows an attacker to compromise session security via low-order point injection and incorrect point validation during Diffie-Hellman key exchange.
- Source published
- 6 Aug 2025 08:48:17 UTC
- Source modified
- 27 Oct 2026 05:42:41 UTC
- Observed here
- 27 Oct 2026 07:22:55 UTC
- Source terms
- CVE Program Terms of Use
Original source record · Cite this exact observation · Complete original publisher JSON
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CVSS 3.1 · 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
euvd · EUVD-2025-23815
PublishedA flaw was found in CIRCL's implementation of the FourQ elliptic curve. This vulnerability allows an attacker to compromise session security via low-order point injection and incorrect point validation during Diffie-Hellman key exchange.
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: Aug 6, 2025, 8:48:17 AM
dateUpdated: Oct 27, 2026, 5:42:41 AM
3 related source bulletins · separate from aliases
openSUSE-SU-2026:20730-1: Security update for apptainer
CVE-2023-45288 · CVE-2024-28180 · CVE-2024-3727 · CVE-2024-41110 · CVE-2024-45337 · CVE-2024-45338 · CVE-2025-22869 · CVE-2025-22870 · CVE-2025-22872 · CVE-2025-27144 · CVE-2025-47911 · CVE-2025-47913 · CVE-2025-47914 · CVE-2025-58181 · CVE-2025-58190 · CVE-2025-65105 · CVE-2025-8556 · CVE-2026-24137 · CVE-2026-33186 · CVE-2026-34986
SUSE-SU-2026:0439-1: Security update for apptainer
CVE-2024-45310 · CVE-2025-22869 · CVE-2025-22870 · CVE-2025-22872 · CVE-2025-27144 · CVE-2025-47913 · CVE-2025-47914 · CVE-2025-58181 · CVE-2025-65105 · CVE-2025-8556
openSUSE-SU-2026:10013-1: apptainer-1.4.5-1.1 on GA media
CVE-2025-22872 · CVE-2025-47913 · CVE-2025-47914 · CVE-2025-58181 · CVE-2025-65105 · CVE-2025-8556
- Source published
- Aug 6, 2025, 8:48:17 AM (timezone not stated)
- Source modified
- Oct 27, 2026, 5:42:41 AM (timezone not stated)
- Observed here
- 1 Nov 2026 01:19:47 UTC
- Source terms
- ENISA EUVD · source terms and attribution apply
Original source record · Cite this exact observation · Complete original publisher JSON
This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: euvd · ENISA EUVD · source terms and attribution apply. Source text is retained; field grouping and change labels are provided by ChangeIntel.
EUVD CVSS 3.1 · 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
nvd · CVE-2025-8556
PublishedA flaw was found in CIRCL's implementation of the FourQ elliptic curve. This vulnerability allows an attacker to compromise session security via low-order point injection and incorrect point validation during Diffie-Hellman key exchange.
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: Deferred
Weakness classifications: CWE-1287
Original publisher date fields
published: 2025-08-06T09:15:28.173
lastModified: 2026-10-27T06:17:22.587
- Source published
- 6 Aug 2025 09:15:28 UTC
- Source modified
- 27 Oct 2026 06:17:22 UTC
- Observed here
- 29 Oct 2026 05:48:04 UTC
- Source terms
- NIST NVD usage terms; underlying source attribution retained
Original source record · Cite this exact observation · Complete original publisher JSON
This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: nvd · NIST NVD usage terms; underlying source attribution retained. Source text is retained; field grouping and change labels are provided by ChangeIntel.
CVSS 3.1 · [email protected] · Secondary · 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
osv · GHSA-2x5j-vhc8-9cwm
Published### Impact The CIRCL implementation of FourQ fails to validate user-supplied low-order points during Diffie-Hellman key exchange, potentially allowing attackers to force the identity point and compromise session security. Moreover, there is an incorrect point validation in ScalarMult can lead to incorrect results in the isEqual function and if a point is on the curve. ### Patches Version 1.6.1 (https://github.com/cloudflare/circl/tree/v1.6.1) mitigates the identified issues. We acknowledge Alon Livne (Botanica Software Labs) for the reported findings.
- Source published
- 10 Jun 2025 21:18:33 UTC
- Source modified
- 10 Sep 2026 03:50:24 UTC
- Observed 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
This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · GitHub Advisory Database · CC-BY-4.0. Source text is retained; field grouping and change labels are provided by ChangeIntel.
CVSS_V3 · CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Publisher rating · LOW
osv · GO-2025-3754
PublishedCIRCL-Fourq: Missing and wrong validation can lead to incorrect results in github.com/cloudflare/circl
- Source published
- 11 Jun 2025 17:45:49 UTC
- Source modified
- 4 Feb 2026 02:49:19 UTC
- Observed 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
This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · OSV · upstream source license applies. Source text is retained; field grouping and change labels are provided by ChangeIntel.