CVE-2025-8556
Github.com/cloudflare/circl: circl-fourq: missing and wrong validation can lead to incorrect results
CVSS Score
3.7
EPSS Score
0.0%
EPSS Percentile
0th
A 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.
| CWE | CWE-1287 |
| Published | Aug 6, 2025 |
| Last Updated | Feb 25, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Affected Versions
Red Hat / Builds for Red Hat OpenShift
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All versions affected References
access.redhat.com: https://access.redhat.com/security/cve/CVE-2025-8556 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2371624 github.com: https://github.com/cloudflare/circl github.com: https://github.com/cloudflare/circl/security/advisories/GHSA-2x5j-vhc8-9cwm github.com: https://github.com/cloudflare/circl/tree/v1.6.1 botanica.software: https://www.botanica.software/blog/cryptographic-issues-in-cloudflares-circl-fourq-implementation news.ycombinator.com: https://news.ycombinator.com/item?id=45669593