{"id":"CVE-2025-8556","details":"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.","aliases":["GHSA-2x5j-vhc8-9cwm","GO-2025-3754"],"modified":"2026-03-23T05:02:31.415540Z","published":"2025-08-06T09:15:28.173Z","related":["CGA-2w9c-phq9-xm8h","SUSE-SU-2026:0439-1","openSUSE-SU-2026:10013-1"],"references":[{"type":"WEB","url":"https://github.com/cloudflare/circl/tree/v1.6.1"},{"type":"WEB","url":"https://news.ycombinator.com/item?id=45669593"},{"type":"WEB","url":"https://access.redhat.com/security/cve/CVE-2025-8556"},{"type":"ADVISORY","url":"https://github.com/cloudflare/circl/security/advisories/GHSA-2x5j-vhc8-9cwm"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2371624"},{"type":"PACKAGE","url":"https://github.com/cloudflare/circl"},{"type":"ARTICLE","url":"https://www.botanica.software/blog/cryptographic-issues-in-cloudflares-circl-fourq-implementation"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-8556.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N"}]}