{"id":"CVE-2025-8556","summary":"Github.com/cloudflare/circl: circl-fourq: missing and wrong validation can lead to incorrect results","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":"2026-05-18T05:58:23.571101326Z","published":"2025-08-06T08:48:17.946Z","related":["CGA-2w9c-phq9-xm8h","SUSE-SU-2026:0439-1","openSUSE-SU-2026:10013-1","openSUSE-SU-2026:20730-1"],"database_specific":{"cna_assigner":"redhat","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/8xxx/CVE-2025-8556.json","cwe_ids":["CWE-1287"]},"references":[{"type":"WEB","url":"https://access.redhat.com/downloads/content/package-browser/"},{"type":"WEB","url":"https://github.com/cloudflare/circl/"},{"type":"WEB","url":"https://github.com/cloudflare/circl/tree/v1.6.1"},{"type":"WEB","url":"https://news.ycombinator.com/item?id=45669593"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2025-8556"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/8xxx/CVE-2025-8556.json"},{"type":"ADVISORY","url":"https://github.com/cloudflare/circl/security/advisories/GHSA-2x5j-vhc8-9cwm"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-8556"},{"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":[{"ranges":[{"type":"GIT","repo":"https://github.com/cloudflare/circl","events":[{"introduced":"0"},{"fixed":"c6d33e35234ebf5c4319d12ae7d77d7d17053e56"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"0"},{"fixed":"1.6.1"}]}}],"versions":["v1.6.0","v1.5.0","v1.4.0","v1.3.9","v1.3.8","v1.3.7","v1.3.6","v1.3.3","v1.3.2","v1.3.1","v1.3.0","v1.2.0","v1.1.0","v1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-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"}]}