{"cve":"CVE-2025-8556","nvd":{"published":"2025-08-06T09:15:28.173","modified":"2026-10-27T06:17:22.587","status":"Deferred","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","score":3.7},"cwes":["CWE-1287"],"references":["https://access.redhat.com/security/cve/CVE-2025-8556","https://bugzilla.redhat.com/show_bug.cgi?id=2371624","https://github.com/cloudflare/circl","https://github.com/cloudflare/circl/security/advisories/GHSA-2x5j-vhc8-9cwm","https://github.com/cloudflare/circl/tree/v1.6.1"],"products":[],"source":"nvd","synced_at":"2026-10-27T06:41:43.371740013+00:00"},"epss":{"cve":"CVE-2025-8556","score":0.00501,"percentile":0.42605,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-2x5j-vhc8-9cwm","url":"https://osv.dev/vulnerability/GHSA-2x5j-vhc8-9cwm","summary":"CIRCL-Fourq: Missing and wrong validation can lead to incorrect results","modified":"2026-09-10T03:50:24.762078780Z","packages":[{"ecosystem":"Go","name":"github.com/cloudflare/circl","purl":"pkg:golang/github.com/cloudflare/circl","ranges":["<1.6.1"],"fixed":["1.6.1"]}]},{"id":"GO-2025-3754","url":"https://osv.dev/vulnerability/GO-2025-3754","summary":"CIRCL-Fourq: Missing and wrong validation can lead to incorrect results in github.com/cloudflare/circl","modified":"2026-02-04T02:49:19.109390Z","packages":[{"ecosystem":"Go","name":"github.com/cloudflare/circl","purl":"pkg:golang/github.com/cloudflare/circl","ranges":["<1.6.1"],"fixed":["1.6.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}