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golang-github-cloudflare-circl — security advisory

Type: advisorySources: OSVAdvisory ID: DEBIAN-CVE-2025-8556

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.

Products
golang-github-cloudflare-circl
Affected versions
1.3.1-2, 1.3.2-1, 1.3.3-1, 1.3.5-1, 1.3.6-1, 1.3.7-1, 1.3.8-1, 1.3.9-1, 1.4.0-1, 1.5.0-1, 1.6.0-1, 1.6.1-1, 1.6.3-1, 1.6.4-1, 1.6.4-2, 1.6.5-1, 1.6.5-2
Fixed versions
1.6.1-1
CVEs
CVE-2025-8556
Confirmed fixed CVEs
Not specified
Updated in this feed
1 Nov 2026, 17:43 UTC · Revision 1

Source evidence

DEBIAN-CVE-2025-8556

core-osv · Original source

Published 6 Aug 2025, 09:15 UTC

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.

osv:DEBIAN-CVE-2025-8556

golang-github-cloudflare-circl

Fixed versions: Not specified

golang-github-cloudflare-circl

Fixed versions: 1.6.1-1

golang-github-cloudflare-circl

Fixed versions: 1.6.1-1

Complete source record
{
  "id": "13dbbf0538d1665533a8a53a89e74493c63441956e237988c0c4dad581a2edf3",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2025-8556",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2025-8556",
    "summary": "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.",
    "evidence": "osv:DEBIAN-CVE-2025-8556",
    "products": [
      {
        "name": {
          "value": "golang-github-cloudflare-circl",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.3.1-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.3.2-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.3.3-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.3.5-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.3.6-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.3.7-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.3.8-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.3.9-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.4.0-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.5.0-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.6.0-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.6.1-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.6.3-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.6.4-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.6.4-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.6.5-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.6.5-2",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "golang-github-cloudflare-circl",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.6.1-1",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "golang-github-cloudflare-circl",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.6.1-1",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "low",
    "structured": {
      "id": "DEBIAN-CVE-2025-8556",
      "aliases": [
        "DEBIAN-CVE-2025-8556"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "golang-github-cloudflare-circl",
            "purl": "pkg:deb/debian/golang-github-cloudflare-circl?arch=source&distro=bookworm",
            "ecosystem": "Debian:12"
          },
          "versions": [
            "1.3.1-2",
            "1.3.2-1",
            "1.3.3-1",
            "1.3.5-1",
            "1.3.6-1",
            "1.3.7-1",
            "1.3.8-1",
            "1.3.9-1",
            "1.4.0-1",
            "1.5.0-1",
            "1.6.0-1",
            "1.6.1-1",
            "1.6.3-1",
            "1.6.4-1",
            "1.6.4-2",
            "1.6.5-1",
            "1.6.5-2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-8556.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.6.1-1"
                }
              ]
            }
          ],
          "package": {
            "name": "golang-github-cloudflare-circl",
            "purl": "pkg:deb/debian/golang-github-cloudflare-circl?arch=source&distro=trixie",
            "ecosystem": "Debian:13"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-8556.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.6.1-1"
                }
              ]
            }
          ],
          "package": {
            "name": "golang-github-cloudflare-circl",
            "purl": "pkg:deb/debian/golang-github-cloudflare-circl?arch=source&distro=forky",
            "ecosystem": "Debian:14"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-8556.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        }
      ],
      "modified": "2026-10-27T09:47:33.273790492Z",
      "provider": "osv",
      "upstream": [
        "CVE-2025-8556"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2025-8556"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2025-8556",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 461043,
  "published_at": "2025-08-06T09:15:28.173+00:00"
}