openssl — security advisory

{
  "id": "ccaf7abd5acd5e1b069952ac957b4e53ddce646b42dcf0b90144dec2eb81f4de",
  "url": "https://osv.dev/vulnerability/ALPINE-CVE-2026-77696",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ALPINE-CVE-2026-77696",
    "summary": "Issue summary: SM2 signature generation uses non-constant-time arithmetic on secret values, forming a timing side-channel. Impact summary: An attacker able to measure SM2 signing times may learn information about the per-signature secret nonce, which over many signatures can, via a lattice / Hidden Number Problem attack, lead to recovery of the private key. CWE: CWE-208: Observable Timing Discrepancy Description: SM2 signature generation computes the signature value using variable-time BIGNUM operations on the secret nonce and the private key, so the time taken to produce an SM2 signature depends on these secret values, forming a timing side-channel. Applications performing SM2 signature generation are affected on all platforms. FIPS Impact: no SM2 is not a FIPS algorithm.",
    "evidence": "osv:ALPINE-CVE-2026-77696",
    "products": [
      {
        "name": {
          "value": "openssl",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "3.3.7-r2",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "low",
    "structured": {
      "id": "ALPINE-CVE-2026-77696",
      "aliases": [
        "ALPINE-CVE-2026-77696"
      ],
      "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": "1.1.1"
                },
                {
                  "fixed": "3.3.7-r2"
                }
              ]
            }
          ],
          "package": {
            "name": "openssl",
            "purl": "pkg:apk/alpine/openssl?arch=source",
            "ecosystem": "Alpine:v3.21"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-77696.json"
          },
          "ecosystem_specific": {}
        }
      ],
      "modified": "2026-10-08T09:30:02.599218412Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-77696"
      ],
      "references": [
        "https://security.alpinelinux.org/vuln/CVE-2026-77696"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-77696",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 98851,
  "published_at": "2026-09-29T16:17:11.493+00:00"
}