minisign — security advisory

{
  "id": "88cabd0f35379dedbfe24bcd939841bb8fb9c1f09048e62dd993a2c2382fb58b",
  "url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-95625",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "UBUNTU-CVE-2026-95625",
    "summary": "The Tauri updater plugin verifies update binaries using minisign signatures, but the signature covers only the raw binary bytes. The update manifest -- which contains the version number, download URL, and signature -- is fetched over TLS but is never itself signed or authenticated. Because the only anti-rollback check compares the manifest's version field against the current version, and that field is unsigned, an attacker who can serve a crafted manifest can force installation of any older signed release without possessing the developer's private key.",
    "evidence": "osv:UBUNTU-CVE-2026-95625",
    "products": [
      {
        "name": {
          "value": "minisign",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "0.11-1",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "minisign",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "0.12-1build1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "0.12-1build2",
            "evidence": "/affected/1/versions"
          }
        ]
      },
      {
        "name": {
          "value": "minisign",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "0.12-1",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "0.12-1build1",
            "evidence": "/affected/2/versions"
          }
        ]
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "UBUNTU-CVE-2026-95625",
      "aliases": [
        "UBUNTU-CVE-2026-95625"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N"
        },
        {
          "type": "Ubuntu",
          "score": "medium"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "minisign",
            "purl": "pkg:deb/ubuntu/minisign?arch=source&distro=noble",
            "ecosystem": "Ubuntu:24.04:LTS"
          },
          "versions": [
            "0.11-1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-95625.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "minisign",
                "binary_version": "0.11-1"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "minisign",
            "purl": "pkg:deb/ubuntu/minisign?arch=source&distro=stonking",
            "ecosystem": "Ubuntu:26.10"
          },
          "versions": [
            "0.12-1build1",
            "0.12-1build2"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-95625.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "minisign",
                "binary_version": "0.12-1build2"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "minisign",
            "purl": "pkg:deb/ubuntu/minisign?arch=source&distro=resolute",
            "ecosystem": "Ubuntu:26.04:LTS"
          },
          "versions": [
            "0.12-1",
            "0.12-1build1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-95625.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "minisign",
                "binary_version": "0.12-1build1"
              }
            ]
          }
        }
      ],
      "modified": "2026-10-17T13:01:19.628259962Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-95625"
      ],
      "references": [
        "https://ubuntu.com/security/CVE-2026-95625",
        "https://www.cve.org/CVERecord?id=CVE-2026-95625",
        "https://github.com/tauri-apps/plugins-workspace",
        "https://github.com/tauri-apps/plugins-workspace/commit/690dcfd694",
        "https://github.com/tauri-apps/plugins-workspace/releases/tag/updater-v2.12.0",
        "https://github.com/tauri-apps/plugins-workspace/security/advisories/GHSA-j38x-g3m3-95fr"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-95625",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 361702,
  "published_at": "2026-09-23T09:17:00+00:00"
}