UnratedFix available

DEBIAN-CVE-2026-87733

Type: advisorySource: OSV1 source record

An issue was discovered in the mirage-crypto-ec function before 2.2.0 for OCaml. The ECDSA functions {P256,P384,P521}.Dsa.pub_of_octets accept 0x00, the encoding of the point at infinity, as a public key. With that public key, signatures can be forged without a private key.

Announced 9 Sept 2026Source revision 1

Original source ↗

DEBIAN-CVE-2026-87733

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:DEBIAN-CVE-2026-87733

ocaml-mirage-crypto

Source reference: /affected/0/package/name

Affected versions: 0.10.7-1
Source reference: /affected/0/versions
0.11.1-1
Source reference: /affected/0/versions
0.11.1-2
Source reference: /affected/0/versions
0.11.1-3
Source reference: /affected/0/versions
0.11.2-1
Source reference: /affected/0/versions
0.11.2-2
Source reference: /affected/0/versions
0.11.3-1
Source reference: /affected/0/versions
1.1.0-1
Source reference: /affected/0/versions
1.1.0-2
Source reference: /affected/0/versions
2.0.0-1
Source reference: /affected/0/versions
2.0.1-1
Source reference: /affected/0/versions
2.0.2-1
Source reference: /affected/0/versions
2.0.3-1
Source reference: /affected/0/versions
2.1.0-1
Source reference: /affected/0/versions
2.2.0-1
Source reference: /affected/0/versions
2.2.0-2
Source reference: /affected/0/versions
2.3.0-1
Source reference: /affected/0/versions
2.4.0-1
Source reference: /affected/0/versions
2.4.1-1
Source reference: /affected/0/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

ocaml-mirage-crypto

Source reference: /affected/1/package/name

Affected versions: 2.0.0-1
Source reference: /affected/1/versions
2.0.1-1
Source reference: /affected/1/versions
2.0.2-1
Source reference: /affected/1/versions
2.0.3-1
Source reference: /affected/1/versions
2.1.0-1
Source reference: /affected/1/versions
2.2.0-1
Source reference: /affected/1/versions
2.2.0-2
Source reference: /affected/1/versions
2.3.0-1
Source reference: /affected/1/versions
2.4.0-1
Source reference: /affected/1/versions
2.4.1-1
Source reference: /affected/1/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

ocaml-mirage-crypto

Source reference: /affected/2/package/name

Affected versions: 2.0.0-1
Source reference: /affected/2/versions
2.0.1-1
Source reference: /affected/2/versions
2.0.2-1
Source reference: /affected/2/versions
2.0.3-1
Source reference: /affected/2/versions
2.1.0-1
Source reference: /affected/2/versions
Fixed versions: 2.2.0-1
Source reference: /affected/2/ranges
Prerequisites: Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "ocaml-mirage-crypto",
      "purl": "pkg:deb/debian/ocaml-mirage-crypto?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "0.10.7-1",
      "0.11.1-1",
      "0.11.1-2",
      "0.11.1-3",
      "0.11.2-1",
      "0.11.2-2",
      "0.11.3-1",
      "1.1.0-1",
      "1.1.0-2",
      "2.0.0-1",
      "2.0.1-1",
      "2.0.2-1",
      "2.0.3-1",
      "2.1.0-1",
      "2.2.0-1",
      "2.2.0-2",
      "2.3.0-1",
      "2.4.0-1",
      "2.4.1-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-87733.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "ocaml-mirage-crypto",
      "purl": "pkg:deb/debian/ocaml-mirage-crypto?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "2.0.0-1",
      "2.0.1-1",
      "2.0.2-1",
      "2.0.3-1",
      "2.1.0-1",
      "2.2.0-1",
      "2.2.0-2",
      "2.3.0-1",
      "2.4.0-1",
      "2.4.1-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-87733.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "2.2.0-1"
          }
        ]
      }
    ],
    "package": {
      "name": "ocaml-mirage-crypto",
      "purl": "pkg:deb/debian/ocaml-mirage-crypto?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "2.0.0-1",
      "2.0.1-1",
      "2.0.2-1",
      "2.0.3-1",
      "2.1.0-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-87733.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event: #58540 · Revision 1
Added to Heist Feed: Sun, 25 Oct 2026 18:11:39 GMT
Publisher date: Wed, 09 Sep 2026 05:18:20 GMT

Read the original announcement