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ALPINE-CVE-2026-45446

Type: advisorySource: OSV1 source record

Issue summary: The implementations of AES-SIV (RFC 5297) and AES-GCM-SIV (RFC 8452) mishandle the authentication of AAD (Additional Authenticated Data) with an empty ciphertext allowing a forgery of such messages. Impact summary: An attacker can forge empty messages with arbitrary AAD to the victim's application using these ciphers. AES-SIV (RFC 5297) and AES-GCM-SIV (RFC 8452) are nonce-misuse-resistant AEAD modes: they accept a key, nonce, optional AAD (bytes that are authenticated but not encrypted), and plaintext, and produces ciphertext plus a 16-byte tag. On decrypt, `EVP_DecryptFinal_ex()` is documented to return success only if the tag is verified succesfully. In OpenSSL's provider implementation of these ciphers, the expected tag is computed only when decryption function is invoked with non-empty data. If the caller supplies AAD and then calls `EVP_DecryptFinal_ex()` without invocation of the ciphertext update, which can happen when the received ciphertext length is zero, the tag is never recalculated and still holds its all-zeros value. When AES-GCM-SIV is used, an attacker who sends arbitrary AAD, empty ciphertext, and all-zeros tag passes authentication under any key they do not know, single-shot. When AES-SIV is used, for mounting the attack it's necessary for the application to reuse the decryption context without resetting the key. AES-SIV is implemented since OpenSSL 3.0. AES-GCM-SIV is implemented since OpenSSL 3.2. No protocols implemented in OpenSSL itself

Announced Source revision 1
Original source ↗

ALPINE-CVE-2026-45446

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:ALPINE-CVE-2026-45446

openssl

Source reference: /affected/0/package/name

Affected versions
Not stated in this record
Fixed versions
3.3.7-r1

Source reference: /affected/0/ranges

Prerequisites
Not stated in this record

openssl

Source reference: /affected/1/package/name

Affected versions
Not stated in this record
Fixed versions
3.5.7-r0

Source reference: /affected/1/ranges

Prerequisites
Not stated in this record

openssl

Source reference: /affected/2/package/name

Affected versions
Not stated in this record
Fixed versions
3.5.7-r0

Source reference: /affected/2/ranges

Prerequisites
Not stated in this record

openssl

Source reference: /affected/3/package/name

Affected versions
Not stated in this record
Fixed versions
3.5.7-r0

Source reference: /affected/3/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": "3.0.0"
          },
          {
            "fixed": "3.3.7-r1"
          }
        ]
      }
    ],
    "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-2026-45446.json"
    },
    "ecosystem_specific": {}
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "3.0.0"
          },
          {
            "fixed": "3.5.7-r0"
          }
        ]
      }
    ],
    "package": {
      "name": "openssl",
      "purl": "pkg:apk/alpine/openssl?arch=source",
      "ecosystem": "Alpine:v3.22"
    },
    "database_specific": {
      "source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-45446.json"
    },
    "ecosystem_specific": {}
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "3.0.0"
          },
          {
            "fixed": "3.5.7-r0"
          }
        ]
      }
    ],
    "package": {
      "name": "openssl",
      "purl": "pkg:apk/alpine/openssl?arch=source",
      "ecosystem": "Alpine:v3.23"
    },
    "database_specific": {
      "source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-45446.json"
    },
    "ecosystem_specific": {}
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "3.0.0"
          },
          {
            "fixed": "3.5.7-r0"
          }
        ]
      }
    ],
    "package": {
      "name": "openssl",
      "purl": "pkg:apk/alpine/openssl?arch=source",
      "ecosystem": "Alpine:v3.24"
    },
    "database_specific": {
      "source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-45446.json"
    },
    "ecosystem_specific": {}
  }
]

Publisher severity

No explicit severity was provided.

Event
#54443 · Revision 1
Added to Heist Feed
Publisher date
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