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DEBIAN-CVE-2026-5504

Type: advisorySource: OSV1 source record

A padding oracle exists in wolfSSL's PKCS7 CBC decryption that could allow an attacker to recover plaintext through repeated decryption queries with modified ciphertext. In previous versions of wolfSSL the interior padding bytes are not validated.

Announced Source revision 1
Original source ↗

DEBIAN-CVE-2026-5504

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-2026-5504

wolfssl

Source reference: /affected/0/package/name

Affected versions
5.5.4-2

Source reference: /affected/0/versions

5.5.4-2+deb12u1

Source reference: /affected/0/versions

5.5.4-2+deb12u2

Source reference: /affected/0/versions

5.5.4-2+deb12u3

Source reference: /affected/0/versions

5.5.4-2.1

Source reference: /affected/0/versions

5.6.4-1

Source reference: /affected/0/versions

5.6.4-2

Source reference: /affected/0/versions

5.6.6-1

Source reference: /affected/0/versions

5.6.6-1.1

Source reference: /affected/0/versions

5.6.6-1.2

Source reference: /affected/0/versions

5.6.6-1.3

Source reference: /affected/0/versions

5.6.6-1.3~exp1

Source reference: /affected/0/versions

5.7.0-0.1

Source reference: /affected/0/versions

5.7.0-0.2

Source reference: /affected/0/versions

5.7.0-0.3

Source reference: /affected/0/versions

5.7.2-0.1

Source reference: /affected/0/versions

5.7.2-0.2

Source reference: /affected/0/versions

5.7.2-0.3

Source reference: /affected/0/versions

5.7.2-0.4

Source reference: /affected/0/versions

5.8.2-1

Source reference: /affected/0/versions

5.8.2-1.1

Source reference: /affected/0/versions

5.8.2-1.2

Source reference: /affected/0/versions

5.8.4-1

Source reference: /affected/0/versions

5.9.0-0.1

Source reference: /affected/0/versions

5.9.0-0.2

Source reference: /affected/0/versions

5.9.1-0.1

Source reference: /affected/0/versions

5.9.2-1

Source reference: /affected/0/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

wolfssl

Source reference: /affected/1/package/name

Affected versions
5.7.2-0.1

Source reference: /affected/1/versions

5.7.2-0.1+deb13u1

Source reference: /affected/1/versions

5.7.2-0.1+deb13u2

Source reference: /affected/1/versions

5.7.2-0.2

Source reference: /affected/1/versions

5.7.2-0.3

Source reference: /affected/1/versions

5.7.2-0.4

Source reference: /affected/1/versions

5.8.2-1

Source reference: /affected/1/versions

5.8.2-1.1

Source reference: /affected/1/versions

5.8.2-1.2

Source reference: /affected/1/versions

5.8.4-1

Source reference: /affected/1/versions

5.9.0-0.1

Source reference: /affected/1/versions

5.9.0-0.2

Source reference: /affected/1/versions

5.9.1-0.1

Source reference: /affected/1/versions

5.9.2-1

Source reference: /affected/1/versions

Fixed versions
Not stated in this record
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": "wolfssl",
      "purl": "pkg:deb/debian/wolfssl?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "5.5.4-2",
      "5.5.4-2+deb12u1",
      "5.5.4-2+deb12u2",
      "5.5.4-2+deb12u3",
      "5.5.4-2.1",
      "5.6.4-1",
      "5.6.4-2",
      "5.6.6-1",
      "5.6.6-1.1",
      "5.6.6-1.2",
      "5.6.6-1.3",
      "5.6.6-1.3~exp1",
      "5.7.0-0.1",
      "5.7.0-0.2",
      "5.7.0-0.3",
      "5.7.2-0.1",
      "5.7.2-0.2",
      "5.7.2-0.3",
      "5.7.2-0.4",
      "5.8.2-1",
      "5.8.2-1.1",
      "5.8.2-1.2",
      "5.8.4-1",
      "5.9.0-0.1",
      "5.9.0-0.2",
      "5.9.1-0.1",
      "5.9.2-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-5504.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "wolfssl",
      "purl": "pkg:deb/debian/wolfssl?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "5.7.2-0.1",
      "5.7.2-0.1+deb13u1",
      "5.7.2-0.1+deb13u2",
      "5.7.2-0.2",
      "5.7.2-0.3",
      "5.7.2-0.4",
      "5.8.2-1",
      "5.8.2-1.1",
      "5.8.2-1.2",
      "5.8.4-1",
      "5.9.0-0.1",
      "5.9.0-0.2",
      "5.9.1-0.1",
      "5.9.2-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-5504.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#57833 · Revision 1
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Publisher date
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