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DEBIAN-CVE-2026-27888

Type: advisorySource: OSV1 source record

pypdf is a free and open-source pure-python PDF library. Prior to 6.7.3, an attacker who uses this vulnerability can craft a PDF which leads to the RAM being exhausted. This requires accessing the `xfa` property of a reader or writer and the corresponding stream being compressed using `/FlateDecode`. This has been fixed in pypdf 6.7.3. As a workaround, apply the patch manually.

Announced Group revision 1
Original source ↗

DEBIAN-CVE-2026-27888

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-2026-27888

pypdf

Source reference: /affected/0/package/name

Affected versions
3.17.4-1

Source reference: /affected/0/versions

3.4.1-1

Source reference: /affected/0/versions

3.4.1-1+deb12u1

Source reference: /affected/0/versions

4.0.0-1

Source reference: /affected/0/versions

4.0.0-1~exp1

Source reference: /affected/0/versions

4.0.1-1

Source reference: /affected/0/versions

4.0.2-1

Source reference: /affected/0/versions

4.1.0-1

Source reference: /affected/0/versions

4.2.0-1

Source reference: /affected/0/versions

4.3.1-1

Source reference: /affected/0/versions

5.4.0-1

Source reference: /affected/0/versions

6.19.0-1

Source reference: /affected/0/versions

6.9.0-1

Source reference: /affected/0/versions

6.9.2-1

Source reference: /affected/0/versions

6.9.2-2

Source reference: /affected/0/versions

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

pypdf

Source reference: /affected/1/package/name

Affected versions
5.4.0-1

Source reference: /affected/1/versions

6.19.0-1

Source reference: /affected/1/versions

6.9.0-1

Source reference: /affected/1/versions

6.9.2-1

Source reference: /affected/1/versions

6.9.2-2

Source reference: /affected/1/versions

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

pypdf

Source reference: /affected/2/package/name

Affected versions
5.4.0-1

Source reference: /affected/2/versions

Fixed versions
6.9.0-1

Source reference: /affected/2/ranges

Prerequisites
Not stated in this record

pypdf2

Source reference: /affected/3/package/name

Affected versions
2.12.1-3

Source reference: /affected/3/versions

2.12.1-3+deb12u1

Source reference: /affected/3/versions

2.12.1-4

Source reference: /affected/3/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": "pypdf",
      "purl": "pkg:deb/debian/pypdf?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "3.17.4-1",
      "3.4.1-1",
      "3.4.1-1+deb12u1",
      "4.0.0-1",
      "4.0.0-1~exp1",
      "4.0.1-1",
      "4.0.2-1",
      "4.1.0-1",
      "4.2.0-1",
      "4.3.1-1",
      "5.4.0-1",
      "6.19.0-1",
      "6.9.0-1",
      "6.9.2-1",
      "6.9.2-2"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-27888.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "pypdf",
      "purl": "pkg:deb/debian/pypdf?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "5.4.0-1",
      "6.19.0-1",
      "6.9.0-1",
      "6.9.2-1",
      "6.9.2-2"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-27888.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "6.9.0-1"
          }
        ]
      }
    ],
    "package": {
      "name": "pypdf",
      "purl": "pkg:deb/debian/pypdf?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "5.4.0-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-27888.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "pypdf2",
      "purl": "pkg:deb/debian/pypdf2?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "2.12.1-3",
      "2.12.1-3+deb12u1",
      "2.12.1-4"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-27888.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#56326 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement

Revision history

  1. DEBIAN-CVE-2026-27888 · Revision 1Source updated