ubuntu-cve-2026-26065
Vulnerability from osv_ubuntu
Published
2026-02-20 02:16
Modified
2026-05-20 15:26
Summary
Details

calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Versions 9.2.1 and below are vulnerable to Path Traversal through PDB readers (both 132-byte and 202-byte header variants) that allow arbitrary file writes with arbitrary extension and arbitrary content anywhere the user has write permissions. Files are written in 'wb' mode, silently overwriting existing files. This can lead to potential code execution and Denial of Service through file corruption. This issue has been fixed in version 9.3.0.

Severity
9.3 (Critical)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "calibre",
            "binary_version": "2.55.0+dfsg-1ubuntu0.2"
          },
          {
            "binary_name": "calibre-bin",
            "binary_version": "2.55.0+dfsg-1ubuntu0.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "calibre",
        "purl": "pkg:deb/ubuntu/calibre@2.55.0+dfsg-1ubuntu0.2?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.33.0+dfsg-1build1",
        "2.38.0+dfsg-1",
        "2.45.0+dfsg-1",
        "2.45.0+dfsg-1build1",
        "2.48.0+dfsg-1",
        "2.48.0+dfsg-1build1",
        "2.54.0+dfsg-1",
        "2.55.0+dfsg-1",
        "2.55.0+dfsg-1ubuntu0.2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "calibre",
            "binary_version": "3.21.0+dfsg-1build1"
          },
          {
            "binary_name": "calibre-bin",
            "binary_version": "3.21.0+dfsg-1build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "calibre",
        "purl": "pkg:deb/ubuntu/calibre@3.21.0+dfsg-1build1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.7.0+dfsg-2",
        "3.7.0+dfsg-2build1",
        "3.12.0+dfsg-1",
        "3.13.0+dfsg-1",
        "3.14.0+dfsg-1",
        "3.15.0.1+dfsg-1",
        "3.16.0+dfsg-1",
        "3.16.0+dfsg-1build1",
        "3.17.0+dfsg-1",
        "3.17.0+dfsg-2",
        "3.18.0+dfsg-1build1",
        "3.19.0+dfsg-1",
        "3.20.0+dfsg-1",
        "3.21.0+dfsg-1",
        "3.21.0+dfsg-1build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "calibre",
            "binary_version": "4.99.4+dfsg+really4.12.0-1ubuntu1"
          },
          {
            "binary_name": "calibre-bin",
            "binary_version": "4.99.4+dfsg+really4.12.0-1ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "calibre",
        "purl": "pkg:deb/ubuntu/calibre@4.99.4+dfsg+really4.12.0-1ubuntu1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.46.0+dfsg-1",
        "4.2.0+dfsg-2",
        "4.3.0+dfsg-1",
        "4.3.0+dfsg-2",
        "4.4.0+dfsg-1",
        "4.5.0+dfsg-1",
        "4.5.0+dfsg-2",
        "4.5.0+dfsg-3",
        "4.6.0+dfsg-1",
        "4.7.0+dfsg-1",
        "4.99.3+dfsg-2",
        "4.99.4+dfsg-1",
        "4.99.4+dfsg-1build1",
        "4.99.4+dfsg+really4.10.0+py3-2",
        "4.99.4+dfsg+really4.11.2-1",
        "4.99.4+dfsg+really4.11.2-1build1",
        "4.99.4+dfsg+really4.12.0-1",
        "4.99.4+dfsg+really4.12.0-1build1",
        "4.99.4+dfsg+really4.12.0-1ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "calibre",
            "binary_version": "5.37.0+dfsg-1build1"
          },
          {
            "binary_name": "calibre-bin",
            "binary_version": "5.37.0+dfsg-1build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "calibre",
        "purl": "pkg:deb/ubuntu/calibre@5.37.0+dfsg-1build1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.25.0+dfsg-2",
        "5.33.2+dfsg-1",
        "5.34.0+dfsg-1",
        "5.35.0+dfsg-1ubuntu2",
        "5.37.0+dfsg-1",
        "5.37.0+dfsg-1build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "calibre",
            "binary_version": "7.6.0+ds-1build1"
          },
          {
            "binary_name": "calibre-bin",
            "binary_version": "7.6.0+ds-1build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "calibre",
        "purl": "pkg:deb/ubuntu/calibre@7.6.0+ds-1build1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.24.0+ds-1",
        "6.29.0+ds-1",
        "7.0.0+ds-1",
        "7.1.0+ds-1",
        "7.1.0+ds-2",
        "7.2.0+ds-1",
        "7.2.0+ds-1build1",
        "7.3.0+ds-1",
        "7.4.0+ds-1",
        "7.5.1+ds-1",
        "7.5.1+ds-2",
        "7.5.1+ds-3",
        "7.6.0+ds-1",
        "7.6.0+ds-1build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "calibre",
            "binary_version": "8.8.0+ds-3build1"
          },
          {
            "binary_name": "calibre-bin",
            "binary_version": "8.8.0+ds-3build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "calibre",
        "purl": "pkg:deb/ubuntu/calibre@8.8.0+ds-3build1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "7.26.0+ds-4build1",
        "8.3.0+ds-1",
        "8.4.0+ds-1",
        "8.5.0+ds-1",
        "8.6.0+ds-1",
        "8.7.0+ds-1",
        "8.8.0+ds-2",
        "8.8.0+ds-3",
        "8.8.0+ds-3build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "calibre",
            "binary_version": "9.2.1+ds+~0.10.5-2build1"
          },
          {
            "binary_name": "calibre-bin",
            "binary_version": "9.2.1+ds+~0.10.5-2build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "calibre",
        "purl": "pkg:deb/ubuntu/calibre@9.2.1+ds+~0.10.5-2build1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "8.8.0+ds-3build1",
        "8.13.0+ds+~0.10.5-3",
        "8.14.0+ds+~0.10.5-1",
        "8.15.0+ds+~0.10.5-1",
        "8.16.0+ds+~0.10.5-2",
        "8.16.2+ds+~0.10.5-1",
        "8.16.2+ds+~0.10.5-2",
        "8.16.2+ds+~0.10.5-3",
        "9.2.1+ds+~0.10.5-2build1"
      ]
    }
  ],
  "aliases": [],
  "details": "calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Versions 9.2.1 and below are vulnerable to Path Traversal through PDB readers (both 132-byte and 202-byte header variants) that allow arbitrary file writes with arbitrary extension and arbitrary content anywhere the user has write permissions. Files are written in \u0027wb\u0027 mode, silently overwriting existing files. This can lead to potential code execution and Denial of Service through file corruption. This issue has been fixed in version 9.3.0.",
  "id": "UBUNTU-CVE-2026-26065",
  "modified": "2026-05-20T15:26:06Z",
  "published": "2026-02-20T02:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-26065"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-26065"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/kovidgoyal/calibre/security/advisories/GHSA-vmfh-7mr7-pp2w"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/kovidgoyal/calibre/commit/b6da1c3878c06eb1356cb0ec1106cb66e0e9bfb8"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
      "type": "CVSS_V4"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-26065"
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.