ubuntu-cve-2026-33205
Vulnerability from osv_ubuntu
Published
2026-03-27 15:16
Modified
2026-05-20 15:27
Summary
Details

calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Prior to version 9.6.0, a Server-Side Request Forgery vulnerability in the background-image endpoint of calibre e-book reader's web view allows an attacker to perform blind GET requests to arbitrary URLs and exfiltrate information out from the ebook sandbox. Version 9.6.0 patches the issue.

Severity
4.8 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
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. Prior to version 9.6.0, a Server-Side Request Forgery vulnerability in the background-image endpoint of calibre e-book reader\u0027s web view allows an attacker to perform blind GET requests to arbitrary URLs and exfiltrate information out from the ebook sandbox. Version 9.6.0 patches the issue.",
  "id": "UBUNTU-CVE-2026-33205",
  "modified": "2026-05-20T15:27:21Z",
  "published": "2026-03-27T15:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-33205"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-33205"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/kovidgoyal/calibre/security/advisories/GHSA-4926-v9px-wv7v"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    },
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-33205"
  ]
}



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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.