CVEvulnerability
CVE-2021-44686
7.5 HIGH
Official page ↗
- Status
- Modified
- Published
- 2021-12-07
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS 2.0 ([email protected])
- 5.0 MEDIUM — AV:N/AC:L/Au:N/C:N/I:N/A:P
- Weaknesses
- CWE-400
Description
calibre before 5.32.0 contains a regular expression that is vulnerable to ReDoS (Regular Expression Denial of Service) in html_preprocess_rules in ebooks/conversion/preprocess.py.
Affected configurations
• calibre-ebook calibre (< 5.32.0)
• fedoraproject fedora 34
Related
Weakness · CWE (1)
- CWE-400 Uncontrolled Resource Consumption weakness
References
- https://bugs.launchpad.net/calibre/+bug/1951979 Exploit, Issue Tracking, Vendor Advisory
- https://github.com/dwisiswant0/advisory/issues/18 Exploit, Issue Tracking, Patch, Third Party Advisory
- https://github.com/kovidgoyal/calibre/compare/v5.31.1...v5.32.0 Patch, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W7QKFPYJ23KG6WJ5NIYAM4N2NWZCLQGL/ lists.fedoraproject.org
- https://bugs.launchpad.net/calibre/+bug/1951979 Exploit, Issue Tracking, Vendor Advisory
- https://github.com/dwisiswant0/advisory/issues/18 Exploit, Issue Tracking, Patch, Third Party Advisory
- https://github.com/kovidgoyal/calibre/compare/v5.31.1...v5.32.0 Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2024/09/msg00005.html lists.debian.org
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W7QKFPYJ23KG6WJ5NIYAM4N2NWZCLQGL/ lists.fedoraproject.org