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.
Advisories
Source ID Title
Debian DLA Debian DLA DLA-3862-1 calibre security update
EUVD EUVD EUVD-2021-31502 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.
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Tue, 04 Nov 2025 16:30:00 +0000

Type Values Removed Values Added
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2025-11-04T16:09:27.961Z

Reserved: 2021-12-06T00:00:00.000Z

Link: CVE-2021-44686

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2021-12-07T00:15:08.087

Modified: 2025-11-04T16:15:45.927

Link: CVE-2021-44686

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.