GHSA-2g7m-ph9x-7q7m

Calibre Web and Autocaliweb have a ReDoS vulnerability

Source: GitHub Advisory Database (reviewed) High CVE-2025-6998

Packages

Ecosystem	Package	Affected	Fixed in
PyPI	calibreweb	<= 0.6.24	no fix listed

Details

As written in the advisory (Markdown source, shown as plain text).

ReDoS in strip_whitespaces() function in cps/string_helper.py in Calibre Web and Autocaliweb allows unauthenticated remote attackers to cause denial of service via specially crafted username parameter that triggers catastrophic backtracking during login. This issue affects Calibre Web: 0.6.24 (Nicolette); Autocaliweb: from 0.7.0 before 0.7.1.

References

External links from the advisory. They lead to third-party sites.

https://nvd.nist.gov/vuln/detail/CVE-2025-6998 advisory
https://fluidattacks.com/advisories/megadeth web
https://github.com/gelbphoenix/autocaliweb web
https://github.com/janeczku/calibre-web package