PYSEC-2026-1228

vendorUSosv

Calibre Web and Autocaliweb have a ReDoS vulnerability

view advisory published 2026-07-07Licence: CC-BY-4.0

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.

describes (1)

Related CVEs.

ID	severity	EPSS	exploitable	published
CVE-2025-6998US	—	0.96% (61st)	Exploit	2025-07-24
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 crafte…

references

External citations — patches, advisories, analysis.

https://fluidattacks.com/advisories/megadethWEB
https://github.com/advisories/GHSA-2g7m-ph9x-7q7mADVISORY
https://github.com/gelbphoenix/autocaliwebWEB
https://github.com/janeczku/calibre-webPACKAGE
https://nvd.nist.gov/vuln/detail/CVE-2025-6998ADVISORY
https://pypi.org/project/calibrewebPACKAGE

scry

Advisories like this name the exposed products attackers go after on your perimeter. See what is exposed on your perimeter with a free passive scan.

Free scan