{"cve":"CVE-2025-6998","nvd":{"published":"2025-07-24T20:15:27.013","modified":"2026-06-17T10:03:01.067","status":"Deferred","description":"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.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":8.7},"cvss_v3":null,"cwes":["CWE-1333"],"references":["https://fluidattacks.com/advisories/megadeth","https://github.com/gelbphoenix/autocaliweb","https://github.com/janeczku/calibre-web"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:05:46.678065081+00:00"},"epss":{"cve":"CVE-2025-6998","score":0.00958,"percentile":0.61499,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-2g7m-ph9x-7q7m","url":"https://osv.dev/vulnerability/GHSA-2g7m-ph9x-7q7m","summary":"Calibre Web and Autocaliweb have a ReDoS vulnerability","modified":"2026-07-07T17:56:44.214741721Z","packages":[{"ecosystem":"PyPI","name":"calibreweb","purl":"pkg:pypi/calibreweb","ranges":["<=0.6.24"],"fixed":[]}]},{"id":"PYSEC-2026-1228","url":"https://osv.dev/vulnerability/PYSEC-2026-1228","summary":"Calibre Web and Autocaliweb have a ReDoS vulnerability","modified":"2026-07-07T17:47:33.602867981Z","packages":[{"ecosystem":"PyPI","name":"calibreweb","purl":"pkg:pypi/calibreweb","ranges":["<=0.6.24"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}