{"id":"CVE-2025-6998","summary":"Calibre Web 0.6.24 & Autocaliweb 0.7.0 - ReDoS","details":"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.","aliases":["GHSA-2g7m-ph9x-7q7m","PYSEC-2026-1228"],"modified":"2026-08-12T03:51:45.030912887Z","published":"2025-07-24T19:39:17.709Z","database_specific":{"cna_assigner":"Fluid Attacks","cwe_ids":["CWE-1333"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/6xxx/CVE-2025-6998.json"},"references":[{"type":"ADVISORY","url":"https://fluidattacks.com/advisories/megadeth"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/6xxx/CVE-2025-6998.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-6998"},{"type":"PACKAGE","url":"https://github.com/gelbphoenix/autocaliweb"},{"type":"PACKAGE","url":"https://github.com/janeczku/calibre-web"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/gelbphoenix/autocaliweb","events":[{"introduced":"35dece44cbf4ca715be07f4d62b95f0391491ac0"},{"fixed":"84477b55caff47e54d93384015fa694b6eb9b5be"}],"database_specific":{"source":["AFFECTED_FIELD","DESCRIPTION"],"extracted_events":[{"introduced":"0.7.0"},{"fixed":"0.7.1"}]}},{"type":"GIT","repo":"https://github.com/janeczku/calibre-web","events":[{"introduced":"0af52f205358b0147ee3430f9e6c8fe007c0ea77"},{"last_affected":"0af52f205358b0147ee3430f9e6c8fe007c0ea77"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"0.6.24"},{"last_affected":"0.6.24"}]}}],"versions":["0.6.24","v0.7.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-6998.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}