{"id":"CVE-2025-6998","aliases":["EUVD-2025-22540","GHSA-2g7m-ph9x-7q7m","PYSEC-2026-1228"],"status":"published","title":"Calibre Web 0.6.24 \u0026 Autocaliweb 0.7.0 - ReDoS","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.","severity":{"version":"4.0","score":8.7,"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00958,"percentile":0.61955,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-1333"],"published":"2025-07-24T19:39:17Z","modified":"2026-10-28T02:31:00Z","exploits":[{"source":"pocgithub","id":"mind2hex/CVE-2025-6998-CalibreWeb-0.6.24-ReDoS","title":"mind2hex/CVE-2025-6998-CalibreWeb-0.6.24-ReDoS","date":"2025-07-27","url":"https://github.com/mind2hex/CVE-2025-6998-CalibreWeb-0.6.24-ReDoS"}],"affected":[{"source":"ghsa","ecosystem":"PyPI","package":"calibreweb","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"0.6.24"}]}]},{"source":"osv","ecosystem":"PyPI","package":"calibreweb","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"0.6.24"}]}],"versions":["0.6.12","0.6.13","0.6.14","0.6.15","0.6.16","0.6.17","0.6.18","0.6.19","0.6.20","0.6.21","0.6.22","0.6.23","0.6.24"]},{"source":"osv","ecosystem":"PyPI","package":"calibreweb","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"0.6.24"}]}],"versions":["0.6.12","0.6.13","0.6.14","0.6.15","0.6.16","0.6.17","0.6.18","0.6.19","0.6.20","0.6.21","0.6.22","0.6.23","0.6.24"]}],"products":[{"vendor":"autocaliweb","product":"autocaliweb"},{"vendor":"calibre web","product":"calibre web"},{"vendor":"gelbphoenix","product":"autocaliweb"}],"references":[{"url":"https://fluidattacks.com/advisories/megadeth","tags":["third-party-advisory","advisory","web"]},{"url":"https://github.com/janeczku/calibre-web","tags":["product","package"]},{"url":"https://github.com/gelbphoenix/autocaliweb","tags":["product","package","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-6998","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-2g7m-ph9x-7q7m","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/6xxx/CVE-2025-6998.json","tags":["advisory"]},{"url":"https://pypi.org/project/calibreweb","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2025-6998","title":"Calibre Web 0.6.24 \u0026 Autocaliweb 0.7.0 - ReDoS","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.","status":"published","published":"2025-07-24T19:39:17.709Z","modified":"2025-07-25T13:17:33.295Z","cvss":[{"version":"4.0","score":8.7,"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","level":"high","assessor":"cna"}],"cwes":["CWE-1333"],"updated_at":"2026-11-02T14:32:40.419293Z"}],"euvd":[{"id":"EUVD-2025-22540","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.","status":"published","published":"2025-07-24T19:39:17Z","modified":"2025-07-25T13:17:33Z","cvss":[{"version":"4.0","score":8.7,"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","level":"high"}],"updated_at":"2026-11-02T20:32:04.291169Z"}],"ghsa":[{"id":"GHSA-2g7m-ph9x-7q7m","title":"Calibre Web and Autocaliweb have a ReDoS vulnerability","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.","status":"published","published":"2025-07-24T21:30:39Z","modified":"2025-07-28T14:53:48Z","cvss":[{"version":"4.0","score":8.7,"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","level":"high"}],"cwes":["CWE-1333"],"updated_at":"2026-11-02T14:38:51.864708Z"}],"nvd":[{"id":"CVE-2025-6998","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.","status":"published","published":"2025-07-24T20:15:27.013Z","modified":"2026-06-17T10:03:01.067Z","cvss":[{"version":"4.0","score":8.7,"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"}],"cwes":["CWE-1333"],"updated_at":"2026-11-02T14:11:21.132141Z"}],"osv":[{"id":"CVE-2025-6998","title":"Calibre Web 0.6.24 \u0026 Autocaliweb 0.7.0 - ReDoS","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.","status":"published","published":"2025-07-24T19:39:17.709Z","modified":"2026-10-28T02:31:00.019706612Z","cvss":[{"version":"4.0","score":8.7,"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","level":"high"}],"cwes":["CWE-1333"],"updated_at":"2026-11-02T15:44:52.859856Z"},{"id":"GHSA-2g7m-ph9x-7q7m","title":"Calibre Web and Autocaliweb have a ReDoS vulnerability","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.","status":"published","published":"2025-07-24T21:30:39Z","modified":"2026-07-07T17:56:44.214741721Z","cvss":[{"version":"4.0","score":8.7,"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","level":"high"}],"cwes":["CWE-1333"],"updated_at":"2026-11-02T15:46:34.338541Z"},{"id":"PYSEC-2026-1228","title":"Calibre Web and Autocaliweb have a ReDoS vulnerability","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.","status":"published","published":"2026-07-07T16:02:58.600303Z","modified":"2026-07-07T17:47:33.602867981Z","cvss":[{"version":"4.0","score":8.7,"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","level":"high"}],"updated_at":"2026-11-02T15:52:54.622769Z"}]}}