{"id":"CVE-2021-32837","aliases":["DEBIAN-CVE-2021-32837","DLA-3460-1","DLA-4418-1","EUVD-2023-0144","GHSA-g3pv-pj5f-3hfq","MGASA-2023-0036","PYSEC-2023-25","UBUNTU-CVE-2021-32837","openSUSE-SU-2023:0030-1","openSUSE-SU-2024:12621-1","openSUSE-SU-2025:15098-1"],"status":"published","title":"mechanize vulnerable to ReDoS","description":"mechanize, a library for automatically interacting with HTTP web servers, contains a regular expression that is vulnerable to regular expression denial of service (ReDoS) prior to version 0.4.6. If a web server responds in a malicious way, then mechanize could crash. 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Advisory","evidence","web","report"]},{"url":"https://github.com/python-mechanize/mechanize/releases/tag/v0.4.6","tags":["x_transferred","Third Party Advisory","advisory","web","report"]},{"url":"https://github.com/python-mechanize/mechanize/commit/dd05334448e9f39814bab044d2eaa5ef69b410d6","tags":["x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://lists.debian.org/debian-lts-announce/2023/06/msg00022.html","tags":["mailing-list","x_transferred","web"]},{"url":"https://lists.debian.org/debian-lts-announce/2025/12/msg00028.html","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-32837","tags":["advisory"]},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/mechanize/PYSEC-2023-25.yaml","tags":["web"]},{"url":"https://securitylab.github.com/advisories/GHSL-2021-108-python-mechanize-mechanize","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-g3pv-pj5f-3hfq","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2021-32837","tags":["advisory"]},{"url":"https://github.com/python-mechanize/mechanize","tags":["package"]},{"url":"https://advisories.mageia.org/MGASA-2023-0036.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=31450","tags":["report"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/UJMENNGUMOIJQDKIMSMKR4ZGHVXN6F4U/","tags":["web","advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-32837","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-32837","tags":["report"]},{"url":"https://bugzilla.suse.com/1202003","tags":["report"]},{"url":"https://bugzilla.suse.com/1207242","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2021-32837","tags":["web"]},{"url":"","tags":["advisory"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/ALVMKGJWEWB5TB7PXYN2YHAGDNLAFVMJ/","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2021-32837","title":"mechanize vulnerable to ReDoS","description":"mechanize, a library for automatically interacting with HTTP web servers, contains a regular expression that is vulnerable to regular expression denial of service (ReDoS) prior to version 0.4.6. If a web server responds in a malicious way, then mechanize could crash. Version 0.4.6 has a patch for the issue.","status":"published","published":"2023-01-17T00:00:00Z","modified":"2025-12-22T01:32:19.985Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-1333"],"updated_at":"2026-11-02T14:33:07.014772Z"}],"euvd":[{"id":"EUVD-2023-0144","description":"mechanize, a library for automatically interacting with HTTP web servers, contains a regular expression that is vulnerable to regular expression denial of service (ReDoS) prior to version 0.4.6. If a web server responds in a malicious way, then mechanize could crash. Version 0.4.6 has a patch for the issue.","status":"published","published":"2023-01-17T00:00:00Z","modified":"2025-12-22T01:32:19Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T19:49:02.188903Z"}],"ghsa":[{"id":"GHSA-g3pv-pj5f-3hfq","title":"mechanize Regular Expression Denial of Service vulnerability","description":"mechanize, a library for automatically interacting with HTTP web servers, contains a regular expression that is vulnerable to regular expression denial of service (ReDoS) prior to version 0.4.6. If a web server responds in a malicious way, then mechanize could crash. Version 0.4.6 has a patch for the issue.","status":"published","published":"2023-01-18T00:30:18Z","modified":"2025-12-22T16:31:05Z","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"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-1333"],"updated_at":"2026-11-02T14:39:14.093341Z"}],"nvd":[{"id":"CVE-2021-32837","description":"mechanize, a library for automatically interacting with HTTP web servers, contains a regular expression that is vulnerable to regular expression denial of service (ReDoS) prior to version 0.4.6. If a web server responds in a malicious way, then mechanize could crash. Version 0.4.6 has a patch for the issue.","status":"published","published":"2023-01-17T22:15:10.533Z","modified":"2026-06-17T03:53:43.88Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-1333"],"updated_at":"2026-11-02T14:07:07.323379Z"}],"osv":[{"id":"CVE-2021-32837","description":"mechanize, a library for automatically interacting with HTTP web servers, contains a regular expression that is vulnerable to regular expression denial of service (ReDoS) prior to version 0.4.6. If a web server responds in a malicious way, then mechanize could crash. Version 0.4.6 has a patch for the issue.","status":"published","published":"2023-01-17T22:15:10.533Z","modified":"2026-10-24T10:51:25.10771059Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:19.793849Z"},{"id":"DEBIAN-CVE-2021-32837","description":"mechanize, a library for automatically interacting with HTTP web servers, contains a regular expression that is vulnerable to regular expression denial of service (ReDoS) prior to version 0.4.6. If a web server responds in a malicious way, then mechanize could crash. Version 0.4.6 has a patch for the issue.","status":"published","published":"2023-01-17T22:15:10.533Z","modified":"2026-10-23T18:03:14.463992439Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:35.233346Z"},{"id":"GHSA-g3pv-pj5f-3hfq","title":"mechanize Regular Expression Denial of Service vulnerability","description":"mechanize, a library for automatically interacting with HTTP web servers, contains a regular expression that is vulnerable to regular expression denial of service (ReDoS) prior to version 0.4.6. If a web server responds in a malicious way, then mechanize could crash. 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