{"id":"CVE-2026-91995","title":"pig before 4.1.0 contains an authentication bypass vulnerability in the /register/password endpoint where password verification results are discarded, allowing any value as the current password","summary":"pig before 4.1.0 contains an authentication bypass vulnerability in the /register/password endpoint where password verification results are discarded, allowing any value as the current password. Remote attackers can submit a username wit…","severity":"critical","cvss":9.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","cwe":["CWE-620"],"vendor":"pig-mesh","product":"pig","affected":["pig < 4.1.0"],"published":"2026-09-15","updated":"2026-09-18","sourceUpdated":"2026-09-18T18:18:06.243","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-91995","references":[{"url":"https://github.com/geo-chen/oss/blob/main/pig.md","label":"disclosure@vulncheck.com"},{"url":"https://github.com/pig-mesh/pig","label":"disclosure@vulncheck.com"},{"url":"https://github.com/pig-mesh/pig/blob/v4.0.0/pig-upms/pig-upms-biz/src/main/java/com/pig4cloud/pig/admin/controller/SysRegisterController.java#L21-L53","label":"disclosure@vulncheck.com"},{"url":"https://github.com/pig-mesh/pig/blob/v4.0.0/pig-upms/pig-upms-biz/src/main/java/com/pig4cloud/pig/admin/service/impl/SysUserServiceImpl.java#L650-L669","label":"disclosure@vulncheck.com"},{"url":"https://github.com/pig-mesh/pig/commit/ce958668f399110b97b3f1fcc5f517ff9bcfd535","label":"disclosure@vulncheck.com"},{"url":"https://github.com/pig-mesh/pig/issues/1249","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/pig-before-4.1.0-unverified-password-change-via-register-password","label":"disclosure@vulncheck.com"}],"tags":["nvd","cve.org"],"epss":0.00608,"epssPercentile":0.47487,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-09-18T17:15:18.219296Z"},"ingestedAt":"2026-09-15T12:36:50.173Z","slug":"CVE-2026-91995","body":"## Overview\n\npig before 4.1.0 contains an authentication bypass vulnerability in the /register/password endpoint where password verification results are discarded, allowing any value as the current password. Remote attackers can submit a username with an incorrect current password to overwrite any account credential including the admin account and gain full administrative control.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":50,"depthScoreParts":{"impact":50.1,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}