Vulnerability in Pig-Mesh Pig
CVE-2026-91995
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 with an incorrect current password to overwrite any account credential including the admin account and gain full administrative control.
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
Affected products
Weakness classification (CWE)
References
- disclosure@vulncheck.com (exploit, third-party-advisory)
- disclosure@vulncheck.com (issue-tracking)
- disclosure@vulncheck.com (patch)
- disclosure@vulncheck.com (technical-description)
- disclosure@vulncheck.com (technical-description)
- disclosure@vulncheck.com (product)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-91995?
- CVE-2026-91995 is a critical-severity vulnerability in Pig-Mesh Pig, classified under CWE-620. CVSS score: 9.1/10. Published 2026-09-15.
- How severe is CVE-2026-91995?
- Critical severity. CVSS v3 base score is 9.1 out of 10.