Authentication Bypass by Primary Weakness in MantisBT - CVE-2026-30849
Published: November 6, 2026
Vulnerability identifier: #VU159793
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-30849
CWE-ID: CWE-305
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows an unauthenticated remote attacker to bypass authentication and execute SOAP API functions with the permissions of a victim's account.
The vulnerability exists due to improper password parameter type checking in the MantisBT SOAP API when MySQL or a compatible database performs implicit string-to-integer conversion. An unauthenticated remote attacker can submit a crafted SOAP envelope containing a known victim username to authenticate without knowing the victim's password.
Affected software
MantisBT
How to mitigate CVE-2026-30849
Install security update from vendor's website.
MantisBT - update to 2.28.1