Operation on a Resource after Expiration or Release in Parse Server - CVE-2026-31875
Published: April 6, 2026
Vulnerability identifier: #VU124997
CSH Severity: Medium
CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-31875
CWE-ID: CWE-672
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to repeatedly authenticate as an affected user.
The vulnerability exists due to operation on a resource after expiration or release in the MFA recovery code handling logic when validating recovery codes during login. A remote attacker can use an obtained recovery code multiple times to repeatedly authenticate as an affected user.
The issue affects accounts with TOTP-based multi-factor authentication enabled, and exploitation requires obtaining a valid recovery code.
Affected software
Parse Server
How to mitigate CVE-2026-31875
Install security update from vendor's website.
Parse Server - addressed in versions 8.6.33, 9.6.0 alpha.7