Uncontrolled recursion in expr - CVE-2025-68156
Published: December 22, 2025
Vulnerability identifier: #VU120232
CSH Severity: Medium
CVSS v4.0: 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/E:U/U:Green
CVE-ID: CVE-2025-68156
CWE-ID: CWE-674
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: The Expr Expression Language
Affected software:
expr
expr
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a denial of service attack.
The vulnerability exists due to uncontrolled recursion within the flatten, min, max, mean, and median function. A remote attacker can pass specially crafted input to the application and perform a denial of service attack.
How to mitigate CVE-2025-68156
Install updates from vendor's website.