CVE-2026-23836

HotCRP vulnerable to remote code execution through formulas

State: Published
Severity: 10.0 Critical
Published: Jan 19, 2026
Updated: Jan 20, 2026
Reserved: Jan 16, 2026

Description

HotCRP is conference review software. A problem introduced in April 2024 in version 3.1 led to inadequately sanitized code generation for HotCRP formulas which allowed users to trigger the execution of arbitrary PHP code. The problem is patched in release version 3.2.

Scores

CVSS	Score	Vector	Source
3.1	10.0 Critical	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H	GitHub_M

Weaknesses

CWE-20 Improper Input Validation

Affected Products

Product	Versions
hotcrpkohler	= 3.1Affected

References

https://github.com/kohler/hotcrp/security/advisories/GHSA-hpqh-j6qx-x57h
https://github.com/kohler/hotcrp/commit/4674fcfbb76511072a1145dad620756fc1d4b4e9
https://github.com/kohler/hotcrp/commit/bfc7e0db15df6ed6d544a639020d2ce05a5f0834

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