CVE-2026-23836 PUBLISHED

HotCRP vulnerable to remote code execution through formulas

Assigner: GitHub_M
Reserved: 16.01.2026 Published: 19.01.2026 Updated: 20.01.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CVSS Score: 10

Attack Vector	Network	Scope	Changed
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	Low	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	kohler
Product	hotcrp
Versions	Version = 3.1 is affected

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

Problem Types

CWE-20: Improper Input Validation CWE