PHP
CVE-2026-23836
CRITICAL
Severity by source
AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
Lifecycle Timeline
3DescriptionGitHub Advisory
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.
AnalysisAI
HotCRP conference review software version 3.1 has an inadequate input sanitization flaw (CVSS 9.9) that allows authenticated users to execute arbitrary code on the server through crafted submissions.
Technical ContextAI
A regression introduced in April 2024 in HotCRP 3.1 led to inadequately sanitized content (CWE-20), allowing authenticated users to inject and execute code through the conference paper submission or review system.
RemediationAI
Update HotCRP to the patched version. Review submitted content for suspicious payloads.
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Same weakness CWE-20 – Improper Input Validation
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External POC / Exploit Code
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