Live › vulnerability › CVE-2026-55493
HotCRP, a conference review application, has a search flaw in its cmt: term starting at version 2.101. A signed-in user with search access can infer who wrote an anonymous review comment, breaking reviewer anonymity.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-30 20:25 UTC. All times on this page are UTC.
Only HotCRP installations running version 2.101 or later that allow users to run comment searches are exposed. The attacker must already have an account with search access, and the flaw affects reviewer anonymity rather than system control. Installations on earlier versions or without user accounts can skip it.
No product ranges from the sources yet.
git describe --tags in the HotCRP directory.3.3 per the advisory prose and repository tag; the advisory's patched-version metadata lists 3.3.1, so the sources conflict. Confirm against the upstream release notes before relying on either.Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
HotCRP is conference review software. Starting with 2.101, the cmt: search term checks whether a comment is visible to the searching user but fails to check whether the commenter's identity should be visible. A cmt:USER search can therefore match a paper with a visible comment authored by USER even when the comment is supposed to be anonymous. An authenticated user with access to the search can infer the author of an anonymous comment, compromising reviewer anonymity. Comments that the user cannot see remain excluded from search results. The advisory prose identifies 3.3 as fixed, its affected-version metadata excludes 3.3, and the verified repository tag 3.3 already contains the identity-check fix; however, its patched-version metadata instead lists 3.3.1. This fixed-version source conflict remains unresolved.
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