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Description

Claude HUD through 0.0.12, patched in commit 234d9aa, contains a path traversal vulnerability that allows attackers to read arbitrary files by supplying an unvalidated transcript_path value via stdin JSON. Attackers can access any file readable by the process and the file metadata is written to a persistent cache file with insufficient permissions, creating a forensic record of accessed paths that survives process exit.

PUBLISHED Reserved 2026-05-18 | Published 2026-05-18 | Updated 2026-05-18 | Assigner VulnCheck




MEDIUM: 4.8CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

LOW: 3.3CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Problem types

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Product status

Default status
affected

Any version
affected

234d9aad919b51326a43bcf90b45ae35c23afc30 (git)
unaffected

Credits

Katriel Moses finder

References

github.com/jarrodwatts/claude-hud/issues/485 technical-description

github.com/jarrodwatts/claude-hud/pull/487 issue-tracking

github.com/...ommit/234d9aad919b51326a43bcf90b45ae35c23afc30 patch

www.vulncheck.com/...-hud-path-traversal-via-transcript-path third-party-advisory

cve.org (CVE-2026-47091)

nvd.nist.gov (CVE-2026-47091)

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