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Description

Claude HUD through 0.0.12, patched in commit 234d9aa, constructs OSC 8 terminal hyperlink escape sequences using raw cwd and branchUrl values without stripping control characters or encoding embedded values, allowing attackers to inject arbitrary ANSI codes into terminal sessions. Attackers can embed ESC+backslash sequences in the current working directory or branch URL to execute malicious ANSI codes including text color changes, forged prompts, and OSC 52 clipboard writes, or trigger outbound HTTP requests to attacker-controlled remotes when hyperlinks are clicked.

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




LOW: 2.4CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

MEDIUM: 4.6CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Problem types

Improper Neutralization of Escape, Meta, or Control Sequences

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/...terminal-injection-via-osc-8-hyperlinks third-party-advisory

cve.org (CVE-2026-47090)

nvd.nist.gov (CVE-2026-47090)

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