CVE-2026-41372 | THREATINT

Description

OpenClaw before 2026.4.2 fails to normalize trailing-dot localhost hosts in remote CDP discovery responses, allowing bypass of loopback protections. Attackers can craft hostile discovery responses returning localhost. to retarget authenticated browser control toward localhost endpoints and expose browser state.

PUBLISHED Reserved 2026-04-20 | Published 2026-04-27 | Updated 2026-04-28 | Assigner VulnCheck

MEDIUM: 6.9CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N

MEDIUM: 5.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

Problem types

CWE-639 Authorization Bypass Through User-Controlled Key

Product status

Default status

unaffected

Any version before 2026.4.2

affected

2026.4.2 (semver)

unaffected

Credits

smaeljaish771 reporter

KeenSecurityLab finder

References

github.com/...enclaw/security/advisories/GHSA-fh32-73r9-rgh5 (GitHub Security Advisory (GHSA-fh32-73r9-rgh5)) vendor-advisory

github.com/...ommit/9c22d636697336a6b22b0ae24798d8b8325d7828 (Patch Commit) patch

www.vulncheck.com/...trailing-dot-localhost-in-cdp-discovery (VulnCheck Advisory: OpenClaw < 2026.4.2 - Loopback Protection Bypass via Trailing-Dot Localhost in CDP Discovery) third-party-advisory

cve.org (CVE-2026-41372)

nvd.nist.gov (CVE-2026-41372)

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