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Description

OpenClaw before 2026.3.31 contains a time-of-check-time-of-use race condition in the remote filesystem bridge readFile function that allows sandbox escape. Attackers can exploit the separate path validation and file read operations to bypass sandbox restrictions and read arbitrary files.

PUBLISHED Reserved 2026-04-20 | Published 2026-04-20 | Updated 2026-04-21 | Assigner VulnCheck




HIGH: 8.8CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N

HIGH: 8.2CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N

Problem types

CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition

Product status

Default status
unaffected

Any version before 2026.3.31
affected

2026.3.31 (semver)
unaffected

Credits

AntAISecurityLab reporter

References

github.com/...enclaw/security/advisories/GHSA-9p3r-hh9g-5cmg (GitHub Security Advisory (GHSA-9p3r-hh9g-5cmg)) vendor-advisory

github.com/...ommit/121870a08583033ed6a0ed73d9ffea32991252bb (Patch Commit) patch

www.vulncheck.com/...octou-race-in-remote-fs-bridge-readfile (VulnCheck Advisory: OpenClaw < 2026.3.31 - Sandbox Escape via TOCTOU Race in Remote FS Bridge readFile) third-party-advisory

cve.org (CVE-2026-41296)

nvd.nist.gov (CVE-2026-41296)

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