CVE-2026-41296
OpenClaw < 2026.3.31 - Sandbox Escape via TOCTOU Race in Remote FS Bridge readFile
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
OpenClaw < 2026.3.31 - Sandbox Escape via TOCTOU Race in Remote FS Bridge readFile
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.
- Record
CVE-2026-41296- CVSS 4.0
- 8.8 High
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N - CVSS 3.1
- 8.2 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N - Weakness
- CWE-367
- Updated
- 2026-11-02
EUVDEUVD-2026-24000
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.
- Record
EUVD-2026-24000- CVSS 4.0
- 8.8 High
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-9p3r-hh9g-5cmg
OpenClaw: Sandbox escape via TOCTOU race in remote FS bridge readFile
Summary
Sandbox escape via TOCTOU race in remote FS bridge readFile
Current Maintainer Triage
- Normalized severity: critical
- Assessment: v2026.3.28 remote sandbox reads still do path-check then separate file read, so the TOCTOU sandbox escape remains present in the latest shipped tag.
Affected Packages / Versions
- Package:
openclaw(npm) - Latest published npm version:
2026.3.31 - Vulnerable version range:
<=2026.3.28 - Patched versions:
>= 2026.3.31 - First stable tag containing the fix:
v2026.3.31
Fix Commit(s)
121870a08583033ed6a0ed73d9ffea32991252bb— 2026-03-31T09:55:51+09:00
OpenClaw thanks @AntAISecurityLab for reporting.
- Record
GHSA-9p3r-hh9g-5cmg- CVSS 4.0
- 9.4 Critical
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:H - CVSS 3.1
- 8.2 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N - Weakness
- CWE-367
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-41296- CVSS 4.0
- 8.8 High
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 8.2 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N - Weakness
- CWE-367
- Updated
- 2026-11-02
OSV
OpenClaw < 2026.3.31 - Sandbox Escape via TOCTOU Race in Remote FS Bridge readFile
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.
- Record
CVE-2026-41296- CVSS 4.0
- 8.8 High
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N - Weakness
- CWE-367
- Updated
- 2026-11-02
OSVGHSA-9p3r-hh9g-5cmg
OpenClaw: Sandbox escape via TOCTOU race in remote FS bridge readFile
Summary
Sandbox escape via TOCTOU race in remote FS bridge readFile
Current Maintainer Triage
- Normalized severity: critical
- Assessment: v2026.3.28 remote sandbox reads still do path-check then separate file read, so the TOCTOU sandbox escape remains present in the latest shipped tag.
Affected Packages / Versions
- Package:
openclaw(npm) - Latest published npm version:
2026.3.31 - Vulnerable version range:
<=2026.3.28 - Patched versions:
>= 2026.3.31 - First stable tag containing the fix:
v2026.3.31
Fix Commit(s)
121870a08583033ed6a0ed73d9ffea32991252bb— 2026-03-31T09:55:51+09:00
OpenClaw thanks @AntAISecurityLab for reporting.
- Record
GHSA-9p3r-hh9g-5cmg- CVSS 4.0
- 9.4 Critical
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:H - CVSS 3.1
- 8.2 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N - Weakness
- CWE-367
- Updated
- 2026-11-02
Affected products
Affected packages
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-41296 is a high vulnerability (CVSS 8.8) in Openclaw, published April 3, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.20%, the 10th percentile. Fixed in openclaw 2026.3.31.
References
github.com/openclaw/openclaw/security/advisories/GHSA-9p3r-hh9g-5cmg
vulncheck.com/advisories/openclaw-sandbox-escape-via-toctou-race-in-remote-fs-bridge-readfile
nvd.nist.gov/vuln/detail/CVE-2026-41296