Medium severity · published Sep 26, 2026
CVE-2026-100554
OpenClaw before 2026.8.1 Canvas Capability Revocation Bypass
4.2
CVSS
0.2%
EPSS
No
On KEV
Description
OpenClaw (npm package 'openclaw') versions >= 2026.5.12 and < 2026.8.1 do not immediately invalidate Canvas HTTP authorization when a paired node is revoked. Node revocation invalidates the WebSocket client, but Canvas HTTP authorization continues to accept and renew the previously granted capability until WebSocket close cleanup completes. As a result, a revoked paired node can continue exercising its Canvas capability against the capability's configured routes during the close grace period. The issue is fixed in 2026.8.1; as a workaround, restart the Gateway after revoking a node that has Canvas access.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 12% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
OpenClaw · OpenClaw
2026.5.12 before 2026.8.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-100554
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-100554
vendor-advisory
https://github.com/openclaw/openclaw/security/advisories/GHSA-g697-vv6h-r8hv
third-party-advisory
https://www.vulncheck.com/advisories/openclaw-before-2026.8.1-canvas-capability-revocation-bypass
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