Medium severity · published Sep 26, 2026
CVE-2026-100547
OpenClaw before 2026.8.1 Authentication Bypass via File URL
5.5
CVSS
0.1%
EPSS
No
On KEV
Description
OpenClaw is a coding agent distributed as the npm package `openclaw`. In affected versions (2026.7.1 through 2026.7.2), alternate but valid `file:` URL spellings supplied over the Agent Client Protocol (ACP) were treated as relative paths and were incorrectly classified as reads scoped to the session working directory. When an operator connected `openclaw acp client` to an untrusted or compromised ACP peer, that peer could request a read of a file outside the session working directory without the approval prompt normally required for that path, resulting in disclosure of local file contents. The demonstrated impact is limited to file confidentiality; mutating and command-capable tool classes are not affected. This issue is fixed in OpenClaw 2026.8.1.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 2% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
OpenClaw · OpenClaw
2026.7.1-2 before 2026.8.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-100547
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-100547
vendor-advisory
https://github.com/openclaw/openclaw/security/advisories/GHSA-356g-m7rx-7pm3
third-party-advisory
https://www.vulncheck.com/advisories/openclaw-before-2026.8.1-authentication-bypass-via-file-url
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