CVE-2026-35656 | THREATINT

Description

OpenClaw before 2026.3.22 contains an authentication bypass vulnerability in the X-Forwarded-For header processing when trustedProxies is configured, allowing attackers to spoof loopback hops. Remote attackers can inject forged forwarding headers to bypass canvas authentication and rate-limiting protections by masquerading as loopback clients.

PUBLISHED Reserved 2026-04-04 | Published 2026-04-10 | Updated 2026-04-10 | Assigner VulnCheck

MEDIUM: 6.3CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

MEDIUM: 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Problem types

CWE-290: Authentication Bypass by Spoofing

Product status

Default status

unaffected

Any version before 2026.3.22

affected

2026.3.22 (semver)

unaffected

Credits

lintsinghua reporter

References

github.com/...enclaw/security/advisories/GHSA-844j-xrrq-wgh4 (GitHub Security Advisory (GHSA-844j-xrrq-wgh4)) third-party-advisory

github.com/...ommit/630f1479c44f78484dfa21bb407cbe6f171dac87 (Patch Commit #1) patch

github.com/...ommit/fc2d29ea926f47c428c556e92ec981441228d2a4 (Patch Commit #2) patch

www.vulncheck.com/...-canvas-authentication-and-rate-limiter (VulnCheck Advisory: OpenClaw < 2026.3.22 - XFF Loopback Spoofing Bypass in Canvas Authentication and Rate Limiter) third-party-advisory

cve.org (CVE-2026-35656)

nvd.nist.gov (CVE-2026-35656)

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