Vulnerability-Lookup

FKIE_CVE-2026-35656

Vulnerability from fkie_nvd - Published: 2026-04-10 17:17 - Updated: 2026-06-17 10:40

Severity

6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Summary

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.

References

URL	Tags
disclosure@vulncheck.com	https://github.com/openclaw/openclaw/commit/630f1479c44f78484dfa21bb407cbe6f171dac87	Patch
disclosure@vulncheck.com	https://github.com/openclaw/openclaw/commit/fc2d29ea926f47c428c556e92ec981441228d2a4	Patch
disclosure@vulncheck.com	https://github.com/openclaw/openclaw/security/advisories/GHSA-844j-xrrq-wgh4	Vendor Advisory
disclosure@vulncheck.com	https://www.vulncheck.com/advisories/openclaw-xff-loopback-spoofing-bypass-in-canvas-authentication-and-rate-limiter	Third Party Advisory

Impacted products

	Vendor	Product	Version
	openclaw	openclaw	*

JSON

To clipboard

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          "packageURL": "pkg:npm/openclaw",
          "product": "OpenClaw",
          "vendor": "OpenClaw",
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    }
  ],
  "id": "CVE-2026-35656",
  "lastModified": "2026-06-17T10:40:58.533",
  "metrics": {
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          "attackComplexity": "LOW",
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          "modifiedAttackRequirements": "NOT_DEFINED",
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          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
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  "vulnStatus": "Analyzed",
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          "lang": "en",
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  ]
}

CVE-2026-35656 (GCVE-0-2026-35656)

Vulnerability from cvelistv5 – Published: 2026-04-10 16:03 – Updated: 2026-06-23 16:16 X_Open Source

Title

OpenClaw < 2026.3.22 - XFF Loopback Spoofing Bypass in Canvas Authentication and Rate Limiter

Summary

Severity

6.3 (Medium)


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

6.5 (Medium)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-04-10 18:23 UTC

CWE

CWE-290 - Authentication Bypass by Spoofing

Assigner

VulnCheck mitre root

References

4 references

URL	Tags
https://github.com/openclaw/openclaw/security/adv…	vendor-advisory
https://github.com/openclaw/openclaw/commit/630f1…	patch
https://github.com/openclaw/openclaw/commit/fc2d2…	patch
https://www.vulncheck.com/advisories/openclaw-xff…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
OpenClaw	OpenClaw	Affected: 0 , < 2026.3.22 (semver) Unaffected: 2026.3.22 (semver) cpe:2.3:a:openclaw:openclaw::::::node.js::*

Date Public

2026-03-24 00:00

Credits

lintsinghua

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.