HOMEVULNERABILITIESCVE-2026-35656
MEDIUMPOC

CVE-2026-35656

CWE-290Published: April 10, 2026· Updated: Apr 13, 2026

6.5
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2026-35656 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A proof-of-concept (PoC) exploit exists for CVE-2026-35656. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Affected Vendors & Products

openclaw1 product
openclaw
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

POC AVAILABLEProof-of-concept code exists
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/openclaw/openclaw/commit/630f1479c44f78484dfa21bb407cbe6f171dac87
PATCHhttps://github.com/openclaw/openclaw/commit/fc2d29ea926f47c428c556e92ec981441228d2a4
ADVISORYhttps://github.com/openclaw/openclaw/security/advisories/GHSA-844j-xrrq-wgh4
ADVISORYhttps://www.vulncheck.com/advisories/openclaw-xff-loopback-spoofing-bypass-in-canvas-authentication-and-rate-limiter

All References (4)

→
https://github.com/openclaw/openclaw/commit/630f1479c44f78484dfa21bb407cbe6f171dac87Patch
→
https://github.com/openclaw/openclaw/commit/fc2d29ea926f47c428c556e92ec981441228d2a4Patch
→
https://github.com/openclaw/openclaw/security/advisories/GHSA-844j-xrrq-wgh4Vendor Advisory
→
https://www.vulncheck.com/advisories/openclaw-xff-loopback-spoofing-bypass-in-canvas-authentication-and-rate-limiterThird Party Advisory

Quick Facts

CVE IDCVE-2026-35656
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessCWE-290
CISA KEVNo
ExploitPOC
Affected1 vendor
PublishedApr 10, 2026

Related CVEs (CWE-290)

CVE-2026-6213
10.0
CVE-2026-39858
10.0
CVE-2018-25316
9.8
CVE-2018-25317
9.8
CVE-2026-49468
9.8
CVE-2026-25660
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-35656 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
← All Vulnerabilities·Search for CVE-2026-35656·NVD