HOMEVULNERABILITIESCVE-2026-35623
MEDIUMPOC

CVE-2026-35623

CWE-307Published: April 9, 2026· Updated: Apr 16, 2026

6.5
CVSS v3.1
EPSS:0.05%probability of exploitation in 30 daysPercentile:14.7th

Official Description

OpenClaw before 2026.3.25 contains a missing rate limiting vulnerability in webhook authentication that allows attackers to brute-force weak webhook passwords without throttling. Remote attackers can repeatedly submit incorrect password guesses to the webhook endpoint to compromise authentication and gain unauthorized access.

NVD Source

Technical Analysis

CVE-2026-35623 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-2026-35623. 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/5e08ce36d522a1c96df2bfe88e39303ae2643d92
ADVISORYhttps://github.com/openclaw/openclaw/security/advisories/GHSA-xq8g-hgh6-87hv
ADVISORYhttps://www.vulncheck.com/advisories/openclaw-brute-force-attack-via-missing-webhook-password-rate-limiting

All References (3)

→
https://github.com/openclaw/openclaw/commit/5e08ce36d522a1c96df2bfe88e39303ae2643d92Patch
→
https://github.com/openclaw/openclaw/security/advisories/GHSA-xq8g-hgh6-87hvVendor Advisory
→
https://www.vulncheck.com/advisories/openclaw-brute-force-attack-via-missing-webhook-password-rate-limitingThird Party Advisory

Quick Facts

CVE IDCVE-2026-35623
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessCWE-307
CISA KEVNo
ExploitPOC
EPSS (30d)0.05%
Affected1 vendor
PublishedApr 9, 2026

Related CVEs (CWE-307)

CVE-2026-25114
9.8
CVE-2026-25113
9.8
CVE-2026-33640
9.8
CVE-2026-6853
9.8
CVE-2020-37228
9.8
CVE-2026-20792
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-35623 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.
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