CVE-2026-28478

HIGH

7.5

Description

OpenClaw versions prior to 2026.2.13 contain a denial of service vulnerability in webhook handlers that buffer request bodies without strict byte or time limits. Remote unauthenticated attackers can send oversized JSON payloads or slow uploads to webhook endpoints causing memory pressure and availability degradation.

CVE Details

CVSS v3.1 Score7.5

SeverityHIGH

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published3/5/2026

Last Modified3/17/2026

Sourcenvd

Honeypot Sightings0

Affected Products

openclaw:openclaw

Weaknesses (CWE)

CWE-770

References

https://github.com/openclaw/openclaw/commit/3cbcba10cf30c2ffb898f0d8c7dfb929f15f8930(disclosure@vulncheck.com)

https://github.com/openclaw/openclaw/security/advisories/GHSA-q447-rj3r-2cgh(disclosure@vulncheck.com)

https://www.vulncheck.com/advisories/openclaw-denial-of-service-via-unbounded-webhook-request-body-buffering(disclosure@vulncheck.com)

IOC Correlations

No correlations recorded

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