CVE-2026-28478
HIGHOpenClaw < 2026.2.13 - Unauthenticated Denial of Service via Webhook Request Body Buffering
Title source: llmDescription
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.
References (3)
Core 3
Core References
Vendor Advisory vendor-advisory
https://github.com/openclaw/openclaw/security/advisories/GHSA-q447-rj3r-2cgh
Third Party Advisory third-party-advisory
https://www.vulncheck.com/advisories/openclaw-denial-of-service-via-unbounded-webhook-request-body-buffering
Scores
CVSS v3
7.5
EPSS
0.0044
EPSS Percentile
34.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-770
Status
published
Products (1)
openclaw/openclaw
< 2026.2.13
Published
Mar 05, 2026
Tracked Since
Mar 06, 2026