CVE-2026-28478
OpenClaw < 2026.2.13 - Denial of Service via Unbounded Webhook Request Body Buffering
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-770 |
| Vendor | openclaw |
| Product | openclaw |
| Published | Mar 5, 2026 |
| Last Updated | Mar 9, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
OpenClaw / OpenClaw
0 < 2026.2.13
References
github.com: https://github.com/openclaw/openclaw/security/advisories/GHSA-q447-rj3r-2cgh github.com: https://github.com/openclaw/openclaw/commit/3cbcba10cf30c2ffb898f0d8c7dfb929f15f8930 vulncheck.com: https://www.vulncheck.com/advisories/openclaw-denial-of-service-via-unbounded-webhook-request-body-buffering
Credits
🔍 Vincent Koc (@vincentkoc)