High severity7.5NVD Advisory· Published Mar 19, 2026· Updated Jun 17, 2026
CVE-2026-28461
CVE-2026-28461
Description
OpenClaw versions prior to 2026.3.1 contain an unbounded memory growth vulnerability in the Zalo webhook endpoint that allows unauthenticated attackers to trigger in-memory key accumulation by varying query strings. Remote attackers can exploit this by sending repeated requests with different query parameters to cause memory pressure, process instability, or out-of-memory conditions that degrade service availability.
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Affected products
3Patches
Vulnerability mechanics
References
2- github.com/openclaw/openclaw/security/advisories/GHSA-wr6m-jg37-68xhnvdMitigationVendor Advisory
- www.vulncheck.com/advisories/openclaw-unbounded-memory-growth-in-zalo-webhook-via-query-string-key-churnnvdThird Party Advisory
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