Home

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.

PUBLISHED Reserved 2026-02-27 | Published 2026-03-19 | Updated 2026-03-19 | Assigner VulnCheck




HIGH: 8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

HIGH: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem types

CWE-770: Allocation of Resources Without Limits or Throttling

Product status

Default status
unaffected

Any version before 2026.3.1
affected

Credits

Somet2mes reporter

Migraine (@migraine-sudo) reporter

References

github.com/...enclaw/security/advisories/GHSA-wr6m-jg37-68xh (GitHub Security Advisory (GHSA-wr6m-jg37-68xh)) third-party-advisory

www.vulncheck.com/...zalo-webhook-via-query-string-key-churn (VulnCheck Advisory: OpenClaw < 2026.3.1 - Unbounded Memory Growth in Zalo Webhook via Query String Key Churn) third-party-advisory

cve.org (CVE-2026-28461)

nvd.nist.gov (CVE-2026-28461)

Download JSON