What is CVE-2026-28461?

CVE-2026-28461 is a high-severity vulnerability in Openclaw, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-03-19.

How severe is CVE-2026-28461?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Openclaw

CVE-2026-28461

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.

EPSS: 0.004 (28.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Openclaw — versions 0

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

disclosure@vulncheck.com (vendor-advisory, Mitigation, Vendor Advisory, third-party-advisory)
disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2026-28461?: CVE-2026-28461 is a high-severity vulnerability in Openclaw, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-03-19.
How severe is CVE-2026-28461?: High severity. CVSS v3 base score is 7.5 out of 10.