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CVE-2026-28461

7.5 · HIGH

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 vary…

Published Mar 19, 2026openclawCWE-770EPSS 0.36%

Overview

CVE-2026-28461 is a high-severity vulnerability affecting openclaw openclaw. It was published on March 19, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories and patches from openclaw. Update openclaw to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
openclawopenclaw>= 0, < 2026.3.1Affected

References

GitHubgithub.com/openclaw/openclaw/security/advisories/GHSA-wr6m-jg37-68xhRefwww.vulncheck.com/advisories/openclaw-unbounded-memory-growth-in-zalo-webhook-via-query-string-key-churn

How CyberStrike helps

Frequently asked questions

What is CVE-2026-28461?

CVE-2026-28461 is a high-severity vulnerability affecting openclaw openclaw. It was published on March 19, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-28461?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-28461?

Check the references section for vendor advisories and patches from openclaw. Update openclaw to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-28461?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-28461 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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