How severe is CVE-2026-28461?

CVE-2026-28461 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-28461 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-28461?

CVE-2026-28461 affects Openclaw. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-28461?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-28461 have an EU (EUVD) identifier?

Yes. CVE-2026-28461 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-13014.

When was CVE-2026-28461 published?

CVE-2026-28461 was published on 2026-03-19 and last updated on 2026-06-17.

CVE-2026-28461

CVE-2026-28461 is a high-severity vulnerability in Openclaw with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-770.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 8.7
EPSS exploit prediction: 0% (27th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-13014
Weakness: CWE-770
Affected product: Openclaw
Published: 2026-03-19
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-28461?: CVE-2026-28461 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-28461 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-28461?: CVE-2026-28461 affects Openclaw. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-28461?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-28461 have an EU (EUVD) identifier?: Yes. CVE-2026-28461 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-13014.
When was CVE-2026-28461 published?: CVE-2026-28461 was published on 2026-03-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*

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