How severe is CVE-2026-28449?

CVE-2026-28449 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability low.

Is CVE-2026-28449 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-28449?

CVE-2026-28449 affects Openclaw. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-28449?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-28449 have an EU (EUVD) identifier?

Yes. CVE-2026-28449 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-13011.

When was CVE-2026-28449 published?

CVE-2026-28449 was published on 2026-03-19 and last updated on 2026-06-17.

CVE-2026-28449

CVE-2026-28449 is a medium-severity vulnerability in Openclaw with a CVSS 3.x base score of 6.5. 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-294.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v4: 6.3
EPSS exploit prediction: 0% (18th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-13011
Weakness: CWE-294
Affected product: Openclaw
Published: 2026-03-19
Last modified: 2026-06-17

Description

OpenClaw versions prior to 2026.2.25 lack durable replay state for Nextcloud Talk webhook events, allowing valid signed webhook requests to be replayed without suppression. Attackers can capture and replay previously valid signed webhook requests to trigger duplicate inbound message processing and cause integrity or availability issues.

Frequently asked questions

What is CVE-2026-28449?: OpenClaw versions prior to 2026.2.25 lack durable replay state for Nextcloud Talk webhook events, allowing valid signed webhook requests to be replayed without suppression. Attackers can capture and replay previously valid signed webhook requests to trigger duplicate inbound message processing and cause integrity or availability issues.
How severe is CVE-2026-28449?: CVE-2026-28449 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability low.
Is CVE-2026-28449 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-28449?: CVE-2026-28449 affects Openclaw. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-28449?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-28449 have an EU (EUVD) identifier?: Yes. CVE-2026-28449 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-13011.
When was CVE-2026-28449 published?: CVE-2026-28449 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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