How severe is CVE-2026-41351?

CVE-2026-41351 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-41351 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-41351?

CVE-2026-41351 affects Openclaw. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-41351?

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

Does CVE-2026-41351 have an EU (EUVD) identifier?

Yes. CVE-2026-41351 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25335.

When was CVE-2026-41351 published?

CVE-2026-41351 was published on 2026-04-23 and last updated on 2026-06-17.

CVE-2026-41351

CVE-2026-41351 is a medium-severity vulnerability in Openclaw with a CVSS 3.x base score of 5.3. 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 5.3)
CVSS v4: 6.3
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-25335
Weakness: CWE-294
Affected product: Openclaw
Published: 2026-04-23
Last modified: 2026-06-17

Description

OpenClaw before 2026.3.31 contains a replay detection bypass vulnerability in webhook signature handling that treats Base64 and Base64URL encoded signatures as distinct requests. Attackers can re-encode Telnyx webhook signatures to bypass replay detection while maintaining valid signature verification.

Frequently asked questions

What is CVE-2026-41351?: OpenClaw before 2026.3.31 contains a replay detection bypass vulnerability in webhook signature handling that treats Base64 and Base64URL encoded signatures as distinct requests. Attackers can re-encode Telnyx webhook signatures to bypass replay detection while maintaining valid signature verification.
How severe is CVE-2026-41351?: CVE-2026-41351 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-41351 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-41351?: CVE-2026-41351 affects Openclaw. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-41351?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-41351 have an EU (EUVD) identifier?: Yes. CVE-2026-41351 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25335.
When was CVE-2026-41351 published?: CVE-2026-41351 was published on 2026-04-23 and last updated on 2026-06-17.

References

Affected products (1)

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

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