How severe is CVE-2026-35670?

CVE-2026-35670 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.

Is CVE-2026-35670 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-35670?

CVE-2026-35670 affects Openclaw. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-35670?

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

Does CVE-2026-35670 have an EU (EUVD) identifier?

Yes. CVE-2026-35670 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21486.

When was CVE-2026-35670 published?

CVE-2026-35670 was published on 2026-04-10 and last updated on 2026-06-17.

CVE-2026-35670

CVE-2026-35670 is a medium-severity vulnerability in Openclaw with a CVSS 3.x base score of 5.9. 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-807.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
CVSS v4: 6.0
EPSS exploit prediction: 0% (14th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-21486
Weakness: CWE-807
Affected product: Openclaw
Published: 2026-04-10
Last modified: 2026-06-17

Description

OpenClaw before 2026.3.22 contains a webhook reply delivery vulnerability that allows attackers to rebind chat replies to unintended users by exploiting mutable username matching instead of stable numeric user identifiers. Attackers can manipulate username changes to redirect webhook-triggered replies to different users, bypassing the intended recipient binding recorded in webhook events.

Frequently asked questions

What is CVE-2026-35670?: OpenClaw before 2026.3.22 contains a webhook reply delivery vulnerability that allows attackers to rebind chat replies to unintended users by exploiting mutable username matching instead of stable numeric user identifiers. Attackers can manipulate username changes to redirect webhook-triggered replies to different users, bypassing the intended recipient binding recorded in webhook events.
How severe is CVE-2026-35670?: CVE-2026-35670 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.
Is CVE-2026-35670 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-35670?: CVE-2026-35670 affects Openclaw. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-35670?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-35670 have an EU (EUVD) identifier?: Yes. CVE-2026-35670 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21486.
When was CVE-2026-35670 published?: CVE-2026-35670 was published on 2026-04-10 and last updated on 2026-06-17.

References

Affected products (1)

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

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