How severe is CVE-2026-35623?

CVE-2026-35623 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-35623 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-35623?

CVE-2026-35623 affects Openclaw. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-35623?

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

Does CVE-2026-35623 have an EU (EUVD) identifier?

Yes. CVE-2026-35623 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21105.

When was CVE-2026-35623 published?

CVE-2026-35623 was published on 2026-04-09 and last updated on 2026-06-17.

CVE-2026-35623

CVE-2026-35623 is a medium-severity vulnerability in Openclaw with a CVSS 3.x base score of 4.8. 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-307.

Key facts

Severity: Medium (CVSS 3.x base score 4.8)
CVSS v4: 6.3
EPSS exploit prediction: 0% (28th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-21105
Weakness: CWE-307
Affected product: Openclaw
Published: 2026-04-09
Last modified: 2026-06-17

Description

OpenClaw before 2026.3.25 contains a missing rate limiting vulnerability in webhook authentication that allows attackers to brute-force weak webhook passwords without throttling. Remote attackers can repeatedly submit incorrect password guesses to the webhook endpoint to compromise authentication and gain unauthorized access.

Frequently asked questions

What is CVE-2026-35623?: OpenClaw before 2026.3.25 contains a missing rate limiting vulnerability in webhook authentication that allows attackers to brute-force weak webhook passwords without throttling. Remote attackers can repeatedly submit incorrect password guesses to the webhook endpoint to compromise authentication and gain unauthorized access.
How severe is CVE-2026-35623?: CVE-2026-35623 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-35623 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-35623?: CVE-2026-35623 affects Openclaw. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-35623?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-35623 have an EU (EUVD) identifier?: Yes. CVE-2026-35623 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21105.
When was CVE-2026-35623 published?: CVE-2026-35623 was published on 2026-04-09 and last updated on 2026-06-17.

References

Affected products (1)

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

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