How severe is CVE-2026-28475?

CVE-2026-28475 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-2026-28475 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-28475?

CVE-2026-28475 affects Openclaw. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-28475?

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

Does CVE-2026-28475 have an EU (EUVD) identifier?

Yes. CVE-2026-28475 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9921.

When was CVE-2026-28475 published?

CVE-2026-28475 was published on 2026-03-05 and last updated on 2026-06-17.

CVE-2026-28475

CVE-2026-28475 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-208.

Key facts

Severity: Medium (CVSS 3.x base score 4.8)
CVSS v4: 6.3
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-9921
Weakness: CWE-208
Affected product: Openclaw
Published: 2026-03-05
Last modified: 2026-06-17

Description

OpenClaw versions prior to 2026.2.13 use non-constant-time string comparison for hook token validation, allowing attackers to infer tokens through timing measurements. Remote attackers with network access to the hooks endpoint can exploit timing side-channels across multiple requests to gradually recover the authentication token.

Frequently asked questions

What is CVE-2026-28475?: OpenClaw versions prior to 2026.2.13 use non-constant-time string comparison for hook token validation, allowing attackers to infer tokens through timing measurements. Remote attackers with network access to the hooks endpoint can exploit timing side-channels across multiple requests to gradually recover the authentication token.
How severe is CVE-2026-28475?: CVE-2026-28475 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-2026-28475 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-28475?: CVE-2026-28475 affects Openclaw. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-28475?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-28475 have an EU (EUVD) identifier?: Yes. CVE-2026-28475 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9921.
When was CVE-2026-28475 published?: CVE-2026-28475 was published on 2026-03-05 and last updated on 2026-06-17.

References

Affected products (1)

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

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