How severe is CVE-2026-28459?

CVE-2026-28459 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability high.

Is CVE-2026-28459 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-2026-28459?

CVE-2026-28459 affects Openclaw. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-28459?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-28459 have an EU (EUVD) identifier?

Yes. CVE-2026-28459 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9907.

When was CVE-2026-28459 published?

CVE-2026-28459 was published on 2026-03-05 and last updated on 2026-06-17.

CVE-2026-28459

CVE-2026-28459 is a high-severity vulnerability in Openclaw with a CVSS 3.x base score of 7.1. 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-73.

Key facts

Severity: High (CVSS 3.x base score 7.1)
CVSS v4: 7.1
EPSS exploit prediction: 0% (28th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-9907
Weakness: CWE-73
Affected product: Openclaw
Published: 2026-03-05
Last modified: 2026-06-17

Description

OpenClaw versions prior to 2026.2.12 fail to validate the sessionFile path parameter, allowing authenticated gateway clients to write transcript data to arbitrary locations on the host filesystem. Attackers can supply a sessionFile path outside the sessions directory to create files and append data repeatedly, potentially causing configuration corruption or denial of service.

Frequently asked questions

What is CVE-2026-28459?: OpenClaw versions prior to 2026.2.12 fail to validate the sessionFile path parameter, allowing authenticated gateway clients to write transcript data to arbitrary locations on the host filesystem. Attackers can supply a sessionFile path outside the sessions directory to create files and append data repeatedly, potentially causing configuration corruption or denial of service.
How severe is CVE-2026-28459?: CVE-2026-28459 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability high.
Is CVE-2026-28459 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-2026-28459?: CVE-2026-28459 affects Openclaw. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-28459?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-28459 have an EU (EUVD) identifier?: Yes. CVE-2026-28459 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9907.
When was CVE-2026-28459 published?: CVE-2026-28459 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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