How severe is CVE-2026-35636?

CVE-2026-35636 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-35636 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-35636?

CVE-2026-35636 affects Openclaw. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-35636?

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

Does CVE-2026-35636 have an EU (EUVD) identifier?

Yes. CVE-2026-35636 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21128.

When was CVE-2026-35636 published?

CVE-2026-35636 was published on 2026-04-09 and last updated on 2026-06-17.

CVE-2026-35636

CVE-2026-35636 is a medium-severity vulnerability in Openclaw with a CVSS 3.x base score of 6.5. 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-696.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v4: 7.1
EPSS exploit prediction: 0% (17th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-21128
Weakness: CWE-696
Affected product: Openclaw
Published: 2026-04-09
Last modified: 2026-06-17

Description

OpenClaw versions 2026.3.11 through 2026.3.24 contain a session isolation bypass vulnerability where session_status resolves sessionId to canonical session keys before enforcing visibility checks. Sandboxed child sessions can exploit this to access parent or sibling sessions that should be blocked by explicit sessionKey restrictions.

Frequently asked questions

What is CVE-2026-35636?: OpenClaw versions 2026.3.11 through 2026.3.24 contain a session isolation bypass vulnerability where session_status resolves sessionId to canonical session keys before enforcing visibility checks. Sandboxed child sessions can exploit this to access parent or sibling sessions that should be blocked by explicit sessionKey restrictions.
How severe is CVE-2026-35636?: CVE-2026-35636 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-35636 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-35636?: CVE-2026-35636 affects Openclaw. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-35636?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-35636 have an EU (EUVD) identifier?: Yes. CVE-2026-35636 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21128.
When was CVE-2026-35636 published?: CVE-2026-35636 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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