How severe is CVE-2026-41343?

CVE-2026-41343 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2026-41343 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-41343?

CVE-2026-41343 affects Openclaw. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-41343?

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

Does CVE-2026-41343 have an EU (EUVD) identifier?

Yes. CVE-2026-41343 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25327.

When was CVE-2026-41343 published?

CVE-2026-41343 was published on 2026-04-23 and last updated on 2026-06-17.

CVE-2026-41343

CVE-2026-41343 is a medium-severity vulnerability in Openclaw with a CVSS 3.x base score of 5.3. 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-799.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v4: 6.9
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-25327
Weakness: CWE-799
Affected product: Openclaw
Published: 2026-04-23
Last modified: 2026-06-17

Description

OpenClaw before 2026.3.31 lacks a shared pre-auth concurrency budget on the public LINE webhook path, allowing attackers to cause transient availability loss. Remote attackers can flood the webhook endpoint with concurrent requests before signature verification to exhaust resources and degrade service availability.

Frequently asked questions

What is CVE-2026-41343?: OpenClaw before 2026.3.31 lacks a shared pre-auth concurrency budget on the public LINE webhook path, allowing attackers to cause transient availability loss. Remote attackers can flood the webhook endpoint with concurrent requests before signature verification to exhaust resources and degrade service availability.
How severe is CVE-2026-41343?: CVE-2026-41343 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2026-41343 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-41343?: CVE-2026-41343 affects Openclaw. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-41343?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-41343 have an EU (EUVD) identifier?: Yes. CVE-2026-41343 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25327.
When was CVE-2026-41343 published?: CVE-2026-41343 was published on 2026-04-23 and last updated on 2026-06-17.

References

Affected products (1)

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

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