How severe is CVE-2026-40944?

CVE-2026-40944 has a CVSS 4.0 base score of 6.9, rated medium severity.

Is CVE-2026-40944 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-40944?

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

Does CVE-2026-40944 have an EU (EUVD) identifier?

Yes. CVE-2026-40944 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-24509.

When was CVE-2026-40944 published?

CVE-2026-40944 was published on 2026-04-21 and last updated on 2026-06-17.

CVE-2026-40944

CVE-2026-40944 is a medium-severity vulnerability with a CVSS 4.0 base score of 6.9. 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-295.

Key facts

Severity: Medium (CVSS 4.0 base score 6.9)
EPSS exploit prediction: 0% (6th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-24509
Weakness: CWE-295
Published: 2026-04-21
Last modified: 2026-06-17

Description

Oxia is a metadata store and coordination system. Prior to 0.16.2, the trustedCertPool() function in the TLS configuration only parses the first PEM block from CA certificate files. When a CA bundle contains multiple certificates (e.g., intermediate + root CA), only the first certificate is loaded. This silently breaks certificate chain validation for mTLS. This vulnerability is fixed in 0.16.2.

Frequently asked questions

What is CVE-2026-40944?: Oxia is a metadata store and coordination system. Prior to 0.16.2, the trustedCertPool() function in the TLS configuration only parses the first PEM block from CA certificate files. When a CA bundle contains multiple certificates (e.g., intermediate + root CA), only the first certificate is loaded. This silently breaks certificate chain validation for mTLS. This vulnerability is fixed in 0.16.2.
How severe is CVE-2026-40944?: CVE-2026-40944 has a CVSS 4.0 base score of 6.9, rated medium severity.
Is CVE-2026-40944 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-40944?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-40944 have an EU (EUVD) identifier?: Yes. CVE-2026-40944 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-24509.
When was CVE-2026-40944 published?: CVE-2026-40944 was published on 2026-04-21 and last updated on 2026-06-17.

References

https://github.com/oxia-db/oxia/security/advisories/GHSA-7jrq-q4pq-rhm6

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