Vulnerability · Published Apr 21, 2026 · Assigned by GitHub_M

CVE-2026-40944Oxia: TLS CA certificate chain validation fails with multi-certificate PEM bundles

Medium 6.9

In plain English

A medium-severity improper certificate validation in oxia from oxia-db. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 5% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)6.9Medium

Exploit odds (30 days)0.2%top 94.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/oxia-db/oxia	0.16.2	GHSA-7jrq-q4pq-rhm6
Go	github.com/oxia-db/oxia	0.16.2	GO-2026-5226

Affected products (as reported)

Vendor	Product	Versions
oxia-db	oxia	< 0.16.2

Weakness: CWE-295 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

References

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