TI-2026-29594 Aliases CVE-2026-40943 GHSA-5gqc-qhrj-9xw8

Oxia: Server crash via race condition in session heartbeat handling

LOW 37CWE-362Published 2026-04-21 · Updated 2026-04-22

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: —
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.

Summary

Oxia is a metadata store and coordination system. Prior to 0.16.2, a race condition between session heartbeat processing and session closure can cause the server to panic with send on closed channel. The heartbeat() method uses a blocking channel send while holding a mutex, and under specific timing with concurrent close() calls, this can lead to either a deadlock (channel buffer full) or a panic (send on closed channel after TOCTOU gap in KeepAlive). This vulnerability is fixed in 0.16.2.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00202 10th percentileScored 2026-11-07

Fix Fixed oxia (oxia-db): 0.16.2github.com/oxia-db/oxia (Go): 0.16.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
oxia-db	oxia	before 0.16.2	0.16.2	Patch available	CNA
—	github.com/oxia-db/oxia (Go)	before 0.16.2	0.16.2	Patch available	GHSA-5gqc-qhrj-9xw8

oxia Vendoroxia-db Affected before 0.16.2 Fixed in 0.16.2 Patch available CNA
github.com/oxia-db/oxia (Go) Vendor— Affected before 0.16.2 Fixed in 0.16.2 Patch available GHSA-5gqc-qhrj-9xw8

Remediation

Fix · CNA oxia (oxia-db) Fixed in 0.16.2
Fix · GHSA-5gqc-qhrj-9xw8 github.com/oxia-db/oxia (Go) Fixed in 0.16.2 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-40943
2026-10-03 Alias added: GHSA-5gqc-qhrj-9xw8

References

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-40943

Other 2

TI-2026-29597 Oxia: OIDC token audience validation bypass via SkipClientIDCheck CVSS 4.0CRITICAL 9.2
TI-2026-29596 Oxia: Bearer token exposed in debug log messages on authentication failure CVSS 4.0HIGH 8.7
TI-2026-29595 Oxia: TLS CA certificate chain validation fails with multi-certificate PEM bundles CVSS 4.0MEDIUM 6.9

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences