Is CVE-2026-40943 actively exploited?

No active exploitation of CVE-2026-40943 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-40943 be exploited remotely?

Yes. CVE-2026-40943 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-40943?

CVE-2026-40943 has a CVSS score of 8.7 (HIGH).

HOME VULNERABILITIESCVE-2026-40943

HIGH

CVE-2026-40943

CWE-362Published: April 21, 2026· Updated: Apr 22, 2026

8.7

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:11.5th

Official Description

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.

NVD Source

Technical Analysis

CVE-2026-40943 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeX

Impact

Confidentiality

Integrity

Availability

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X