Is CVE-2026-32934 actively exploited?

No active exploitation of CVE-2026-32934 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-32934 be exploited remotely?

Yes. CVE-2026-32934 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-32934?

CVE-2026-32934 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2026-32934

HIGH

CVE-2026-32934

CWE-770Published: May 5, 2026· Updated: May 8, 2026

7.5

CVSS v3.1

EPSS:0.14%probability of exploitation in 30 daysPercentile:33.8th

Official Description

CoreDNS is a DNS server that chains plugins. In versions prior to 1.14.3, the DNS-over-QUIC (DoQ) server can be driven into unbounded goroutine and memory growth by a remote client that opens many QUIC streams and sends only 1 byte per stream. When the worker pool is full, CoreDNS still spawns a goroutine per accepted stream to wait for a worker token. Additionally, active workers block indefinitely in io.ReadFull() with no per-stream read deadline, allowing an attacker to pin all workers by sending a single byte so the read blocks waiting for the second byte of the DoQ length prefix. This enables an unauthenticated remote attacker to cause memory exhaustion and OOM-kill. This issue has been fixed in version 1.14.3. No known workarounds exist.

NVD Source

Technical Analysis

CVE-2026-32934 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.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.