Is CVE-2026-6733 actively exploited?

No active exploitation of CVE-2026-6733 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-6733 be exploited remotely?

Yes. CVE-2026-6733 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-6733?

CVE-2026-6733 has a CVSS score of 3.7 (LOW).

HOME VULNERABILITIESCVE-2026-6733

LOW

CVE-2026-6733

CWE-367Published: June 17, 2026· Updated: Jun 17, 2026

3.7

CVSS v3.1

Official Description

Impact:

Undici's HTTP/1.1 client is vulnerable to response queue poisoning on reused keep-alive sockets. An attacker-controlled upstream server can inject an unsolicited HTTP/1.1 response onto an idle socket after a request completes. When the client dispatches the next request on that socket, it associates the injected response with the new request, causing responses to be delivered to the wrong requests.

This requires an attacker-controlled or compromised upstream HTTP/1.1 server and keep-alive connection reuse.

Patches:

Upgrade to undici v6.26.0, v7.28.0 or v8.5.0.

Workarounds:

Disable keep-alive connection reuse by setting keepAliveTimeout: 0 on the Client or Pool.

NVD Source

Technical Analysis

CVE-2026-6733 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.