CVE-2026-6733

LOW EPSS 13.5%
Published Jun 17, 20261w ago · Modified Jun 17, 20261w ago
3.7 CVSS 3.1
Low
Find Similar
Published Jun 17, 2026 1w ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
3.7
Exploitability
2.2
Impact
1.4
Vector string
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity Low
Availability None

Threat Intelligence

EPSS Exploit Probability
13.5% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-367

References 3

  • cna.openjsf.org https://cna.openjsf.org/security-advisories.html
  • github.com https://github.com/nodejs/undici/security/advisories/GHSA-35p6-xmwp-9g52
  • hackerone.com https://hackerone.com/reports/3582376

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.