Improper Certificate Validation in undici - CVE-2026-9697
Published: June 17, 2026
Vulnerability identifier: #VU134754
CSH Severity: Medium
CVSS v4 BT: 6.9 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2026-9697
CWE-ID: CWE-295
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to intercept and modify HTTPS traffic.
The vulnerability exists due to improper certificate validation in ProxyAgent and Socks5ProxyAgent when establishing HTTPS connections through a SOCKS5 proxy. A remote attacker can present a certificate signed by a publicly trusted CA for the target hostname to intercept and modify HTTPS traffic.
Only applications that rely on requestTls settings for TLS scope restriction when using a SOCKS5 proxy are affected.
Affected software
undici
Red Hat OpenShift Container Platform
Red Hat OpenShift Container Platform
How to mitigate CVE-2026-9697
Install security update from vendor's website.
undici - addressed in versions 7.28.0, 8.5.0
Red Hat OpenShift Container Platform - update to 4.16.66
Red Hat OpenShift Container Platform - update to 4.16.66