undici ProxyAgent TLS drop (SOCKS5, v7.23.08.4.x)
CVE-2026-9697 Published on June 17, 2026

undici vulnerable to TLS certificate validation bypass via dropped requestTls in SOCKS5 ProxyAgent
Impact: undici's ProxyAgent silently drops the requestTls option when configured with a SOCKS5 proxy URI (socks5:// or socks://). The target HTTPS connection through the SOCKS5 tunnel falls back to Node's default trust store, ignoring user-configured ca, cert, key, rejectUnauthorized, and servername settings. Applications that pin to an internal or corporate CA via requestTls.ca will, when their proxy URI is SOCKS5, get the default Mozilla CA bundle as the trust anchor instead. Any cert signed by any publicly-trusted CA for the target hostname is accepted, breaking the intended pin and enabling MITM read and tamper of the HTTPS exchange. Affected applications are those that use undici's ProxyAgent (or Socks5ProxyAgent directly) with SOCKS5 AND rely on requestTls for TLS scope restriction. The bug was introduced in undici 7.23.0 when SOCKS5 support was added. Patches: Upgrade to undici v7.28.0 or v8.5.0. Workarounds: No workaround is available within the SOCKS5 path. If a SOCKS5 proxy with TLS scope restriction is required and an upgrade is not yet possible, route the traffic through an HTTP-proxy ProxyAgent instead, where requestTls is honored correctly.

NVD

Vulnerability Analysis

CVE-2026-9697 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality and integrity, and no impact on availability.

Attack Vector:

NETWORK

Attack Complexity:

HIGH

Privileges Required:

NONE

User Interaction:

NONE

Scope:

UNCHANGED

Confidentiality Impact:

HIGH

Integrity Impact:

HIGH

Availability Impact:

NONE

Weakness Type

Improper Certificate Validation

The software does not validate, or incorrectly validates, a certificate. When a certificate is invalid or malicious, it might allow an attacker to spoof a trusted entity by interfering in the communication path between the host and client. The software might connect to a malicious host while believing it is a trusted host, or the software might be deceived into accepting spoofed data that appears to originate from a trusted host.

Products Associated with CVE-2026-9697

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Red Hat Hummingbird

Red Hat Cryostat

Red Hat Openshift Pipelines

Red Hat Podman Desktop

Red Hat Rhdh

Red Hat Enterprise Linux (RHEL)

Red Hat Openshift Ai

Red Hat Openshift

Red Hat Openshift Data Foundation

Red Hat Openshift Devspaces

Red Hat Ansible Portal

Red Hat Amq Broker

Red Hat Cluster Observability Operator

Affected Versions

undici:

Version 7.23.0 and below 7.28.0 is affected.
Version 7.28.0 is unaffected.
Version 8.0.0 and below 8.5.0 is affected.
Version 8.5.0 is unaffected.

Red Hat Cryostat 4 on RHEL 9:

Version 4.2.0-13 and below * is unaffected.

Red Hat Enterprise Linux 10:

Version 1:24.18.0-1.el10_2 and below * is unaffected.

Red Hat Enterprise Linux 8:

Version 8100020260630152626.6d880403 and below * is unaffected.

Red Hat Enterprise Linux 9:

Version 9080020260626074955.rhel9 and below * is unaffected.

Red Hat Cluster Observability Operator 1.5.0:

Version 1782840519 and below * is unaffected.

Red Hat Cluster Observability Operator 1.5.0:

Version 1782839981 and below * is unaffected.

Red Hat Cluster Observability Operator 1.5.0:

Version 1782839193 and below * is unaffected.

Red Hat Cluster Observability Operator 1.5.0:

Version 1782838753 and below * is unaffected.

Red Hat Cluster Observability Operator 1.5.0:

Version 1782841925 and below * is unaffected.

Red Hat Cluster Observability Operator 1.5.0:

Version 1782844225 and below * is unaffected.

Red Hat Cluster Observability Operator 1.5.0:

Version 1782839658 and below * is unaffected.

Red Hat Cluster Observability Operator 1.5.0:

Version 1782838476 and below * is unaffected.

Red Hat Cluster Observability Operator 1.5.0:

Version 1782839494 and below * is unaffected.

Red Hat Developer Hub 1.10:

Version 1783448184 and below * is unaffected.

Red Hat Developer Hub 1.9:

Version 1784210921 and below * is unaffected.

Red Hat Hardened Images:

Version 26.3.0-1.2.hum1 and below * is unaffected.

Red Hat Hardened Images:

Version 1.96.0-1.hum1 and below * is unaffected.

Red Hat Hardened Images:

Version 24.18.0-0.3.hum1 and below * is unaffected.

Red Hat Hardened Images:

Version 25.9.0-1.1.hum1 and below * is unaffected.

Red Hat OpenShift AI 3.4:

Version 1787121387 and below * is unaffected.

Red Hat OpenShift Container Platform 4.16:

Version 1783306396 and below * is unaffected.

Red Hat OpenShift Container Platform 4.17:

Version 1784744859 and below * is unaffected.

Red Hat Openshift Data Foundation 4.18:

Version 1786705347 and below * is unaffected.

Red Hat Openshift Data Foundation 4.18:

Version 1786706101 and below * is unaffected.

Red Hat Openshift Data Foundation 4.18:

Version 1786705558 and below * is unaffected.

Red Hat Openshift Data Foundation 4.18:

Version 1786705646 and below * is unaffected.

Red Hat Openshift Data Foundation 4.18:

Version 1786706138 and below * is unaffected.

Red Hat Openshift Data Foundation 4.18:

Version 1786705741 and below * is unaffected.

Red Hat Openshift Data Foundation 4.18:

Version 1786705777 and below * is unaffected.

Red Hat Openshift Data Foundation 4.18:

Version 1786705802 and below * is unaffected.

Red Hat Openshift Data Foundation 4.18:

Version 1786705938 and below * is unaffected.

Red Hat Openshift Data Foundation 4.18:

Version 1786706577 and below * is unaffected.

Red Hat Openshift Data Foundation 4.18:

Version 1786706125 and below * is unaffected.

Red Hat Openshift Data Foundation 4.18:

Version 1786706177 and below * is unaffected.

Red Hat Openshift Data Foundation 4.18:

Version 1786706188 and below * is unaffected.

Red Hat Openshift Data Foundation 4.18:

Version 1786706679 and below * is unaffected.

Red Hat Openshift Data Foundation 4.18:

Version 1786706357 and below * is unaffected.

Red Hat Openshift Data Foundation 4.18:

Version 1786706612 and below * is unaffected.

Red Hat Openshift Data Foundation 4.18:

Version 1786706644 and below * is unaffected.

Red Hat Openshift Data Foundation 4.18:

Version 1786706659 and below * is unaffected.

Red Hat Openshift Data Foundation 4.18:

Version 1786706880 and below * is unaffected.

Red Hat Openshift Data Foundation 4.19:

Version 1786701839 and below * is unaffected.

Red Hat Openshift Data Foundation 4.19:

Version 1786701555 and below * is unaffected.

Red Hat Openshift Data Foundation 4.19:

Version 1786702052 and below * is unaffected.

Red Hat Openshift Data Foundation 4.19:

Version 1786702559 and below * is unaffected.

Red Hat Openshift Data Foundation 4.19:

Version 1786702713 and below * is unaffected.

Red Hat Openshift Data Foundation 4.19:

Version 1786702264 and below * is unaffected.

Red Hat Openshift Data Foundation 4.19:

Version 1786702448 and below * is unaffected.

Red Hat Openshift Data Foundation 4.19:

Version 1786702276 and below * is unaffected.

Red Hat Openshift Data Foundation 4.19:

Version 1786702440 and below * is unaffected.

Red Hat Openshift Data Foundation 4.19:

Version 1786702315 and below * is unaffected.

Red Hat Openshift Data Foundation 4.19:

Version 1786703071 and below * is unaffected.

Red Hat Openshift Data Foundation 4.19:

Version 1786702563 and below * is unaffected.

Red Hat Openshift Data Foundation 4.19:

Version 1786702636 and below * is unaffected.

Red Hat Openshift Data Foundation 4.19:

Version 1786702623 and below * is unaffected.

Red Hat Openshift Data Foundation 4.19:

Version 1786703137 and below * is unaffected.

Red Hat Openshift Data Foundation 4.19:

Version 1786702716 and below * is unaffected.

Red Hat Openshift Data Foundation 4.19:

Version 1786702872 and below * is unaffected.

Red Hat Openshift Data Foundation 4.19:

Version 1786702949 and below * is unaffected.

Red Hat Openshift Data Foundation 4.19:

Version 1786702917 and below * is unaffected.

Red Hat Openshift Data Foundation 4.19:

Version 1786703143 and below * is unaffected.