undici vulnerable to TLS certificate validation bypass via dropped requestTls in SOCKS5 ProxyAgent

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2026-9697
StatePUBLISHED
Assigneropenjs
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-17 18:18:06 UTC
Updated2026-07-13 13:16:48 UTC
DescriptionImpact: 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.

Risk And Classification

Primary CVSS: v3.1 7.4 HIGH from ADP

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS: 0.002770000 probability, percentile 0.194180000 (date 2026-06-26)

Problem Types: CWE-295 | CWE-295 CWE-295: Improper Certificate Validation | CWE-295 Improper Certificate Validation

VersionSourceTypeScoreSeverityVector
3.1ADPCVSS7.4HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
3.1ce714d77-add3-4f53-aff5-83d477b104bbSecondary7.4HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
3.10b0ca135-0b70-47e7-9f44-1890c2a1c46cSecondary7.4HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
3.1CNACVSS7.4HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Nodejs Undici All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Undici Undici affected 7.23.0 7.28.0 semver Not specified
CNA Undici Undici unaffected 7.28.0 semver Not specified
CNA Undici Undici affected 8.0.0 8.5.0 semver Not specified
CNA Undici Undici unaffected 8.5.0 semver Not specified
ADP Red Hat Red Hat Enterprise Linux AppStream V. 10 Not specified Not specified
ADP Red Hat Red Hat Enterprise Linux AppStream V. 9 Not specified Not specified
ADP Red Hat Cluster Observability Operator 1.5.0 Not specified Not specified
ADP Red Hat Red Hat Developer Hub 1.10 Not specified Not specified
ADP Red Hat Red Hat Hardened Images Not specified Not specified
ADP Red Hat Red Hat OpenShift Dev Spaces 3.29 Not specified Not specified
ADP Red Hat Cryostat 4 Not specified Not specified
ADP Red Hat OpenShift Pipelines Not specified Not specified
ADP Red Hat Red Hat Build Of Podman Desktop Not specified Not specified
ADP Red Hat Red Hat Enterprise Linux 8 Not specified Not specified
ADP Red Hat Red Hat OpenShift AI RHOAI Not specified Not specified
ADP Red Hat Red Hat OpenShift Container Platform 4 Not specified Not specified
ADP Red Hat Red Hat Openshift Data Foundation 4 Not specified Not specified
ADP Red Hat Red Hat OpenShift Dev Spaces Not specified Not specified
ADP Red Hat Self-service Automation Portal 2 Not specified Not specified
ADP Red Hat Red Hat AMQ Broker 7 Not specified Not specified
ADP Red Hat Red Hat Enterprise Linux 10 Not specified Not specified
ADP Red Hat Red Hat Enterprise Linux 9 Not specified Not specified

References

ReferenceSourceLinkTags
cna.openjsf.org/security-advisories.html ce714d77-add3-4f53-aff5-83d477b104bb cna.openjsf.org Vendor Advisory
access.redhat.com/errata/RHSA-2026:7378 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:22380 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:35891 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
bugzilla.redhat.com/show_bug.cgi 0b0ca135-0b70-47e7-9f44-1890c2a1c46c bugzilla.redhat.com
access.redhat.com/errata/RHSA-2026:34342 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:36754 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
github.com/nodejs/undici/security/advisories/GHSA-vmh5-mc38-953g ce714d77-add3-4f53-aff5-83d477b104bb github.com Mitigation, Vendor Advisory
access.redhat.com/errata/RHSA-2026:22934 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-9697.json 0b0ca135-0b70-47e7-9f44-1890c2a1c46c security.access.redhat.com
access.redhat.com/errata/RHSA-2026:35841 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/security/cve/CVE-2026-9697 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:38236 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:36820 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: tonghuaroot (en)

CNA: UlisesGascon (en)

Additional Advisory Data

SourceTimeEvent
ADP2026-06-17T19:03:30.813ZReported to Red Hat.
ADP2026-06-17T16:46:42.706ZMade public.

Solutions

ADP: RHSA-2026:35841: Red Hat Enterprise Linux AppStream (v. 10)

ADP: RHSA-2026:35891: Red Hat Enterprise Linux AppStream (v. 9)

ADP: RHSA-2026:34342: Cluster Observability Operator 1.5.0

ADP: RHSA-2026:36754: Red Hat Developer Hub 1.10

ADP: RHSA-2026:38236: Red Hat Hardened Images

ADP: RHSA-2026:7378: Red Hat Hardened Images

ADP: RHSA-2026:22380: Red Hat Hardened Images

ADP: RHSA-2026:22934: Red Hat Hardened Images

ADP: RHSA-2026:36820: Red Hat OpenShift Dev Spaces 3.29

Workarounds

ADP: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

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