--- id: CVE-2026-9697 title: >- undici: undici: Man-in-the-Middle attack via ignored TLS options with SOCKS5 proxy (CVE-2026-9697) summary: >- A flaw was found in undici. When undici's ProxyAgent is configured with a SOCKS5 proxy Uniform Resource Identifier (URI), it silently ignores Transport Layer Security (TLS) options, such as custom Certificate Authorities (CAs). This allows… severity: high cvss: 7.4 cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N' cvssSource: vendor cwe: CWE-295 vendor: Red Hat product: Red Hat Openshift Data Foundation 4.20 affected: - cryostat 4 - openshift_pipelines - build_of_podman_desktop - openshift_ai_rhoai - self_service_automation_portal 2 - cryostat_4_on_rhel 9 - enterprise_linux_appstream_v_10 - enterprise_linux_appstream_v_8 - enterprise_linux_appstream_v_9 - cluster_observability_operator 1.5.0 - developer_hub 1.10 - developer_hub 1.9 - hardened_images - openshift_ai 2.25 - openshift_ai 3.4 - openshift_container_platform 4.16 - openshift_container_platform 4.17 - openshift_dev_spaces 3.29 - openshift_data_foundation 4.18 - openshift_data_foundation 4.19 - openshift_data_foundation 4.20 patched: - cryostat_4_on_rhel 9 - enterprise_linux_appstream_v_10 - enterprise_linux_appstream_v_8 - enterprise_linux_appstream_v_9 - cluster_observability_operator 1.5.0 - developer_hub 1.10 - developer_hub 1.9 - hardened_images - openshift_ai 2.25 - openshift_ai 3.4 - openshift_container_platform 4.16 - openshift_container_platform 4.17 - openshift_dev_spaces 3.29 - openshift_data_foundation 4.18 - openshift_data_foundation 4.19 - openshift_data_foundation 4.20 published: '2026-06-17' updated: '2026-09-18' sourceUpdated: '2026-09-18T13:16:11+00:00' source: CSAF sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-9697.json' references: - url: >- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-9697.json - url: 'https://access.redhat.com/security/cve/CVE-2026-9697' - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2490018' - url: 'https://www.cve.org/CVERecord?id=CVE-2026-9697' - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-9697' - url: 'https://cna.openjsf.org/security-advisories.html' - url: 'https://github.com/nodejs/undici/security/advisories/GHSA-vmh5-mc38-953g' - url: 'https://access.redhat.com/errata/RHSA-2026:48151' - url: 'https://access.redhat.com/errata/RHSA-2026:35841' - url: 'https://access.redhat.com/errata/RHSA-2026:39868' - url: 'https://access.redhat.com/errata/RHSA-2026:35891' - url: 'https://access.redhat.com/errata/RHSA-2026:34342' - url: 'https://access.redhat.com/errata/RHSA-2026:36754' - url: 'https://access.redhat.com/errata/RHSA-2026:41929' - url: 'https://access.redhat.com/errata/RHSA-2026:38236' - url: 'https://access.redhat.com/errata/RHSA-2026:7378' - url: 'https://access.redhat.com/errata/RHSA-2026:22380' - url: 'https://access.redhat.com/errata/RHSA-2026:22934' - url: 'https://access.redhat.com/errata/RHSA-2026:65126' - url: 'https://access.redhat.com/errata/RHSA-2026:60520' - url: 'https://access.redhat.com/errata/RHSA-2026:36621' - url: 'https://access.redhat.com/errata/RHSA-2026:47728' - url: 'https://access.redhat.com/errata/RHSA-2026:48124' - url: 'https://access.redhat.com/errata/RHSA-2026:36820' - url: 'https://access.redhat.com/errata/RHSA-2026:56431' - url: 'https://access.redhat.com/errata/RHSA-2026:56366' - url: 'https://access.redhat.com/errata/RHSA-2026:57013' - url: 'https://github.com/advisories/GHSA-vmh5-mc38-953g' tags: - csaf - vex - red-hat - cve.org - nvd - ghsa - npm epss: 0.00554 epssPercentile: 0.43894 ecosystem: npm ssvc: exploitation: none automatable: 'no' technicalImpact: total timestamp: '2026-06-22T00:00:00+00:00' ingestedAt: '2026-06-19T03:39:00.822Z' --- ## Overview A flaw was found in undici. When undici's ProxyAgent is configured with a SOCKS5 proxy Uniform Resource Identifier (URI), it silently ignores Transport Layer Security (TLS) options, such as custom Certificate Authorities (CAs). This allows a remote attacker to perform a Man-in-the-Middle (MITM) attack, intercepting and tampering with HTTPS communications. The connection falls back to Node.js's default trust store, bypassing intended security configurations and potentially leading to information disclosure or arbitrary code execution. ## Vendor advisories - **RHSA-2026:48151** · Red Hat · fixed in: Cryostat 4 on RHEL 9 · released 2026-07-29 · [advisory](https://access.redhat.com/errata/RHSA-2026:48151) - **RHSA-2026:35841** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10) · released 2026-07-06 · [advisory](https://access.redhat.com/errata/RHSA-2026:35841) - **RHSA-2026:39868** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8) · released 2026-07-15 · [advisory](https://access.redhat.com/errata/RHSA-2026:39868) - **RHSA-2026:35891** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9) · released 2026-07-06 · [advisory](https://access.redhat.com/errata/RHSA-2026:35891) - **RHSA-2026:34342** · Red Hat · fixed in: Cluster Observability Operator 1.5.0 · released 2026-07-01 · [advisory](https://access.redhat.com/errata/RHSA-2026:34342) - **RHSA-2026:36754** · Red Hat · fixed in: Red Hat Developer Hub 1.10 · released 2026-07-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:36754) - **RHSA-2026:41929** · Red Hat · fixed in: Red Hat Developer Hub 1.9 · released 2026-07-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:41929) - **RHSA-2026:38236** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-07-11 · [advisory](https://access.redhat.com/errata/RHSA-2026:38236) - **RHSA-2026:7378** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-04-10 · [advisory](https://access.redhat.com/errata/RHSA-2026:7378) - **RHSA-2026:22380** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-06-02 · [advisory](https://access.redhat.com/errata/RHSA-2026:22380) - **RHSA-2026:22934** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-06-03 · [advisory](https://access.redhat.com/errata/RHSA-2026:22934) - **Red Hat VEX** · Important · affected: Cryostat 4, OpenShift Pipelines, Red Hat Build of Podman Desktop, Red Hat OpenShift AI (RHOAI), Self-service automation portal 2 · no fix planned: Cryostat 4, OpenShift Pipelines, Red Hat Build of Podman Desktop, Red Hat OpenShift AI (RHOAI), … · updated 2026-09-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-9697.json) **undici: undici: Man-in-the-Middle attack via ignored TLS options with SOCKS5 proxy** — rated Important by Red Hat. Released 2026-06-17, updated 2026-09-18. Affected: - Cryostat 4 - OpenShift Pipelines - Red Hat Build of Podman Desktop - Red Hat OpenShift AI (RHOAI) - Self-service automation portal 2 Fixed: - Cryostat 4 on RHEL 9 - Red Hat Enterprise Linux AppStream (v. 10) - Red Hat Enterprise Linux AppStream (v. 8) - Red Hat Enterprise Linux AppStream (v. 9) - Cluster Observability Operator 1.5.0 - Red Hat Developer Hub 1.10 - Red Hat Developer Hub 1.9 - Red Hat Hardened Images - Red Hat OpenShift AI 2.25 - Red Hat OpenShift AI 3.4 - Red Hat OpenShift Container Platform 4.16 - Red Hat OpenShift Container Platform 4.17 - Red Hat OpenShift Dev Spaces 3.29 - Red Hat Openshift Data Foundation 4.18 - Red Hat Openshift Data Foundation 4.19 - Red Hat Openshift Data Foundation 4.20 No fix planned: - Cryostat 4 - OpenShift Pipelines - Red Hat Build of Podman Desktop - Red Hat OpenShift AI (RHOAI) - Self-service automation portal 2 Not affected: - Cryostat 4 on RHEL 9 - Cluster Observability Operator 1.5.0 - Red Hat Developer Hub 1.10 - Red Hat Developer Hub 1.9 - Red Hat OpenShift AI 2.25 - Red Hat OpenShift AI 3.4 - Red Hat OpenShift Container Platform 4.16 - Red Hat OpenShift Container Platform 4.17 - Red Hat OpenShift Dev Spaces 3.29 - Red Hat Openshift Data Foundation 4.18 ## Remediation Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258 https://access.redhat.com/errata/RHSA-2026:48151 For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 https://access.redhat.com/errata/RHSA-2026:35841 For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 https://access.redhat.com/errata/RHSA-2026:39868 Workarounds / mitigations: - 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. ## Package advisory (CVE-2026-9697) Affected packages: - `undici >= 7.23.0, < 7.28.0` - `undici >= 8.0.0, < 8.5.0` Patched in: - `undici 7.28.0` - `undici 8.5.0` Source: https://github.com/advisories/GHSA-vmh5-mc38-953g