{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-6734","assignerOrgId":"ce714d77-add3-4f53-aff5-83d477b104bb","state":"PUBLISHED","assignerShortName":"openjs","dateReserved":"2026-04-20T22:57:40.878Z","datePublished":"2026-06-17T16:36:55.439Z","dateUpdated":"2026-07-10T12:06:08.979Z"},"containers":{"cna":{"providerMetadata":{"orgId":"ce714d77-add3-4f53-aff5-83d477b104bb","shortName":"openjs","dateUpdated":"2026-06-17T16:36:55.439Z"},"descriptions":[{"lang":"en","value":"Impact:\nWhen using Socks5ProxyAgent, undici reuses a single connection pool across different origins without verifying that the pool's origin matches the requested origin. All requests are dispatched through the pool connected to the first origin, regardless of the intended destination.\n\nThis causes cross-origin request routing: credentials and request data intended for origin B are sent to origin A, responses from the wrong origin are trusted, and HTTPS requests may be silently downgraded to HTTP.\n\nImpacted users are applications that use Socks5ProxyAgent (directly or via setGlobalDispatcher) and make requests to more than one origin.\n\nThis was introduced in undici 7.23.0 via PR #4385 and affects all versions through 8.1.0.\n\nPatches:\nUpgrade to undici v7.26.0 or v8.2.0.\n\nWorkarounds:\nUse a separate Socks5ProxyAgent instance per origin, or avoid using Socks5ProxyAgent with multiple origins.","supportingMedia":[{"type":"text/html","base64":false,"value":"Impact:\nWhen using Socks5ProxyAgent, undici reuses a single connection pool across different origins without verifying that the pool's origin matches the requested origin. All requests are dispatched through the pool connected to the first origin, regardless of the intended destination.\n\nThis causes cross-origin request routing: credentials and request data intended for origin B are sent to origin A, responses from the wrong origin are trusted, and HTTPS requests may be silently downgraded to HTTP.\n\nImpacted users are applications that use Socks5ProxyAgent (directly or via setGlobalDispatcher) and make requests to more than one origin.\n\nThis was introduced in undici 7.23.0 via PR #4385 and affects all versions through 8.1.0.\n\nPatches:\nUpgrade to undici v7.26.0 or v8.2.0.\n\nWorkarounds:\nUse a separate Socks5ProxyAgent instance per origin, or avoid using Socks5ProxyAgent with multiple origins."}]}],"affected":[{"vendor":"undici","product":"undici","defaultStatus":"unaffected","versions":[{"versionType":"semver","status":"affected","version":"7.23.0","lessThan":"7.26.0"},{"versionType":"semver","status":"unaffected","version":"7.26.0"},{"versionType":"semver","status":"affected","version":"8.0.0","lessThan":"8.2.0"},{"versionType":"semver","status":"unaffected","version":"8.2.0"}],"packageURL":"pkg:npm/undici"}],"references":[{"url":"https://github.com/nodejs/undici/security/advisories/GHSA-hm92-r4w5-c3mj"},{"url":"https://cna.openjsf.org/security-advisories.html"}],"credits":[{"lang":"en","type":"reporter","value":"ChALkeR"},{"lang":"en","type":"remediation reviewer","value":"mcollina"},{"lang":"en","type":"remediation verifier","value":"UlisesGascon"},{"lang":"en","type":"finder","value":"deepview-autofix"}],"title":"undici vulnerable to cross-origin request routing via SOCKS5 proxy pool reuse","metrics":[{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.5,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-346","lang":"en","description":"CWE-346: Origin Validation Error","type":"CWE"}]}],"x_generator":{"engine":"cve-kit 1.0.0"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-22T00:00:00+00:00","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3","id":"CVE-2026-6734"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-06-23T03:56:04.784Z"}},{"affected":[{"cpes":["cpe:/o:redhat:enterprise_linux:10.2"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux AppStream (v. 10)","vendor":"Red 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Hat"},{"cpes":["cpe:/a:redhat:podman_desktop:1"],"defaultStatus":"affected","product":"Red Hat Build of Podman Desktop","vendor":"Red Hat"},{"cpes":["cpe:/o:redhat:enterprise_linux:8"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:openshift_ai"],"defaultStatus":"affected","product":"Red Hat OpenShift AI (RHOAI)","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:openshift:4"],"defaultStatus":"affected","product":"Red Hat OpenShift Container Platform 4","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:openshift_data_foundation:4"],"defaultStatus":"affected","product":"Red Hat Openshift Data Foundation 4","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:openshift_devspaces:3"],"defaultStatus":"affected","product":"Red Hat OpenShift Dev Spaces","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:ansible_portal:2"],"defaultStatus":"affected","product":"Self-service automation portal 2","vendor":"Red 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When using Socks5ProxyAgent, undici incorrectly reuses a single connection pool across different origins. This can lead to cross-origin request routing, where sensitive credentials and data intended for one destination are sent to another. Consequently, responses from unintended origins may be trusted, and secure HTTPS connections could be silently downgraded to unencrypted HTTP, resulting in information disclosure and data integrity issues."}],"metrics":[{"other":{"content":{"namespace":"https://access.redhat.com/security/updates/classification/","value":"Important"},"type":"Red Hat severity rating"}},{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"format":"CVSS"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-940","description":"Improper Verification of Source of a Communication Channel","lang":"en","type":"CWE"}]}],"references":[{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-6734"},{"name":"RHBZ#2490024","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2490024"},{"tags":["x_sadp-csaf-vex"],"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-6734.json"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:35841"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:35891"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:34342"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:36754"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:7378"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:22380"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:22934"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:36820"}],"solutions":[{"lang":"en","value":"RHSA-2026:35841: Red Hat Enterprise Linux AppStream (v. 10)"},{"lang":"en","value":"RHSA-2026:35891: Red Hat Enterprise Linux AppStream (v. 9)"},{"lang":"en","value":"RHSA-2026:34342: Cluster Observability Operator 1.5.0"},{"lang":"en","value":"RHSA-2026:36754: Red Hat Developer Hub 1.10"},{"lang":"en","value":"RHSA-2026:7378: Red Hat Hardened Images"},{"lang":"en","value":"RHSA-2026:22380: Red Hat Hardened Images"},{"lang":"en","value":"RHSA-2026:22934: Red Hat Hardened Images"},{"lang":"en","value":"RHSA-2026:36820: Red Hat OpenShift Dev Spaces 3.29"}],"timeline":[{"lang":"en","time":"2026-06-17T19:04:00.272Z","value":"Reported to Red Hat."},{"lang":"en","time":"2026-06-17T16:36:55.439Z","value":"Made public."}],"title":"undici: undici: Information disclosure and data integrity issues due to incorrect Socks5ProxyAgent connection routing","workarounds":[{"lang":"en","value":"The single most impactful mitigation is applying network egress controls to restrict which external destinations affected applications can reach. Because the vulnerability causes requests to be misrouted to wrong origins, limiting the set of reachable origins directly reduces the attack surface. These controls collectively limit the blast radius of the connection pool misrouting — the attacker must compromise one of the explicitly allowed destinations rather than any arbitrary origin — but they do not fix the underlying logic bug."}],"x_adpType":"supplier","x_generator":{"engine":"sadp-cli 1.0.0"},"providerMetadata":{"orgId":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c","shortName":"redhat-SADP","dateUpdated":"2026-07-10T12:06:08.979Z"}}]}}