{"id":"CVE-2026-55553","title":"urllib is an HTTP client for Node.js that supports authentication, redirects, timeouts, and other request features","summary":"urllib is an HTTP client for Node.js that supports authentication, redirects, timeouts, and other request features. Prior to 4.9.1 and 2.44.1, urllib follows redirects through followRedirect but reuses caller-supplied options across orig…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-200","CWE-201","CWE-522"],"vendor":"urllib","product":"urllib","affected":["urllib >= 3.0.0, <= 4.9.0","urllib <= 2.44.0"],"patched":["urllib 4.9.1","urllib 2.44.1"],"published":"2026-08-25","updated":"2026-09-09","sourceUpdated":"2026-09-09T21:07:31.353","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-55553","references":[{"url":"https://github.com/node-modules/urllib/commit/7c86c465883ebd3dea5109c87d7bbe3b00960a16","label":"security-advisories@github.com"},{"url":"https://github.com/node-modules/urllib/commit/811a8d56e64e540bf6a19bf8b3737692f05d5c46","label":"security-advisories@github.com"},{"url":"https://github.com/node-modules/urllib/pull/812","label":"security-advisories@github.com"},{"url":"https://github.com/node-modules/urllib/pull/813","label":"security-advisories@github.com"},{"url":"https://github.com/node-modules/urllib/releases/tag/v2.44.1","label":"security-advisories@github.com"},{"url":"https://github.com/node-modules/urllib/releases/tag/v4.9.1","label":"security-advisories@github.com"},{"url":"https://github.com/node-modules/urllib/security/advisories/GHSA-hq3h-g68c-hp78","label":"security-advisories@github.com"},{"url":"https://github.com/node-modules/urllib/security/advisories/GHSA-hq3h-g68c-hp78","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://github.com/advisories/GHSA-hq3h-g68c-hp78"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-55553.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-55553"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2523609"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-55553"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55553"},{"url":"https://access.redhat.com/errata/RHSA-2026:69248"}],"tags":["nvd","ghsa","npm","csaf","vex","red-hat"],"epss":0.0037,"epssPercentile":0.30738,"aliases":["GHSA-hq3h-g68c-hp78"],"ecosystem":"npm","ingestedAt":"2026-08-25T16:28:50.861Z","slug":"CVE-2026-55553","body":"## Overview\n\nurllib is an HTTP client for Node.js that supports authentication, redirects, timeouts, and other request features. Prior to 4.9.1 and 2.44.1, urllib follows redirects through followRedirect but reuses caller-supplied options across origins. In src/HttpClient.ts, #requestInternal recursively calls this.#requestInternal(nextUrl.href, options, requestContext), causing options.headers and auth or digestAuth values to be reused when the redirect target has a different scheme, host, or port. Authorization, Cookie, Proxy-Authorization, x-api-key, x-auth-token, and x-access-token can therefore be sent to an attacker-controlled redirected origin, exposing credentials intended for the original origin and potentially allowing reuse against the original partner API or related services. No user interaction is required. This issue is fixed in versions 2.44.1 and 4.9.1.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-55553)\n\nAffected packages:\n\n- `urllib >= 3.0.0, <= 4.9.0`\n- `urllib <= 2.44.0`\n\nPatched in:\n\n- `urllib 4.9.1`\n- `urllib 2.44.1`\n\nSource: https://github.com/advisories/GHSA-hq3h-g68c-hp78\n\n## Vendor advisories\n\n- **RHSA-2026:69248** · Red Hat · fixed in: Red Hat Developer Hub 1.9 · released 2026-09-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:69248)\n- **Red Hat VEX** · Important · affected: Red Hat Developer Hub, Self-service automation portal 2 · no fix planned: Red Hat Developer Hub, Self-service automation portal 2 · updated 2026-09-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-55553.json)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}