{"id":"CVE-2025-21620","summary":"Deno's authorization headers not dropped when redirecting cross-origin","details":"Deno is a JavaScript, TypeScript, and WebAssembly runtime with secure defaults. When you send a request with the Authorization header to one domain, and the response asks to redirect to a different domain, Deno'sfetch() redirect handling creates a follow-up redirect request that keeps the original Authorization header, leaking its content to that second domain. This vulnerability is fixed in 2.1.2.","aliases":["GHSA-f27p-cmv8-xhm6"],"modified":"2026-08-12T03:51:13.376148778Z","published":"2025-01-06T22:26:40.723Z","database_specific":{"cwe_ids":["CWE-200"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21620.json","cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21620.json"},{"type":"ADVISORY","url":"https://github.com/denoland/deno/security/advisories/GHSA-f27p-cmv8-xhm6"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-21620"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/denoland/deno","events":[{"introduced":"0"},{"fixed":"2039abe8d2bc82fa800f4118707a48ac6f5e02ae"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"2.1.2"}],"source":"AFFECTED_FIELD"}}],"versions":["v2.1.1","v2.1.0","v2.0.0","v1.46.0","v1.45.0","v1.44.0","v1.43.1","v1.43.0","v1.42.0","v1.41.0","v1.40.0","v1.39.0","v1.38.0","v1.37.0","v1.36.0","v1.35.0","v1.34.0","v1.33.0","v1.32.0","v1.31.0","v1.30.0","v1.29.0","v1.28.0","v1.27.0","v1.26.0","v1.25.0","v1.24.0","v1.23.0","v1.22.0","v1.21.0","v1.20.1","v1.20.0","v1.19.0","v1.18.0","v1.17.0","v1.16.2","v1.16.1","v1.16.0","v1.15.3","v1.15.2","v1.15.1","v1.15.0","v1.14.2","v1.14.1","v1.14.0","v1.13.2","v1.13.1","v1.13.0","v1.12.2","v1.12.1","v1.12.0","v1.11.2","v1.11.1","v1.11.0","v1.10.1","v1.10.0","v1.9.2","v1.9.1","v1.9.0","v1.8.2","v1.8.1","v1.8.0","v1.7.4","v1.7.3","v1.7.2","v1.7.1","std/0.85.0","v1.7.0","std/0.84.0","v1.6.3","std/0.83.0","v1.6.2","std/0.82.0","v1.6.1","std/0.81.0","v1.6.0","std/0.80.0","v1.5.4","std/0.79.0","v1.5.3","std/0.78.0","v1.5.2","std/0.77.0","v1.5.1","std/0.76.0","v1.5.0","std/0.75.0","v1.4.6","v1.4.5","std/0.74.0","v1.4.4","std/0.73.0","v1.4.3","std/0.72.0","v1.4.2","std/0.71.0","v1.4.1","std/0.70.0","v1.4.0","std/0.69.0","v1.3.3","std/0.68.0","v1.3.2","std/0.67.0","v1.3.1","std/0.66.0","v1.3.0","std/0.65.0","v1.2.3","std/0.64.0","v1.2.2","std/0.63.0","v1.2.1","std/0.62.0","v1.2.0","std/0.61.0","v1.1.3","std/0.60.0","v1.1.2","std/0.59.0","v1.1.1","std/0.58.0","v1.1.0","std/0.57.0","v1.0.5","std/0.56.0","v1.0.4","std/0.55.0","v1.0.3","std/0.54.0","v1.0.2","std/0.53.0","v1.0.1","std/0.52.0","std/0.51.0","v1.0.0","v1.0.0-rc3","v1.0.0-rc2","std/0.50.0","v1.0.0-rc1","v0.42.0","std/0.42.0","v0.41.0","std/0.41.0","v0.40.0","std/0.40.0","v0.39.0","std/0.39.0","v0.38.0","std/0.38.0","v0.37.1","v0.37.0","std/0.37.0","v0.36.0","std/0.36.0","v0.35.0","std/0.35.0","v0.34.0","std/0.34.0","v0.33.0","v0.32.0","v0.31.0","v0.30.1","v0.30.0","v0.29.0","v0.28.1","v0.28.0","v0.27.0","v0.26.0","v0.25.0","v0.24.0","v0.23.0","v0.22.0","v0.21.0","v0.20.0","v0.19.0","v0.18.0","v0.17.0","v0.16.0","v0.15.0","v0.14.0","v0.13.0","v0.12.0","v0.11.0","v0.10.0","v0.9.0","v0.8.0","v0.7.0","v0.6.0","v0.5.0","v0.4.0","v0.3.11","v0.3.10","v0.3.9","v0.3.8","v0.3.7","v0.3.6","v0.3.5","v0.3.4","v0.3.3","v0.3.2","v0.3.1","v0.3.0","v0.2.11","v0.2.10","v0.2.9","v0.2.8","v0.2.7","v0.2.6","v0.2.5","v0.2.4","v0.2.3","v0.2.2","v0.2.1","v0.2.0","v0.1.12","v0.1.11","v0.1.10","v0.1.9","v0.1.8","v0.1.7","v0.1.6","v0.1.5","v0.1.4","v0.1.3","v0.1.2","v0.1.1","v0.1.0","v0.0.3","v0.0.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-21620.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"}]}