{"id":"GHSA-9mph-vxjp-r3rx","revision":null,"records":[{"revision":"df8b21c45ff44eda974d9cadd9605b57","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-79779","aliases":[],"title":"rclone before v1.75.0 WebDAV Credential Exposure via HTTPS-to-HTTP Redirect","description":"rclone versions before v1.75.0 fail to reject transport downgrades in redirect handling, allowing Basic authorization and Cookie headers to be replayed over plaintext HTTP after same-host HTTPS-to-HTTP redirects. 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Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-79779","identifiers":["CVE-2026-79779"]},"retained":false,"historicalAffected":[]},{"revision":"b7926d7cdf454a21bd10aa745f0c9323","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-h4mf-4v27-hggj","aliases":["BIT-rclone-2026-79779","CVE-2026-79779","GO-2026-6197"],"title":"rclone: WebDAV Credentials Survive a Same-Host HTTPS-to-HTTP Redirect","description":"## 1. Summary\n\nWebDAV's default redirect handling can replay Basic authorization and configured Cookie headers over plaintext HTTP after a same-host HTTPS-to-HTTP redirect. This was reproduced through the real backend. Unlike the low-impact STS token in rclone's published S3 redirect advisory, Basic passwords and session cookies are complete reusable credentials, supporting a High rating when they grant normal WebDAV read/write access.\n\nThe credible threat requires a legitimate endpoint, gateway, or accelerator to emit an unsafe redirect and an adjacent/on-path actor to observe the plaintext hop. A report should not rely on a malicious original WebDAV endpoint because that endpoint already receives the credentials.\n\n## 2. Affected Assets & Attack Surface\n\n- Backend configuration/authentication: `backend/webdav/webdav.go:127-139`, `170-206`, `440-530`\n- Shared redirect callback: `lib/rest/rest.go:218-231`\n- HTTP client: `fs/fshttp/http.go:311-329`\n- Credentials: Basic passwords, bearer authorization, SharePoint/session cookies, and configured secret headers\n- Confirmed affected version: `<= v1.74.0-240`\n\n## 3. Technical Root Cause Analysis\n\n`PreserveMethodRedirectFn` limits redirect count and restores the original method, but it does not reject a transport downgrade or compare the full origin tuple. The client therefore relies on Go's hostname-oriented sensitive-header forwarding rules. Those rules can preserve `Authorization` and Cookie on a same-host redirect even when the new scheme is plaintext HTTP.\n\n## 4. Proof-of-Concept & Evidence\n\n1. Configure the actual WebDAV backend with Basic credentials and a Cookie.\n2. Have the TLS endpoint return `307 Temporary Redirect` to an HTTP listener on the same hostname and a different port.\n3. rclone follows the redirect while preserving the WebDAV method.\n4. The plaintext listener receives both the Basic `Authorization` value and Cookie.\n\n## 5. Impact Assessment\n\nAn on-path observer can reuse the captured password, bearer token, or session cookie for the account's permitted WebDAV operations. Confidentiality, integrity, and availability impact depend on that account's permissions.\n\n## 6. Remediation Guidance\n\n- Reject every HTTPS-to-HTTP redirect before replay.\n- Forward authenticated requests by default only when scheme, hostname, and effective port are unchanged.\n- Strip authorization, cookies, proxy credentials, and configured secret headers on all other redirects.\n- Put necessary provider exceptions behind exact destination allowlists.\n- Cover `301`, `302`, `303`, `307`, and `308` in regression tests.","state":0,"publishedAt":"2026-08-05T20:36:10+00:00","modifiedAt":"2026-09-25T14:25:56.7106014+00:00","affected":[{"ecosystem":"Go","name":"github.com/rclone/rclone","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.75.0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/rclone/rclone/security/advisories/GHSA-h4mf-4v27-hggj","https://github.com/rclone/rclone/commit/59b513b0e74fd2943ccbb8891d5ce00f860e6d26","https://github.com/rclone/rclone","https://github.com/rclone/rclone/releases/tag/v1.75.0"],"sourceUrl":"https://github.com/advisories/GHSA-h4mf-4v27-hggj","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-h4mf-4v27-hggj","identifiers":["GHSA-h4mf-4v27-hggj","BIT-rclone-2026-79779","CVE-2026-79779","GO-2026-6197"]},"retained":false,"historicalAffected":[]},{"revision":"d746adb828464ce281d8c21aff022254","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2026-6197","aliases":["BIT-rclone-2026-79779","CVE-2026-79779","GHSA-h4mf-4v27-hggj"],"title":"WebDAV credential leakage on HTTPS to HTTP redirect in github.com/rclone/rclone","description":"WebDAV credential leakage on HTTPS to HTTP redirect in github.com/rclone/rclone","state":0,"publishedAt":"2026-08-18T16:38:10+00:00","modifiedAt":"2026-09-25T14:25:56.7106014+00:00","affected":[{"ecosystem":"Go","name":"github.com/rclone/rclone","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.75.0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://github.com/rclone/rclone/security/advisories/GHSA-h4mf-4v27-hggj","https://github.com/rclone/rclone/commit/59b513b0e74fd2943ccbb8891d5ce00f860e6d26","https://github.com/rclone/rclone/releases/tag/v1.75.0"],"sourceUrl":"https://osv.dev/vulnerability/GO-2026-6197","license":"OSV · upstream source license applies","key":"osv:GO-2026-6197","identifiers":["GO-2026-6197","BIT-rclone-2026-79779","CVE-2026-79779","GHSA-h4mf-4v27-hggj"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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