rclone before v1.75.0 Credential Exposure via S3 Redirect

{
  "id": "52eb6928b99acfa443dd7efbb34f3e830e2df956644a8aa2b985f6b97de55f3d",
  "url": "https://osv.dev/vulnerability/CVE-2026-79780",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "rclone before v1.75.0 Credential Exposure via S3 Redirect",
    "summary": "rclone before v1.75.0 fails to sanitize IBM IAM bearer tokens and SSE-C encryption keys during S3 redirect callbacks, allowing credentials to be preserved across scheme or host changes. Attackers observing network traffic from a trusted endpoint can capture reusable IBM IAM tokens on same-host HTTPS-to-HTTP downgrades or SSE-C keys on cross-origin redirects to access protected S3 objects.",
    "evidence": "osv:CVE-2026-79780",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-79780",
      "aliases": [
        "BIT-rclone-2026-79780",
        "CVE-2026-79780",
        "GHSA-8mxv-9xhp-86h4",
        "GO-2026-6188"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/rclone/rclone",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "9ee9d0a0cafd5e5fe3b271d2280b090ab6e64048"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.75.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.75.0"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.74.0",
            "v1.73.0",
            "v1.72.0",
            "v1.71.0",
            "v1.70.0",
            "v1.69.0",
            "v1.68.0",
            "v1.67.0",
            "v1.66.0",
            "v1.65.0",
            "v1.64.0",
            "v1.63.0",
            "v1.62.0",
            "v1.61.0",
            "v1.60.0",
            "v1.59.0",
            "v1.58.0",
            "v1.57.0",
            "v1.56.0",
            "v1.55.0",
            "v1.54.0",
            "v1.53.0",
            "v1.52.0",
            "v1.51.0",
            "v1.50.0",
            "v1.49.0",
            "v1.48.0",
            "v1.47.0",
            "v1.46.0",
            "v1.46",
            "v1.45",
            "v1.44",
            "v1.43",
            "v1.42",
            "v1.41",
            "v1.40",
            "v1.39",
            "v1.38",
            "v1.37",
            "v1.36",
            "v1.35",
            "v1.34",
            "v1.33",
            "v1.32",
            "v1.31",
            "v1.30",
            "v1.29-1-gbb75d80",
            "v1.29",
            "v1.28",
            "v1.27",
            "v1.26",
            "v1.25",
            "v1.24",
            "v1.23",
            "v1.22",
            "v1.21",
            "v1.20",
            "v1.19",
            "v1.18",
            "v1.17",
            "v1.16",
            "v1.15",
            "v1.14",
            "v1.13",
            "v1.12",
            "v1.11",
            "v1.10",
            "v1.09",
            "v1.08",
            "v1.07",
            "v1.06",
            "v1.05",
            "v1.04",
            "v1.03",
            "v1.01",
            "v1.00",
            "v0.99",
            "v0.98",
            "v0.97",
            "v0.96",
            "v0.95",
            "v0.94",
            "v0.93",
            "v0.92",
            "v0.91",
            "v0.90"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-79780.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:24.847157102Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/79xxx/CVE-2026-79780.json",
        "https://github.com/rclone/rclone/security/advisories/GHSA-8mxv-9xhp-86h4",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-79780",
        "https://www.vulncheck.com/advisories/rclone-before-credential-exposure-via-s3-redirect"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-200"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/79xxx/CVE-2026-79780.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-79780",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 491440,
  "published_at": "2026-08-25T15:16:09.789+00:00"
}