CVE-2026-86409 affecting package rust 1.96.1-2

{
  "id": "08af00da856a868cd83ee1dd36a9a4ce9be4fd8d4fa15ff5c56370b0ea92bc3b",
  "url": "https://osv.dev/vulnerability/AZL-110256",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-86409 affecting package rust 1.96.1-2",
    "summary": "Setting `CURLOPT_AWS_SIGV4` to NULL but does not disable SigV4 authentication, contrary to expectations and documentation. A subsequent transfer on the same handle still sends an `Authorization: AWS4-HMAC-SHA256` header to whatever URL isset next, leaking state information.",
    "evidence": "osv:AZL-110256",
    "products": [
      {
        "name": {
          "value": "rust",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "AZL-110256",
      "aliases": [
        "AZL-110256"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "1.85.0"
                },
                {
                  "last_affected": "1.96.1-2"
                }
              ]
            }
          ],
          "package": {
            "name": "rust",
            "purl": "pkg:rpm/azure-linux/rust",
            "ecosystem": "Azure Linux:3"
          },
          "database_specific": {
            "source": "https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-110256.json"
          }
        }
      ],
      "modified": "2026-10-27T05:36:16Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-86409"
      ],
      "references": [
        "https://nvd.nist.gov/vuln/detail/CVE-2026-86409"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-86409",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 460608,
  "published_at": "2026-10-20T20:17:25+00:00"
}