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CVE-2026-86409

unscored Published
NVD · CVE.org

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.

Fix

Vendor advisories in the News 1

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 4

  1. StatusAwaiting Analysis → PublishedNVD modified 2026-10-29 18:33
  2. StatusPublished → Awaiting AnalysisNVD modified 2026-10-22 17:21
  3. StatusReceived → PublishedNVD modified 2026-10-20 19:57
  4. First seenunscoredNVD modified 2026-10-20 20:17

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 3