CVE WATCH / VULNERABILITY DETAIL
CVE-2026-86409
UNKNOWNCVSS 0NVD feed
Published 20 October 2026 · tracked since 21 October 2026
Description
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.
References
- NVD — National Vulnerability Database
- CVE.org record (MITRE)
- CISA Known Exploited Vulnerabilities catalog