CVE-2026-86409

Name of the Vulnerable Software and Affected Versions curl (affected versions not specified)

Description Setting CURLOPT AWS SIGV4 to NULL fails to disable SigV4 authentication as expected and documented. Consequently, a subsequent transfer using the same handle continues to send the Authorization: AWS4-HMAC-SHA256 header to the next specified URL, which leads to the leakage of state information.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.