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CVE WatchSep 6, 2026

CVE-2026-19931

A flaw in libcurl makes it wrongly reuse an HTTP connection setup for a given hostname using Negotiate authentication, when the initial requ

CVSS

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EPSS

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KEV

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Exploit Today

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0-100

Published: Sep 6, 2026 · Last modified: Sep 6, 2026

EPSS · 30d

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Technical description

A flaw in libcurl makes it wrongly reuse an HTTP connection setup for a given hostname using Negotiate authentication, when the initial request is done using empty credentials. This can make user B's request get sent over user A's previously authenticated connection.

Official references
Related CVEs

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