CVE-2026-8932

libcurl would reuse a previously created connection even when some mTLS config related option had been changed that should have prohibited reuse. libcurl keeps previously used connections in a connection pool for subsequent transfers to reuse if one of them matches the setup. However, some TLS settings related to client certificates were left out from the configuration match checks, making them match too easily. In particular options related to the private key.

Affected products

Ibm Aix, Curl, Libcurl

Haxx Curl

< 8.21.0

Fix

Available

CVSS 3.1

7.5 HIGH

EPSS

0.4% (32th percentile)

NVD status

Analyzed

Published

2026-07-03