CVE-2023-23914: Haxx Curl

Critical severity, CVSS 9.1. EPSS: 0.9% chance of exploitation in the next 30 days.

A cleartext transmission of sensitive information vulnerability exists in curl <v7.88.0 that could cause HSTS functionality fail when multiple URLs are requested serially. Using its HSTS support, curl can be instructed to use HTTPS instead of usingan insecure clear-text HTTP step even when HTTP is provided in the URL. ThisHSTS mechanism would however surprisingly be ignored by subsequent transferswhen done on the same command line because the state would not be properlycarried on.

Affected products

• Haxx Curl: from 7.77.0, before 7.88.0 (fixed in 7.88.0)
• Netapp Active Iq Unified Manager: affected versions not specified
• Netapp Clustered Data Ontap: version 9.0 only
• Netapp h300s Firmware: affected versions not specified
• Netapp h410s Firmware: affected versions not specified
• Netapp h500s Firmware: affected versions not specified
• Netapp h700s Firmware: affected versions not specified
• Splunk Universal Forwarder: from 8.2.0, before 8.2.12 (fixed in 8.2.12); from 9.0.0, before 9.0.6 (fixed in 9.0.6); version 9.1.0 only

Published 2023-02-23. Last modified 2026-06-17.