https://seclists.org/oss-sec/2026/q2/266: [ADVISORY] curl: CVE-2026-5545: wrong use of HTTP Negotiate connection
Published Apr 29, 2026
·Updated
Affected Software
2 affected components
curl libcurl>=7.10.6<=8.19.0
curl curl>=7.10.6<=8.19.0
Frequently Asked Questions
1
What is the severity of CVE-2026-5545?
CVE-2026-5545 has been rated as a moderate severity vulnerability due to potential authentication issues.
2
How do I fix CVE-2026-5545?
To fix CVE-2026-5545, update to the latest version of curl or libcurl that addresses this vulnerability.
3
What impact does CVE-2026-5545 have on users?
CVE-2026-5545 can potentially allow attackers to authenticate incorrectly by reusing the wrong HTTP Negotiate connection.
4
Is CVE-2026-5545 present in all versions of curl?
CVE-2026-5545 affects specific versions of curl and libcurl, so users should refer to the advisory for details on which versions are impacted.
5
When was CVE-2026-5545 disclosed?
CVE-2026-5545 was disclosed on April 29, 2026.