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An authentication bypass vulnerability exists in libcurl prior to v8.0.0 where it reuses a previously established SSH connection despite the fact that an SSH option was modified which should have prevented reuse. libcurl maintains a pool of previously used connections to reuse them for subsequent transfers if the configurations match. However two SSH settings were omitted from the configuration check allowing them to match easily potentially leading to the reuse of an inappropriate connection.

🗓️ 01 Apr 2023 07:00:00Reported by MicrosoftType 
mscve
 mscve
🔗 msrc.microsoft.com👁 1 Views

Authentication bypass in libcurl before version eight point zero allows reusing a secure shell connection.

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18 Feb 2026 09:18Current
6.6Medium risk
Vulners AI Score6.6
CVSS 3.15.5 - 7.7
EPSS0.01162
SSVC
1