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CURL-CVE-2022-30115

Published May 11, 2022·Last modified Apr 25, 2026
Affected Components(0)

No affected components available

Description

curl's HSTS check could be bypassed to trick it to keep using HTTP.

Using its HSTS support, curl can be instructed to use HTTPS directly instead of using an insecure clear-text HTTP step even when HTTP is provided in the URL. This mechanism could be bypassed if the hostname in the given URL used a trailing dot while not using one when it built the HSTS cache. Or the other way around - by having the trailing dot in the HSTS cache and not using the trailing dot in the URL.

Since trailing dots in hostnames are somewhat special, many sites work equally fine with or without a trailing dot present.

Risk Scores
Base Score
0.0

Measures severity based on intrinsic characteristics of the vulnerability, independent of environment.

Threat Intelligence
0.0

No exploitation activity has been observed at this time. Continue routine monitoring.

EPSS
1.19%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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