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CURL-CVE-2026-6253
No affected components available
curl might erroneously pass on credentials for a first proxy to a second proxy.
This can happen when the following conditions are true:
- curl is setup to use specific different proxies for different URL schemes
- the first proxy needs credentials
- the second proxy uses no credentials
- while using the first proxy (using say
http://), curl is asked to follow a redirect to a URL using another scheme (sayhttps://), accessed using a second, different, proxy
Measures severity based on intrinsic characteristics of the vulnerability, independent of environment.
No exploitation activity has been observed at this time. Continue routine monitoring.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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