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CURL-CVE-2025-9086
No affected components available
- A cookie is set using the
securekeyword forhttps://target - curl is redirected to or otherwise made to speak with
http://target(same hostname, but using clear text HTTP) using the same cookie set - The same cookie name is set - but with only a slash as path (
path="/"). Since this site is not secure, the cookie should be ignored. - A bug in the path comparison logic makes curl read outside a heap buffer boundary
The bug either causes a crash or it potentially makes the comparison come to the wrong conclusion and lets the clear-text site override the contents of the secure cookie, contrary to expectations and depending on the memory contents immediately following the single-byte allocation that holds the path.
The presumed and correct behavior would be to plainly ignore the second set of the cookie since it was already set as secure on a secure host so overriding it on an insecure host should not be okay.
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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