ALPINE-CVE-2025-9086
1. A cookie is set using the `secure` keyword for `https://target` 2. curl is redirected to or otherwise made to speak with `http://target` (same hostname, but using clear text HTTP) using the same cookie set 3. The same cookie name is set - but with just a slash as path (`path=\"/\",`). Since this site is not secure, the cookie *should* just be ignored. 4. 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.
Risk Scores
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Alpine:v3.23 | curl | 8.1.0-r1, 8.1.0-r2, 7.86.0-r0 |
| Alpine:v3.22 | curl | 7.62.0-r0, 7.21.4-r1, 7.21.3-r0 |
| Alpine:v3.19 | curl | 0, 7.19.2-r1, 7.19.5-r0 |
| Alpine:v3.20 | curl | 7.21.7-r0, 7.21.7-r1, 7.21.7-r2 |
| Alpine:v3.21 | curl | 8.9.1-r2, 8.9.1-r1, 8.9.1-r0 |
Timeline
- Sep 12, 2025 CVE Published
- Jan 9, 2026 CVE Updated
- Apr 30, 2026 Distribution Patch