CVE-2026-6276EPSS p26.2%
CVE-2026-6276CVE-2026-6276
haxx / curl
Description
Using libcurl, when a custom `Host:` header is first set for an HTTP request
and a second request is subsequently done using the same *easy handle* but
without the custom `Host:` header set, the second request would use stale
information and pass on cookies meant for the first host in the second
request. Leak them.
Scoring
| CVSS | 7.5 () |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| EPSS | 0.35% probability of exploitation · percentile 26.2% · 2026-10-05T12:00:23Z |
| Last modified | 2026-09-15 |