๐Ÿ›ก๏ธ CVE-2026-6276
๐ŸŸ  CVSS 7.5 โ€” High โš ๏ธ Exploit Public CWE-319 NVD
7.5
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity HIGH
CVSS Score 7.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE CWE-319
Public Exploit โš ๏ธ Yes
Source NVD
Published 2026-05-13
Updated 2026-06-02
Modified 2026-05-14

Affected Packages

Software From version Fixed in
curl 7.71.0 8.20.0
unknown โ€” โ€”

References

Exploit, Issue Tracking, Third Party Advisory https://hackerone.com/reports/3671818
Exploit, Issue Tracking, Third Party Advisory https://hackerone.com/reports/3671818

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