CVE-2026-34356: Apache HTTP Server: ProxyPassReverseCookieMap buffer overflow

Overview

Severity

High (CVSS 7.5)

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U

Exploit Status

Not Exploited

Patch Tuesday

2026-Jun

Released

2026-06-11

Last Updated

2026-06-23

EPSS Score

0.71% (percentile: 51.2%)

Affected Products (1)

Other

• 21442-17084

Revision History

• 2026-06-11: Information published.
• 2026-06-23: Information published.