MEDIUM

CVE-2026-34356

Apache HTTP Server: ProxyPassReverseCookieMap buffer overflow

CVSS v3

7.5

MEDIUM

EPSS Score

0.7 %

exploit probability

CISA KEV

known exploited

Exploitation

none

SSVC status

Description

Microsoft Security Update (CVE-2026-34356)

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U
Published: 2026-06-19
MSRC Title: Apache HTTP Server: ProxyPassReverseCookieMap buffer overflow

Frequently asked questions

What is CVE-2026-34356?

Microsoft Security Update (CVE-2026-34356)

Is CVE-2026-34356 actively exploited?

Active exploitation of CVE-2026-34356 has not been confirmed. The EPSS score is 0.7%, indicating the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-34356?

CVE-2026-34356 has a CVSS v3 base score of 7.5 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U.

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