CVE-2026-43951CWE-125

Apache HTTP Server: OOB Read in `merge_response_headers` can cause crash

Medium · published June 8, 2026

CVSS v3.1
6.5
EPSS
1%
Percentile
63.8
In the wild
Unconfirmed
What it is

Out-of-bounds Read vulnerability in Apache HTTP Server with mod_headers and mod_mime and multiple response languages.

This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.01043 · 63.8th percentile
Weakness
CWE-125 · Out-of-bounds Read
Published
2026-06-08T15:16Z
EPSS history
Timeline
  • 08 JUN 15:16Z
    Apache HTTP Server: OOB Read in `merge_response_headers` can cause crash
    cvelistv5