CVE-2021-26691

CRITICAL

Apache HTTP Server < 2.4.46 - Out-of-Bounds Write

Title source: rule

Description

In Apache HTTP Server versions 2.4.0 to 2.4.46 a specially crafted SessionHeader sent by an origin server could cause a heap overflow

Exploits (1)

References (13)

Scores

CVSS v3 9.8
EPSS 0.4036
EPSS Percentile 97.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-122 CWE-787
Status published
Products (12)
apache/http_server 2.4.0 - 2.4.46
debian/debian_linux 9.0
debian/debian_linux 10.0
fedoraproject/fedora 34
fedoraproject/fedora 35
netapp/cloud_backup
oracle/enterprise_manager_ops_center 12.4.0.0
oracle/instantis_enterprisetrack 17.1
oracle/instantis_enterprisetrack 17.2
oracle/instantis_enterprisetrack 17.3
... and 2 more
Published Jun 10, 2021
Tracked Since Feb 18, 2026