CVE-2026-34355 | BDVDB-2026-338570 Detail

ApacheApache HTTP Server

Description#

A buffer overflow in mod_proxy_html in Apache HTTP Server 2.4.67 and earlier allows an attack by an untrusted backend. Users are recommended to upgrade to version 2.4.68, which fixes this issue.

Impact#

Per CVSS v3.1: confidentiality impact none, integrity impact none, availability impact high. Attack vector: network.

Weaknesses#

CWE-122 Heap-based Buffer Overflow
CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

References#

Show all 16

https://access.redhat.com/errata/RHSA-2026:56869

Exploit#

No public exploit known

History#

Version 12026-06-08Record published in the CVE List.
Version 22026-09-14Most recent update recorded in the CVE List.

Published

Published: 2026-06-08
Last modified: 2026-09-14

Vendor information

Vendor: Apache
Product: Apache HTTP Server

All Apache vulnerabilities

Score

7.5 High

EPSS

1.1%, Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 67.4.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Memory Corruption

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
>= 2.4.0 and <= 2.4.67
Fixed
Not stated

Scoring System

CVSS v4.0

Not available

CVSS v3.1

7.5 High

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

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality	None
Integrity	None
Availability	High

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).