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CVE Vulnerability Details :
CVE-2026-43951
PUBLISHED
More InfoOfficial Page
Assigner-apache
Assigner Org ID-f0158376-9dc2-43b6-827c-5f631a4d8d09
View Known Exploited Vulnerability (KEV) details
Published At-08 Jun, 2026 | 15:16
Updated At-08 Jun, 2026 | 22:32
Rejected At-
▼CVE Numbering Authority (CNA)
Apache HTTP Server: OOB Read in `merge_response_headers` can cause crash

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.

Affected Products
Vendor
The Apache Software FoundationApache Software Foundation
Product
Apache HTTP Server
Default Status
unaffected
Versions
Affected
  • From 2.4.0 through 2.4.67 (semver)
Problem Types
TypeCWE IDDescription
CWECWE-125CWE-125 Out-of-bounds Read
Type: CWE
CWE ID: CWE-125
Description: CWE-125 Out-of-bounds Read
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Textual description of severity
text:
moderate
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
finder
Zhenpeng (Leo) Lin at depthfirst
Timeline
EventDate
reported2026-04-27 12:00:00
fixed in 2.4.x by r19350062026-06-05 12:00:00
2.4.68 released2026-06-08 12:00:00
Event: reported
Date: 2026-04-27 12:00:00
Event: fixed in 2.4.x by r1935006
Date: 2026-06-05 12:00:00
Event: 2.4.68 released
Date: 2026-06-08 12:00:00
Replaced By
Rejected Reason
References
HyperlinkResource
https://httpd.apache.org/security/vulnerabilities_24.html
vendor-advisory
Hyperlink: https://httpd.apache.org/security/vulnerabilities_24.html
Resource:
vendor-advisory
▼Authorized Data Publishers (ADP)
1. CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
3.16.5MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Version: 3.1
Base score: 6.5
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
2. CVE Program Container
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
http://www.openwall.com/lists/oss-security/2026/06/08/10
N/A
Hyperlink: http://www.openwall.com/lists/oss-security/2026/06/08/10
Resource: N/A
Details not found