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CVE-2026-49975

55
FAUCET Score

Memory Allocation with Excessive Size Value vulnerability in Apache HTTP Server's mod_http leads to denial of service via malicious HTTP requests. This issue affects Apache HTTP Server: from 2.4.17 through 2.4.67.

First published: Jun 8, 2026Last modified: Jun 8, 2026

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.4.17, < 2.4.68CPE matchmatch criteria
cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*
11.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
>= 2.4.17, <= 2.4.67CPE match
cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
27.98%
Probability of exploitation in next 30 days
EPSS Percentile
97.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.2798 is in the 96th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (22)

apachepatch availablevia llm_extracted
Fixed in: 2.4
microsoftpatch availablevia msrc
Product: azl3 nginx 1.28.3-4 on Azure Linux 3.0Fixed in: 1.28.3-5
microsoftpatch availablevia msrc
Product: azl3 httpd 2.4.67-1 on Azure Linux 3.0Fixed in: 2.4.68-1
microsoftpatch availablevia msrc
Product: 21442-17084Fixed in: 2.4.68-1
microsoftpatch availablevia msrc
Product: 21448-17084Fixed in: 1.28.3-5
ubuntupatch availablevia ubuntu_usn
Product: nginx (noble)Fixed in: 1.24.0-2ubuntu7.10
ubuntupatch availablevia ubuntu_usn
Product: nginx (questing)Fixed in: 1.28.0-6ubuntu1.5
ubuntupatch availablevia ubuntu_usn
Product: nginx (resolute)Fixed in: 1.28.3-2ubuntu1.3
ubuntupatch availablevia ubuntu_usn
Product: nginx (xenial)Fixed in: 1.10.3-0ubuntu0.16.04.5+esm9
ubuntupatch availablevia ubuntu_usn
Product: apache2 (focal)Fixed in: 2.4.41-4ubuntu3.23+esm5
ubuntupatch availablevia ubuntu_usn
Product: apache2 (trusty)Fixed in: 2.4.7-1ubuntu4.22+esm14
ubuntupatch availablevia ubuntu_usn
Product: apache2 (xenial)Fixed in: 2.4.18-2ubuntu3.17+esm19
ubuntupatch availablevia ubuntu_usn
Product: nginx (jammy)Fixed in: 1.18.0-6ubuntu14.13
ubuntupatch availablevia ubuntu_usn
Product: apache2 (bionic)Fixed in: 2.4.29-1ubuntu4.27+esm10
ubuntupatch availablevia ubuntu_usn
Product: nginx (jammy)Fixed in: 1.18.0-6ubuntu14.15
ubuntupatch availablevia ubuntu_usn
Product: nginx (noble)Fixed in: 1.24.0-2ubuntu7.12
ubuntupatch availablevia ubuntu_usn
Product: nginx (questing)Fixed in: 1.28.0-6ubuntu1.7
ubuntupatch availablevia ubuntu_usn
Product: nginx (resolute)Fixed in: 1.28.3-2ubuntu1.5
ubuntupatch availablevia ubuntu_usn
Product: nginx (bionic)Fixed in: 1.14.0-0ubuntu1.11+esm4
ubuntupatch availablevia ubuntu_usn
Product: nginx (focal)Fixed in: 1.18.0-0ubuntu1.7+esm3
ubuntupatch availablevia ubuntu_usn
Product: nginx (trusty)Fixed in: 1.4.6-1ubuntu3.9+esm8
apachevendor investigatingvia vendor_rss
View patch

Vendor Advisories (7)

ubuntuUSN-8571-1

Apache HTTP Server vulnerabilities

Jul 20, 2026
ubuntuUSN-8398-4

nginx vulnerability

Jul 2, 2026
ubuntuUSN-8398-3

nginx vulnerability

Jun 15, 2026
microsoft2026-Jun/CVE-2026-49975Important

Apache HTTP Server: mod_http2 denial of service

Jun 9, 2026
apacheapache:www.mail-archive.com/[email protected]/msg11218.html

CVE-2026-49975: Apache HTTP Server: mod_http2 denial of service

Jun 8, 2026
ubuntuUSN-8398-1

nginx vulnerability

Jun 8, 2026
apachellm-apache-f398f8ed28802aa3LOW

Apache HTTP Server 2.4 vulnerabilities - The Apache HTTP Server Project

Mar 2, 2026

References

access.redhat.com / errata/RHSA-2026:25042
access.redhat.com / errata/RHSA-2026:25057
access.redhat.com / errata/RHSA-2026:25090
access.redhat.com / errata/RHSA-2026:25225
access.redhat.com / errata/RHSA-2026:27114
access.redhat.com / errata/RHSA-2026:27200
access.redhat.com / errata/RHSA-2026:27201
access.redhat.com / errata/RHSA-2026:36373
access.redhat.com / errata/RHSA-2026:36831
access.redhat.com / errata/RHSA-2026:36846
access.redhat.com / security/cve/CVE-2026-49975
bugzilla.redhat.com / show_bug.cgi
security.access.redhat.com / data/csaf/v2/vex/2026/cve-2026-49975.json
github.com / EQSTLab/CVE-2026-49975
ExploitThird Party Advisory
lists.debian.org / debian-lts-announce/2026/06/msg00009.html
Mailing ListThird Party Advisory
openwall.com / lists/oss-security/2026/06/03/3
Mailing ListThird Party Advisory
openwall.com / lists/oss-security/2026/06/08/16
Mailing ListThird Party Advisory
httpd.apache.org / security/vulnerabilities_24.html
Vendor Advisory