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Vulnerability record · CVE-2026-49975 · published 8 June 2026

CVE-2026-49975: Apache http server vulnerability

Apache · Http Server

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.

7.5 CVSS 3.1 High EPSS 4.2% · top 9.5% CWE-789 · CWE-789CWE-409 · CWE-409
7.5CVSS 3.1 base score
4.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
22References, 1 tagged exploit
19 Aug 2026Last modified by NVD

Description

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.

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://httpd.apache.org/security/vulnerabilities_24.html Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/06/03/3 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2026/06/08/16 Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2026/06/msg00009.html Mailing ListThird Party Advisory
https://access.redhat.com/errata/RHSA-2026:25042
https://access.redhat.com/errata/RHSA-2026:25057
https://access.redhat.com/errata/RHSA-2026:25090
https://access.redhat.com/errata/RHSA-2026:25225
https://access.redhat.com/errata/RHSA-2026:27114
https://access.redhat.com/errata/RHSA-2026:27200
https://access.redhat.com/errata/RHSA-2026:27201
https://access.redhat.com/errata/RHSA-2026:36373
https://access.redhat.com/errata/RHSA-2026:36831
https://access.redhat.com/errata/RHSA-2026:36846
https://access.redhat.com/errata/RHSA-2026:50538
https://access.redhat.com/errata/RHSA-2026:50572
https://access.redhat.com/errata/RHSA-2026:55930
https://access.redhat.com/errata/RHSA-2026:55992
https://access.redhat.com/security/cve/CVE-2026-49975
https://bugzilla.redhat.com/show_bug.cgi?id=2485371
https://github.com/EQSTLab/CVE-2026-49975 ExploitThird Party Advisory
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-49975.json

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Source: NIST National Vulnerability Database (record CVE-2026-49975), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.