Vulnerability Details CVE-2026-49975
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.168
EPSS Ranking 96.7%
CVSS Severity
CVSS v3 Score 7.5
References
- https://httpd.apache.org/security/vulnerabilities_24.html
- http://www.openwall.com/lists/oss-security/2026/06/03/3
- http://www.openwall.com/lists/oss-security/2026/06/08/16
- https://lists.debian.org/debian-lts-announce/2026/06/msg00009.html
- 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/security/cve/CVE-2026-49975
- https://bugzilla.redhat.com/show_bug.cgi?id=2485371
- https://github.com/EQSTLab/CVE-2026-49975
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-49975.json
Products affected by CVE-2026-49975
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cpe:2.3:a:apache:http_server:2.4.17
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cpe:2.3:a:apache:http_server:2.4.18
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cpe:2.3:a:apache:http_server:2.4.19
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cpe:2.3:a:apache:http_server:2.4.20
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cpe:2.3:a:apache:http_server:2.4.21
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cpe:2.3:a:apache:http_server:2.4.22
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cpe:2.3:a:apache:http_server:2.4.23
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cpe:2.3:a:apache:http_server:2.4.24
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cpe:2.3:a:apache:http_server:2.4.25
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cpe:2.3:a:apache:http_server:2.4.26
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cpe:2.3:a:apache:http_server:2.4.27
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cpe:2.3:a:apache:http_server:2.4.28
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cpe:2.3:a:apache:http_server:2.4.29
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cpe:2.3:a:apache:http_server:2.4.30
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cpe:2.3:a:apache:http_server:2.4.31
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cpe:2.3:a:apache:http_server:2.4.32
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cpe:2.3:a:apache:http_server:2.4.33
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cpe:2.3:a:apache:http_server:2.4.34
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cpe:2.3:a:apache:http_server:2.4.35
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cpe:2.3:a:apache:http_server:2.4.36
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cpe:2.3:a:apache:http_server:2.4.37
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cpe:2.3:a:apache:http_server:2.4.38
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cpe:2.3:a:apache:http_server:2.4.39
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cpe:2.3:a:apache:http_server:2.4.40
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cpe:2.3:a:apache:http_server:2.4.41
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cpe:2.3:a:apache:http_server:2.4.42
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cpe:2.3:a:apache:http_server:2.4.43
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cpe:2.3:a:apache:http_server:2.4.44
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cpe:2.3:a:apache:http_server:2.4.45
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cpe:2.3:a:apache:http_server:2.4.46
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cpe:2.3:a:apache:http_server:2.4.47
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cpe:2.3:a:apache:http_server:2.4.48
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cpe:2.3:a:apache:http_server:2.4.49
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cpe:2.3:a:apache:http_server:2.4.50
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cpe:2.3:a:apache:http_server:2.4.51
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cpe:2.3:a:apache:http_server:2.4.52
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cpe:2.3:a:apache:http_server:2.4.53
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cpe:2.3:a:apache:http_server:2.4.54
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cpe:2.3:a:apache:http_server:2.4.55
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cpe:2.3:a:apache:http_server:2.4.56
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cpe:2.3:a:apache:http_server:2.4.57
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cpe:2.3:a:apache:http_server:2.4.58
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cpe:2.3:a:apache:http_server:2.4.59
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cpe:2.3:a:apache:http_server:2.4.60
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cpe:2.3:a:apache:http_server:2.4.61
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cpe:2.3:a:apache:http_server:2.4.62
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cpe:2.3:a:apache:http_server:2.4.63
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cpe:2.3:a:apache:http_server:2.4.64
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cpe:2.3:a:apache:http_server:2.4.65
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cpe:2.3:a:apache:http_server:2.4.66
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cpe:2.3:a:apache:http_server:2.4.67
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cpe:2.3:o:debian:debian_linux:11.0