CVE-2026-49975
Apache HTTP Server: mod_http2 denial of service
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-789 |
| Vendor | apache software foundation |
| Product | apache http server |
| Published | Jun 8, 2026 |
| Last Updated | Jul 15, 2026 |
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Affected Versions
Apache Software Foundation / Apache HTTP Server
2.4.17 ≤ 2.4.67
References
httpd.apache.org: https://httpd.apache.org/security/vulnerabilities_24.html openwall.com: http://www.openwall.com/lists/oss-security/2026/06/03/3 lists.debian.org: https://lists.debian.org/debian-lts-announce/2026/06/msg00009.html openwall.com: http://www.openwall.com/lists/oss-security/2026/06/08/16 github.com: https://github.com/EQSTLab/CVE-2026-49975 access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-49975 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2485371 security.access.redhat.com: https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-49975.json access.redhat.com: https://access.redhat.com/errata/RHSA-2026:27200 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:25225 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:25090 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:36846 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:36831 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:36373 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:25057 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:25042 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:27201 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:27114
Credits
Quang Luong of Calif.IO in collaboration with OpenAI Codex