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    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.

    Published:Jun 3, 2026
    Last Modified:Aug 19, 2026
    EPS:Jun 8, 2026
    EPSS Score:0.27984
    CVSS Score:7.5

    Affected Products

    Vendor
    Apache
    Product
    Http Server
    Vendor
    Debian
    Product
    Debian Linux

    Exploits

    https://github.com/EQSTLab/CVE-2026-49975https://github.com/0xc03307b/CVE-2026-49975https://github.com/EQSTLab/CVE-2026-49975https://github.com/fevar54/Proof-of-Concept-POC---CVE-2026-49975-HTTP-2-Bomb-https://github.com/LiaoZiqi-GZFLS/CVE-2026-49975https://github.com/LSG-PolarBear/CVE-2026-49975https://github.com/Manisso/http2-bombhttps://github.com/minc-nice-100/http2-bomb-analysis-paperhttps://github.com/mrx-arafat/CVE-2026-49975-POChttps://github.com/obrige/http2-bombhttps://github.com/razureink/cve-2026-49975-http2bomb_reproductionhttps://github.com/renzi25031469/CVE-2026-49975-HTTP-2-Bombhttps://github.com/wlor0623/http2-bomb-detector

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-48913 (CVSS 7.3) — Use After Free vulnerability in Apache HTTP Server module mod_http2 when file handles are already exhausted. …
    CVE-2026-42536 (CVSS 7.5) — Heap-based Buffer Overflow vulnerability in Apache HTTP Server with mod_xml2enc, xml2StartParse, and untrusted…
    CVE-2026-44185 (CVSS 7.3) — Buffer Over-read vulnerability in Apache HTTP Server via outbound OCSP requests to an attacker controlled OCSP…
    CVE-2026-34355 (CVSS 7.5) — A buffer overflow in mod_proxy_html in Apache HTTP Server 2.4.67 and earlier allows an attack by an untrusted …
    CVE-2026-44631 (CVSS 9.8) — Buffer Underwrite vulnerability in Apache HTTP Server on crafted regular expressions in the configuration. Th…
    CVE-2026-44119 (CVSS 5.5) — Improper Privilege Management vulnerability in Apache HTTP Server 2.4.67 and earlier allows local .htaccess au…
    CVE-2026-43951 (CVSS 6.5) — Out-of-bounds Read vulnerability in Apache HTTP Server with mod_headers and mod_mime and multiple response lan…
    CVE-2026-42535 (CVSS 9.1) — A path handling issue in mod_dav_fs in Apache 2.4.67 and earlier allows a WebDAV content author to directly ma…
    CVE-2026-34356 (CVSS 7.5) — Heap-based Buffer Overflow vulnerability in Apache HTTP Server with malicious backend servers and ProxyPassRev…
    CVE-2026-44186 (CVSS 7.3) — Loop with Unreachable Exit Condition ('Infinite Loop') vulnerability in the mod_proxy_ftp module in Apache HTT…

    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/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
    https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-49975.json

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High