Product

Apache HTTP Server

1 mentions in 7 days · 1 in 30 days · 2 total · first seen Aug 12, 2026 · last 5d ago

Timeline2 articles

USN-8571-2: Apache HTTP Server regression

Ubuntu issues USN-8571-2 fixing an Apache HTTP Server regression that prevented startup when HTTP/2 proxying was enabled.

Ubuntu released USN-8571-2 to fix a regression introduced by USN-8571-1 in Apache HTTP Server. The earlier fix was incomplete due to a missing library symbol, causing Apache to fail to start when HTTP/2 proxying was enabled. The original advisory addressed CVE-2026-33007, a memory-handling flaw in mod_authn_socache allowing remote denial of service, and an HTTP response splitting vulnerability affecting multiple modules, credited to Pavel Kohout, Arkadi Vainbrand, Haruki Oyama, Merih Mengisteab, and Dawit Jeong.

Ubuntu Security Noticesupdated Sep 11, 12:03 UTC · 4d agofirst Sep 10, 19:36 UTC · 5d agoAdvisory 13 sources CVE-2026-33007

HTTP/2 Bomb CVE-2026-49975

Fortinet advisory details CVE-2026-49975, an Apache HTTP Server HTTP/2 flaw enabling denial of service, affecting versions 2.4.17 through 2.4.67.

Fortinet PSIRT advisory FG-IR-26-163, revised 2026-08-19, covers CVE-2026-49975, a memory allocation with excessive size value flaw (HTTP/2 bomb) in Apache HTTP Server's mod_http2, scored CVSSv3 5.8. Malicious HTTP requests can cause a denial of service, and affected versions span Apache HTTP Server 2.4.17 through 2.4.67. The advisory text does not state which Fortinet product bundles the affected Apache component or whether exploitation has been observed.

Fortinet PSIRTAug 12, 07:00 UTC · Aug 12, 2026Advisory CVE-2026-49975

Related CVEsby mentions

CVE-2026-499757.534%
Unauthenticated DoS via excessive memory allocation in Apache HTTP Server (HTTP/2 'bomb')
CVE-2026-49975 is a memory-allocation flaw (CWE-789, 'Memory Allocation with Excessive Size Value', with related data-amplification handling per CWE-409) in Apache HTTP Server's mod_http module; related press coverage characterizes it as an HTTP/2 'bomb'. An unauthenticated remote attacker triggers it by sending malicious HTTP requests that cause the server to allocate memory with an excessively large size, and the practical impact is denial of service — availability loss with no direct confidentiality or integrity impact (CVSS 7.5, AV:N/AC:L/PR:N/UI:N, availability impact high). It affects Apache HTTP Server 2.4.17 through 2.4.67, and the advisory data also lists Debian Linux as affected through its shipped Apache packages (specific Debian releases are not specified). Exploitation has not been confirmed in the wild and the flaw is not in CISA's KEV catalog, but a public proof-of-concept exists (github.com/EQSTLab/CVE-2026-49975) and EPSS assigns a 31% probability of exploitation within 30 days (98th percentile), so near-term exploitation is plausible.
· apache http server 2.4.17 through 2.4.67 (inclusive) · debian linux PoC mass
CVE-2026-330075.3<1%
A NULL pointer dereference in the mod_authn_socache in Apache HTTP Server 2.4.66 and earlier allows an unauthenticated remote user to crash a child process in a
A NULL pointer dereference in the mod_authn_socache in Apache HTTP Server 2.4.66 and earlier allows an unauthenticated remote user to crash a child process in a caching forward proxy configuration. Users are recommended to upgrade to version 2.4.67, which fixes this issue.
· apache http server—

Appears with

organization Apache Software Foundation 2 vendor Apache Software Foundation 2 product mod_authn_socache 1 vendor Canonical 1 vendor Fortinet 1 product Ubuntu 1 organization Fortinet PSIRT 1

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