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CVE-2026-49975

Apache HTTP Server: mod_http2 denial of service PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
Apache Software Foundation / Apache HTTP Serveraffected 2.4.17 through 2.4.67

CWE

CWE-789

References

ADP enrichment

CVE

No English description supplied.

CISA-ADP

No English description supplied.

redhat-SADP

A flaw was found in HTTP/2, affecting various web servers. A remote attacker can exploit this vulnerability by combining an HPACK compression bomb with a zero-byte flow-control window. This technique allows a small amount of data to expand into large memory allocations on the server, which are then held, leading to a denial of service (DoS) by rendering the server inaccessible.