# CVE-2026-49975: Apache HTTP Server denial of service in mod_http

Source: https://junglewise.ai/threats/cve-2026-49975-apache-http-server-denial-of-service-in-mod-http  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-08. Updated: 2026-06-08  
License: CC BY 4.0 with a link back

CVE-2026-49975 · Severity: info · CVSS 0 · Published 2026-06-08

Apache HTTP Server is a widely used web server for hosting websites and applications. A vulnerability in its core HTTP processing module allows an attacker to send specially crafted requests that force the server to attempt an excessively large memory allocation. This can lead to a denial-of-service condition, potentially crashing the server or making it unresponsive to legitimate users.

Technologies: [Apache HTTP Server](https://junglewise.ai/threats/technologies/http-server). Vendors: [Apache](https://junglewise.ai/threats/vendors/apache).

## Quick answers

**Is CVE-2026-49975 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-49975 being exploited in the wild.

**How severe is CVE-2026-49975?** Informational severity, with a CVSS score of 0, published 8 June 2026.

**Which products and versions are affected?** Apache HTTP Server 2.4.17 through 2.4.67.

**Is there a fix for CVE-2026-49975?** A patch was published on 2026-06-08: Fixed in Apache HTTP Server version 2.4.68 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-49975 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-49975?** Check whether you run Apache HTTP Server at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A vulnerability classified as CWE-789 (Memory Allocation with Excessive Size Value) exists in the mod_http module of Apache HTTP Server. The flaw occurs when the server processes malicious HTTP requests that specify an excessive size for memory allocation, leading to resource exhaustion or a crash. This is a remote, unauthenticated attack vector. The issue affects versions 2.4.17 through 2.4.67 and is addressed in version 2.4.68.

## Affected products

- Apache HTTP Server 2.4.17 through 2.4.67

## Timeline

- 2026-06-08: advisory: Initial advisory published by Apache and NVD
- 2026-06-08: patched: Fixed in Apache HTTP Server version 2.4.68

## References

- [https://httpd.apache.org/security/vulnerabilities_24.html](https://httpd.apache.org/security/vulnerabilities_24.html)

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