https://seclists.org/oss-sec/2026/q2/845: CVE-2026-49975: Apache HTTP Server: mod_http2 denial of service

Published Jun 8, 2026
·
Updated

Affected Software

1 affected component
Apache HTTP Server>=2.4.17<=2.4.67
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Frequently Asked Questions

1

What is the severity of CVE-2026-49975?

CVE-2026-49975 has a moderate severity level.

2

What versions of Apache HTTP Server are affected by CVE-2026-49975?

CVE-2026-49975 affects Apache HTTP Server versions 2.4.17 through 2.4.67.

3

How does CVE-2026-49975 affect Apache HTTP Server?

CVE-2026-49975 leads to a denial of service due to memory allocation issues with excessive size values.

4

How can I mitigate CVE-2026-49975?

Mitigation for CVE-2026-49975 involves upgrading your Apache HTTP Server to a version later than 2.4.67.

5

What is the nature of the vulnerability in CVE-2026-49975?

The vulnerability in CVE-2026-49975 is related to memory allocation with excessive size values within the mod_http2 module.

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