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CVE-2026-49975

Apache HTTP Server vulnerability

7.5 HIGHPublic exploitEPSS 4.17%
  1. Published8 Jun 2026

Description

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Apache HTTP Server≥ 2.4.17 < 2.4.68
Debian Linux11.0

Remediation

Fixed in
Apache HTTP Server≥ 2.4.68

References

and 12 more references

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Frequently asked

Is CVE-2026-49975 being actively exploited?

CVE-2026-49975 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 4.17%.

How severe is CVE-2026-49975?

CVE-2026-49975 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 4.17% probability of exploitation.

Which products are affected by CVE-2026-49975?

Affected products include Apache HTTP Server, Debian Linux.

How do I fix CVE-2026-49975?

Upgrade affected software to a fixed version, for example Apache HTTP Server 2.4.68 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.