CVE-2026-56449 Apache HTTP Server - Out of Bounds Write

Apache HTTP Server 2.4.0 through 2.4.68 contains an out-of-bounds write caused by crafted HTTP response bodies in mod_proxy_html, letting remote attackers corrupt memory, exploit requires crafted HTTP response.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.61% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Out of Bounds Write
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
1 October 2026
Updated
15 October 2026
Weakness
CWE-787

Vendor fix

Update to a version later than 2.4.68 or the latest available version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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