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CVE

CVE-2026-54399

Apache HttpComponents Core HTTP/1 header parsing can cause memory-exhaustion denial of service
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CVE

CVE-2026-54399

Apache HttpComponents Core HTTP/1 header parsing can cause memory-exhaustion denial of service

Uncontrolled Resource Consumption vulnerability in the HTTP/1.1 message parser in Apache HttpComponents Core (5.4.2 and earlier, 5.5-beta1 and earlier) allows a remote attacker to cause a denial of service through memory exhaustion by sending messages with excessive number of headers / excessive header length

Package Versions Affected

Package Version
patch Availability
org.apache.httpcomponents:httpcore 4.4.8
Available
Available by request

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
7.5
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
C
H
U
7.5
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Related Resources

No items found.

References

https://nvd.nist.gov/vuln/detail/CVE-2026-54399, https://github.com/apache/httpcomponents-core/commit/d96a00fec9b2e19f8005e35681df5f6cd6e21a9e, https://github.com/apache/httpcomponents-core/commit/fdc53a32fe0fccf098cc67e71cd125e447c759ed, https://github.com/apache/httpcomponents-core, https://lists.apache.org/thread/zmxh1pl2zohov5ntdh4lt85gfrlchgpy, http://www.openwall.com/lists/oss-security/2026/07/01/4

Severity

7.5

CVSS Score
0
10

Basic Information

Base CVSS
7.5
EPSS Probability
0.0087%
EPSS Percentile
0.57532%
Introduced Version
5.5-alpha1,5.0-beta8,5.0-alpha2,5.0-alpha1,4.3-alpha1,4.3.3,4.3-beta2,0
Fix Available
5.5-beta2,5.4.3,2.19.0-r0,3.3.1-r4,3.32.1-r1,3.32.1-r4,37.0.0-r56,9.3.7-r6,9.4.5-r0,9.5.1-r0,13.7.0-r1,3.5.0-r3,5.6.3-r3,2026.1.2-r3,2026.0.5-r1,0.12.0-r39,0.5.5-r2,9.3.8-r2,9.4.5-r1,9.5.2-r3,9.4.5-r3,9.5.2-r4,3.2.3-r8,3.2.3-r5,2.19.6-r7,3.8.0-r3,3.8.0-r1,26.8.0.126808-r1,4.14.7-r4,7.3.0-r3

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