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
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-54399US | — | — | ||
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 an remote attacker to… | ||||
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references
External citations — patches, advisories, analysis.
- http://www.openwall.com/lists/oss-security/2026/07/01/4WEB
- https://github.com/apache/httpcomponents-corePACKAGE
- https://github.com/apache/httpcomponents-core/commit/d96a00fec9b2e19f8005e35681df5f6cd6e21a9eWEB
- https://github.com/apache/httpcomponents-core/commit/fdc53a32fe0fccf098cc67e71cd125e447c759edWEB
- https://lists.apache.org/thread/zmxh1pl2zohov5ntdh4lt85gfrlchgpyWEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-54399ADVISORY
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