high7.5
CVE-2026-54399
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 …
Impact
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 cause a denial of service through memory exhaustion by sending messages with excessive number of headers / excessive header length
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| maven | org.apache.httpcomponents.core5:httpcore5 | < 5.4.3 | 5.4.3 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Apache | Httpcomponents Core | from 5.0 through 5.4.2 Version 5.5 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-hf6x-8p5f-cgmf
- https://nvd.nist.gov/vuln/detail/CVE-2026-54399
- https://lists.apache.org/thread/zmxh1pl2zohov5ntdh4lt85gfrlchgpy
- http://www.openwall.com/lists/oss-security/2026/07/01/4
- https://github.com/apache/httpcomponents-core/commit/d96a00fec9b2e19f8005e35681df5f6cd6e21a9e
- https://github.com/apache/httpcomponents-core/commit/fdc53a32fe0fccf098cc67e71cd125e447c759ed