CVE-2026-54399: high-severity vulnerability in Apache HttpComponents Core
Apache HttpComponents Core: Unbounded HTTP Header/Line Length in Default Configuration
Published
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 0.8%
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
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
Apache Software Foundation · Apache HttpComponents CoreRelated CVEs — Apache HttpComponents Core
In the same product, most dangerous first.