CVE-2026-14180
Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
11/08/2026
Last modified:
14/08/2026
Description
A flaw was found in the ChunkReader component of the Undertow HTTP server, which is used by WildFly and JBoss EAP to handle chunked transfer encoding. The issue occurs because the parser uses a single internal variable to store both the remaining chunk size and state flags. By sending a specially crafted request with an extremely large chunk size, an attacker can cause these values to overlap, tricking the parser into thinking a request has finished prematurely. This can allow a second, "smuggled" request to be processed out of sync, potentially bypassing security controls.
Impact
Base Score 3.x
5.30
Severity 3.x
MEDIUM