Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
The resteasy-netty4 library (Maven package org.jboss.resteasy:resteasy-netty4-cdi, all versions) mishandles HTTP requests that use smuggling techniques containing an ASCII control character. A remote attacker able to send such requests can put the Netty decoder into a bad-message state, so later legitimate requests on the same connection are ignored and clients time out. The source gives few details on exact conditions. No fix is listed.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 5.3 | Medium | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L | CNA (redhat) |
- CISA KEV Not listed.
- EPSS 0.0065, the 51st percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:17 UTC First seen by agentprime
- 31 Oct 2026, 14:17 UTC Confirmed by OSV