Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC PR UI S C I A CVSS EPSS %ile KEV N L N N U N H N 7.5 .0064 47.9 —
AFFECTED Product Versions Fixed netty < 4.1.132.Final – —
TIMELINE Mar 24 Reserved by GitHub_M Mar 27 Published (CNA: GitHub_M) Aug 4 EXPLOIT PUBLISHED — CVE-2026-33870 (netty). Public exploit reference added.
Netty is an asynchronous, event-driven network application framework. In versions prior to 4.1.132.Final and 4.2.10.Final, Netty incorrectly parses quoted strings in HTTP/1.1 chunked transfer encoding extension values, enabling request smuggling attacks. Versions 4.1.132.Final and 4.2.10.Final fix the issue.
| Date | Event | Detail |
|---|---|---|
| March 24, 2026 | Reserved | Reserved by GitHub_M |
| March 27, 2026 | Published | Published (CNA: GitHub_M) |
| August 4, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-33870 (netty). Public exploit reference added. |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| netty | netty | — | < 4.1.132.Final | — |
Authoritative record: CVE-2026-33870 at cve.org
Vendors: netty
Weaknesses: CWE-444
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-33870 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.