Io.netty/netty-codec-http2: netty: http/2 hpackencoder dos with large table size

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Affected scope and exposure questions

Affected software not mapped in the current feed; confirm the named product and version against your inventory.

Recommended response

1. 1Confirm exposure. Identify whether the named product or interface exists in your inventory, then review the linked upstream references for affected versions and vendor guidance.

Evidence timeline and material changes

1. Published upstream

   Sep 18, 2026

   Evidence: source:cvelist:source_dates:source-dates:record

2. Source modified

   Sep 18, 2026

   Evidence: source:cvelist:source_dates:source-dates:record

3. First seen by HOL

   Sep 18, 2026

Sources and claim methodology

• Source referenceaccess.redhat.com
• Source referencebugzilla.redhat.com

Related CVEs

• Io.netty/netty-codec-http: netty: unbounded per-connection queue growth in websocketserverextensionhandler leads to denial of serviceAlso CWE-1035
• Io.netty/netty-codec-stomp: netty: stomp codec content-length long-to-int truncation causes infinite decode loop dosAlso CWE-1035
• Io.netty/netty-codec-haproxy: netty: haproxy proxy-v2 nested-tlv grandchild bytebuf reference-count leak (incomplete fix of pr #16881)Also CWE-1035
• Io.netty/netty-codec-http: netty rtspdecoder method-token smuggling via trailing control byteAlso CWE-1035
• Io.netty/netty-codec-http: netty: http request smuggling due to control characters in the chunk-size lineAlso CWE-1035