CVE-2026-44891Netty is a network application framework for development of protocol servers and clients.
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Netty is a network application framework for development of protocol servers and clients. Prior to 4.1.136.Final and 4.2.16.Final, io.netty.handler.codec.stomp.StompSubframeDecoder fails to limit the total number of headers or their cumulative size per frame, and the maxLineLength parameter only restricts individual header lines. An attacker can send a large number of short headers that are accumulated in memory inside DefaultStompHeadersSubframe until the JVM throws an OutOfMemoryError, causing denial of service for servers exposing a STOMP endpoint based on StompSubframeDecoder. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final.
- CVSS
- 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-400, CWE-770
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jul 23, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
netty netty netty:netty | before 4.1.136; from 4.2.0 before 4.2.16 | NVD |
References
- https://github.com/netty/netty/commit/5b68c61f37aa4a3045cba624cbea239655c9003bpatch
- https://github.com/netty/netty/commit/bb2ff68a1fb71cb4b0eb9a9e17b66c52aff680c6patch
- https://github.com/netty/netty/pull/17063issue-tracking, patch
- https://github.com/netty/netty/pull/17065issue-tracking, patch
- https://github.com/netty/netty/releases/tag/netty-4.1.136.Finalrelease-notes
- https://github.com/netty/netty/releases/tag/netty-4.2.16.Finalrelease-notes
- https://github.com/netty/netty/security/advisories/GHSA-vhch-2wf3-m8rpexploit, vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.