GHSA-vhch-2wf3-m8rp · Severity: high · Ecosystem: maven — Netty: Denial of Service via Unbounded Headers in StompSubframeDecoder
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.
Conclusion & alert: CVE-2026-44891 is rated High Exploit Risk (62/100): CVSS High severity, with low exploitation likelihood (EPSS 0.69%). Core evidence: 1 public exploit reference(s) are indexed (Exploit-DB). Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-07-18 | — | 0.69% | — |
Full EPSS history (1 record total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.5 | 3.1 | HIGH |
|
3.9 | 3.6 | [email protected] |
GHSA-vhch-2wf3-m8rp · Severity: high · Ecosystem: maven — Netty: Denial of Service via Unbounded Headers in StompSubframeDecoder
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2026-44891 not yet assigned priority: Debian including 1 source packages (netty), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): open 5. | https://security-tracker.debian.org/tracker/CVE-2026-44891 |
suse
|
high | CVE-2026-44891 severity important: SUSE including 2 source package names (netty-tcnative, netty3), 24 product×package rows across 12 product lines (SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS, SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS, … (12 product lines)): Known Not Affected 24. | https://www.suse.com/security/cve/CVE-2026-44891/ |
ubuntu
|
medium | CVE-2026-44891 medium priority: Ubuntu including 1 source packages (netty), 7 status rows across 7 suites (bionic, focal, jammy, noble, resolute, trusty, upstream): needs-triage 7. | https://ubuntu.com/security/CVE-2026-44891 |
| URL | Tags |
|---|---|
| https://github.com/netty/netty/commit/5b68c61f37aa4a3045cba624cbea239655c9003b | Patch |
| https://github.com/netty/netty/commit/bb2ff68a1fb71cb4b0eb9a9e17b66c52aff680c6 | Patch |
| https://github.com/netty/netty/pull/17063 | Issue Tracking Patch |
| https://github.com/netty/netty/pull/17065 | Issue Tracking Patch |
| https://github.com/netty/netty/releases/tag/netty-4.1.136.Final | Release Notes |
| https://github.com/netty/netty/releases/tag/netty-4.2.16.Final | Release Notes |
| https://github.com/netty/netty/security/advisories/GHSA-vhch-2wf3-m8rp | Exploit Vendor Advisory |