Signal is active with 1 mentions in latest observed window
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NVD description
Netty is a network application framework for development of protocol servers and clients. Prior to 4.1.136.Final and 4.2.16.Final, Netty's SPDY SETTINGS decoder accepts a peer-declared SETTINGS entry count up to the 24-bit frame-length limit and materializes every unique setting ID in `DefaultSpdySettingsFrame`, allowing a remote SPDY/3.1 peer to send a syntactically valid roughly 2 MiB SETTINGS frame that creates 262144 map entries and amplifies network input into heap growth and ordered-map insertion work. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final.
Priority
LOW
Exploitation
NONE
PoC
YES
Patch
AVAILABLE
Momentum
STABLE
If you run products in this scope, you should treat this CVE as relevant to your environment.
| Date | Total | Labels |
|---|
| 2026-07-21 | 1 | Disclosure1 |
| 2026-07-31 | 1 | Patch1 |
🚨 HIGH SEVERITY: CVE-2026-55831 (CVSS 7.5) Netty framework vulnerable to resource exhaustion via SPDY SETTINGS frame. Remote attackers can cause DoS by sending 2MB frame creating 262K map entries. Affected: <4.1.136[.]Final, <4.2.16[.]Final Patch NOW! #CVE #PatchNow https://t.co/TytrkL7fkY
Post summary
The tweet announces a high‑severity Netty DoS vulnerability (CVE‑2026‑55831) and urges immediate patching of affected versions.
CVE-2026-55831 Denial of Service via SPDY SETTINGS Frame in Netty Before http://4.1.136.Final https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-55831
Post summary
The post discloses a new denial‑of‑service flaw in Netty, exploiting SPDY SETTINGS frames in versions prior to 4.1.136.Final.
1 of 1 entries
| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| App | netty | netty | - | - | - |