CVEFinder.io

CVE-2026-59902

⚠️ high
Summary

Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Final and 4.2.17.Final, io.netty.handler.codec.sctp.SctpMessageCompletionHandler limits incomplete messages and fragment counts but not maxBufferedBytes, allowing unauthenticated peers to exhaust memory with large SCTP fragments. This issue is fixed in versions 4.1.137.Final and 4.2.17.Final.

CVSS Score
7.5
High
EPSS Score
0.7
Exploit Probability
Published Date
2026-08-17
First Seen: 2026-08-18
📊 Relative Risk Intelligence

This CVE is Moderate Risk - more severe than 67.8% of all 365,890 vulnerabilities in our database.

#117,965
Above average severity
Severity Percentile
🎯 CISA SSVC Assessment Updated: Aug 18, 2026
🔍 Exploitation Status
None
No known exploits
⚙️ Automatable
YES
Can be exploited automatically
💥 Technical Impact
Partial
Limited system impact
SSVC data provided by CISA
Last Modified 2026-09-23
Source NVD 🔗
CVSS Vector 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE IDs (Weakness Types)
CWE-400

📦 Affected Products 2

Vendor Product Status Affected Versions
netty netty Affected
< 4.1.137
netty netty Affected
> 4.2.0 < 4.2.17

🔗 References 6

https://github.com/netty/netty/commit/1b5abc6443b637...
Patch
https://github.com/netty/netty/pull/17213
Issue Tracking Patch
https://github.com/netty/netty/pull/17217
Issue Tracking Patch
https://github.com/netty/netty/releases/tag/netty-4....
Release Notes
https://github.com/netty/netty/releases/tag/netty-4....
Release Notes
https://github.com/netty/netty/security/advisories/G...
Vendor Advisory

🔗 Related CVEs 6

CVE ID Severity CVSS EPSS Summary Published
CVE-2026-89044 🔶 medium 6.5 0.4 Netty versions 4.1.133.Final through 4.1.137.Final and 4.2.13.Final through 4.2.17.Final fail to properly validate the f... 2026-09-10
CVE-2026-62380 ⚠️ high 7.5 0.3 Netty (io.netty:netty-codec-socks) versions 4.2.0.Final through 4.2.16.Final and 4.1.x through 4.1.136.Final contain nul... 2026-08-22
CVE-2026-75595 ⛔ critical 9.1 0.5 Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Fina and 4.2.17.Final, io.netty.h... 2026-08-19
CVE-2026-75596 ⚠️ high 7.5 0.7 Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Final and 4.2.17.Final, the defau... 2026-08-19
CVE-2026-59903 🔶 medium 6.5 0.3 Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Final and 4.2.17.Final, io.netty.... 2026-08-17
CVE-2026-73507 ⚠️ high 7.5 0.8 Netty is an asynchronous, event-driven network application framework. Prior to 4.1.136.Final and 4.2.16.Final, io.netty.... 2026-08-13
These CVEs affect the same products