Detections
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SCA: security update for io.netty:netty-codec-http2 (GHSA-563q-j3cm-6jxm)

medium Tenable Cloud Security Plugin ID 443218

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Netty is a network application framework for development of protocol servers and clients. Prior to
 versions 4.1.135.Final and 4.2.15.Final, Netty HTTP/2 max header size handling produces an attack similar
 to HTTP/2 Rapid Reset. There is a setting in the http2 specification called
 `SETTINGS_MAX_HEADER_LIST_SIZE`. When a client sends that setting to Netty, it appears that Netty will
 behave as follows: read the request; proxy the request to the origin; attempt to produce a response; and
 create an exception while writing the headers for the response. Functionally, this should be similar to
 the http2 reset attack, but with a different on-the-wire signature. Versions 4.1.135.Final and
 4.2.15.Final patch the issue. (CVE-2026-50560)

Solution

Update the io.netty:netty-codec-http2 library and its related packages to version 4.1.135.Final or later.

See Also

https://github.com/advisories/GHSA-563q-j3cm-6jxm

Plugin Details

Severity: Medium

ID: 443218

Version: Revision 1.3

Type: Local

Family: SCA Checks

Published: 6/16/2026

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2026-50560

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: Medium

Base Score: 6.9

Threat Score: 2.7

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 6/15/2026

Vulnerability Publication Date: 6/12/2026

Reference Information

CVE: CVE-2026-50560

cwe: CWE-770