Staging Environment: Content and features may be unstable or change without notice.
Advisory details: gitlab / maven/io.netty/netty-codec-http2/CVE-2026-50560
Advisory ID gitlab/maven/io.netty/netty-codec-http2/CVE-2026-50560
Aliases CVE-2026-50560
GHSA-563q-j3cm-6jxm
Summary Netty susceptible to HTTP/2 Reset Attack with different on-the-wire signature Netty HTTP/2 max header size handling produces attack similar to HTTP/2 Rapid Reset.
Status Published
Exploitability 0.5
Weighted Severity 0.0
Risk
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (3)
CWE-770 Allocation of Resources Without Limits or Throttling
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3.1 https://gitlab.com/gitlab-org/advisories-community/-/blob/main/maven/io.netty/netty-codec-http2/CVE-2026-50560.yml
Reference id Reference type URL
https://github.com/netty/netty/releases/tag/netty-4.1.135.Final
https://github.com/netty/netty/releases/tag/netty-4.2.15.Final
CVE-2026-50560 https://nvd.nist.gov/vuln/detail/CVE-2026-50560
GHSA-563q-j3cm-6jxm https://github.com/advisories/GHSA-563q-j3cm-6jxm
GHSA-563q-j3cm-6jxm Other https://github.com/netty/netty/security/advisories/GHSA-563q-j3cm-6jxm
rfc9113.html#name-defined-settings Other https://www.rfc-editor.org/rfc/rfc9113.html#name-defined-settings
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Found at https://gitlab.com/gitlab-org/advisories-community/-/blob/main/maven/io.netty/netty-codec-http2/CVE-2026-50560.yml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none

Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-06-13T03:21:03Z/

Decision: Track

Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/50xxx/CVE-2026-50560.json

Source Advisory: vulnrichment/CVE-2026-50560

View SSVC decision tree 
[{'Exploitation': 'none'},
 {'Automatable': 'yes'},
 {'Technical Impact': 'partial'},
 {'Mission Prevalence': 'minimal'},
 {'Public Well-being Impact': 'material'},
 {'Mission & Well-being': 'medium'}]