Advisory details:
vulnrichment / CVE-2026-50560
| Advisory ID | vulnrichment/CVE-2026-50560 |
| Aliases | |
| Summary | 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. |
| 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 |
| System | Score | Found at |
|---|---|---|
| cvssv4 | 6.9 | |
| ssvc | Track |
| 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 | ||
| 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 EPSS data available for this advisory.
| Patch URL | |
|---|---|
| There are no known patches. | |
| Attack Vector (AV) | Attack Complexity (AC) | Attack Requirements (AT) | Privileges Required (PR) | User Interaction (UI) | Vulnerable System Impact Confidentiality (VC) | Vulnerable System Impact Integrity (VI) | Vulnerable System Impact Availability (VA) | Subsequent System Impact Confidentiality (SC) | Subsequent System Impact Integrity (SI) | Subsequent System Impact Availability (SA) |
|---|---|---|---|---|---|---|---|---|---|---|
network adjacent local physical |
low high |
none present |
none low high |
none passive active |
high low none |
high low none |
high low none |
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
[{'Exploitation': 'none'},
{'Automatable': 'yes'},
{'Technical Impact': 'partial'},
{'Mission Prevalence': 'minimal'},
{'Public Well-being Impact': 'material'},
{'Mission & Well-being': 'medium'}]