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Advisory details: gitlab / maven/io.netty/netty-codec-http/CVE-2026-41417
Advisory ID gitlab/maven/io.netty/netty-codec-http/CVE-2026-41417
Aliases CVE-2026-41417
GHSA-v8h7-rr48-vmmv
Summary Netty: Start-Line Injection in DefaultHttpRequest.setUri() Allows HTTP Request Smuggling and RTSP Request Injection Netty allows request-line validation to be bypassed when a `DefaultHttpRequest` or `DefaultFullHttpRequest` is created first and its URI is later changed via `setUri()`. The constructors reject CRLF and whitespace characters that would break the start-line, but `setUri()` does not apply the same validation. `HttpRequestEncoder` and `RtspEncoder` then write the URI into the request line verbatim. If attacker-controlled input reaches `setUri()`, this enables CRLF injection and insertion of additional HTTP or RTSP requests. In practice, this leads to HTTP request smuggling / desynchronization on the HTTP side and request injection on the RTSP side.
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 (4)
CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
CWE-93 Improper Neutralization of CRLF Sequences ('CRLF Injection')
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-http/CVE-2026-41417.yml
Reference id Reference type URL
CVE-2026-41417 https://nvd.nist.gov/vuln/detail/CVE-2026-41417
GHSA-v8h7-rr48-vmmv https://github.com/advisories/GHSA-v8h7-rr48-vmmv
GHSA-v8h7-rr48-vmmv Other https://github.com/netty/netty/security/advisories/GHSA-v8h7-rr48-vmmv
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:L/A:N Found at https://gitlab.com/gitlab-org/advisories-community/-/blob/main/maven/io.netty/netty-codec-http/CVE-2026-41417.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:P/A:Y/T:P/P:M/B:A/M:M/D:T/2026-05-07T13:59:21Z/

Decision: Track

Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/41xxx/CVE-2026-41417.json

Source Advisory: vulnrichment/CVE-2026-41417

View SSVC decision tree 
[{'Exploitation': 'poc'},
 {'Automatable': 'yes'},
 {'Technical Impact': 'partial'},
 {'Mission Prevalence': 'minimal'},
 {'Public Well-being Impact': 'material'},
 {'Mission & Well-being': 'medium'}]