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, leading to HTTP request smuggling or desynchronization on the HTTP side and request injection on the RTSP side. This issue is fixed in versions 4.2.13.Final and 4.1.133.Final.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:2308-1 advisory.

    This update for netty, netty-tcnative fixes the following issues

    - CVE-2026-41417: missing validations leads to HTTP request smuggling and RTSP request injection via     start-line       injection in `DefaultHttpRequest.setUri()` (bsc#1264350).
    - CVE-2026-42578: HTTP Header Injection via HttpProxyHandler Disabled Validation in Netty (bsc#1265243).
    - CVE-2026-42579: DNS codec does not enforce RFC 1035 domain name constraints during either encoding or     decoding       (bsc#1265272).
    - CVE-2026-42580: chunk size parser silently overflows int and enables request smuggling attacks     (bsc#1265273).
    - CVE-2026-42581: TE+CL header coexistence in HTTP/1.0 requests bypasses smuggling sanitization     (bsc#1265277).
    - CVE-2026-42583: resource exhaustion and possible denial of service via `Lz4FrameDecoder` (bsc#1265279).
    - CVE-2026-42584: improper handling of inbound responses in `HttpClientCodec` can lead to response     desynchronization       (bsc#1265280).
    - CVE-2026-42585: Netty is an asynchronous, event-driven network application framework (bsc#1265292).
    - CVE-2026-42586: CRLF Injection in Netty Redis Codec Encoder (bsc#1265245).
    - CVE-2026-42587: HttpContentDecompressor maxAllocation bypass via Content-Encoding: br/zstd/snappy     enables       decompression bomb DoS (bsc#1265246).
    - CVE-2026-44248: Netty is an asynchronous, event-driven network application framework (bsc#1265294).
    - CVE-2026-42582: HTTP/3 QPACK literal unbounded allocation (bsc#1265318).

    Changes for netty:

    - Upgrade to upstream version 4.1.133

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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, leading to HTTP request smuggling or desynchronization on the HTTP side and request     injection on the RTSP side. This issue is fixed in versions 4.2.13.Final and 4.1.133.Final.
    (CVE-2026-41417)

Note that Nessus relies on the presence of the package as reported by the vendor.

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

  - 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, leading to HTTP request smuggling or desynchronization on the HTTP side and request
    injection on the RTSP side. This issue is fixed in versions 4.2.13.Final and 4.1.133.Final.
    (CVE-2026-41417)

ID	Name	Product	Family	Severity
321020	SUSE SLED15 / SLES15 Security Update : netty, netty-tcnative (SUSE-SU-2026:2308-1)	Nessus	SuSE Local Security Checks	medium
313062	Linux Distros Unpatched Vulnerability : CVE-2026-41417	Nessus	Misc.	medium
441253	SCA: security update for io.netty:netty-codec-http (GHSA-v8h7-rr48-vmmv)	Tenable Cloud Security	SCA Checks	medium
441253	SCA: security update for io.netty:netty-codec-http (GHSA-v8h7-rr48-vmmv)	Tenable Self-Hosted Container Security	SCA Checks	medium

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