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Findings

CVE-2026-41417

Netty allows request-line validation to be bypassed when a or is created first and its URI is later changed via .

Published May 6, 2026 · updated Jun 17, 2026 · netty netty

Netty allows request-line validation to be bypassed when a or is created first and its URI is later changed via . The constructors reject CRLF and whitespace characters that would break the start-line, but does not apply the same validation. and then write the URI into the request line verbatim. If attacker-controlled input reaches , 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.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. May 6, 2026 · NIST NVD

    Detected

    Netty allows request-line validation to be bypassed when a or is created first and its URI is later changed via . The constructors reject CRLF and whitespace characters that would break the start-line, but does not apply the same validation. and then write the URI into the request line verbatim. If attacker-controlled input reaches , this enables CRLF injection and insertion of additional HTTP or

  2. Jun 17, 2026 · NIST NVD

    Updated

    Netty allows request-line validation to be bypassed when a or is created first and its URI is later changed via . The constructors reject CRLF and whitespace characters that would break the start-line, but does not apply the same validation. and then write the URI into the request line verbatim. If attacker-controlled input reaches , this enables CRLF injection and insertion of additional HTTP or

Affected

  • cpe netty/nettyversion unspecified

Sources

  • CVE.orgVulnerability recordCVE-2026-41417

    Official CVE identifier

    cve.org
  • NIST NVDVulnerability recordCVE-2026-41417

    Netty allows request-line validation to be bypassed when a or is created first and its URI is later changed via . The constructors reject CRLF and whitespace characters that would break the start-line, but does no

    nvd.nist.gov

References