CVE-2026-34715 in ewe

Resumen (Inglés)

ewe is a Gleam web server. Prior to version 3.0.6, the encode_headers function in src/ewe/internal/encoder.gleam directly interpolates response header keys and values into raw HTTP bytes without validating or stripping CRLF (\r\n) sequences. An application that passes user-controlled data into response headers (e.g., setting a Location redirect header from a request parameter) allows an attacker to inject arbitrary HTTP response content, leading to response splitting, cache poisoning, and possible cross-site scripting. Notably, ewe does validate CRLF in incoming request headers via validate_field_value() in the HTTP/1.1 parser — but provides no equivalent protection for outgoing response headers in the encoder. This issue has been patched in version 3.0.6.

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Responsable

GitHub_M

Reservar

2026-03-30

Divulgación

2026-04-02

Estado

Confirmado

Voces

VulDB provides additional information and datapoints for this CVE:

ID	Vulnerabilidad	CWE	Exp	Con	CVE
354989	vshakitskiy ewe Setting encoder.gleam validate_field_value escalada de privilegios	113	No está definido	Arreglo oficial	CVE-2026-34715

Fuentes

• MITRE
• NVD
• CVE Details