CVE Watch24 jul 2026

CVE-2026-34715

ewe is a Gleam web server. Prior to version 3.0.6, the encode_headers function in src/ewe/internal/encoder.gleam directly interpolates respo

CVSS

5.3

Medio

EPSS

0.3%

p26

KEV

—

Exploit Today

0-100

Publicado: 2 abr 2026 · Última mod.: 24 jul 2026 · CWE-113

EPSS · 30d

0.3%EPSS · 30 días0.3%

2026-08-172026-09-14

Descripción técnica

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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