CVE Watch24 jul 2026

CVE-2026-34830

Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Sendfile#map_accel_path interpolates the val

CVSS

5.9

Medio

EPSS

0.2%

p11

KEV

—

Exploit Today

0-100

Publicado: 2 abr 2026 · Última mod.: 24 jul 2026 · CWE-625

EPSS · 30d

0.2%EPSS · 30 días0.2%

2026-06-302026-07-28

Descripción técnica

Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Sendfile#map_accel_path interpolates the value of the X-Accel-Mapping request header directly into a regular expression when rewriting file paths for X-Accel-Redirect. Because the header value is not escaped, an attacker who can supply X-Accel-Mapping to the backend can inject regex metacharacters and control the generated X-Accel-Redirect response header. In deployments using Rack::Sendfile with x-accel-redirect, this can allow an attacker to cause nginx to serve unintended files from configured internal locations. This issue has been patched in versions 2.2.23, 3.1.21, and 3.2.6.

Referencias oficiales

github.comhttps://github.com/rack/rack/security/advisories/GHSA-qv7j-4883-hwh7

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