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Advisories

go-chi chi 5.2.2 through 5.5.0 Open Redirect via RedirectSlashes Middleware

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Severity
medium
Date
Affecting

  • chi >= 5.2.2, <= 5.5.0

CWE
  • CWE-601 URL Redirection to Untrusted Site ('Open Redirect')
CVSS
5.1
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Credit
Zachariah Mithani (AploSec)
Description
go-chi chi 5.2.2 through 5.5.0 contains an open redirect vulnerability in the RedirectSlashes middleware that allows attackers to redirect victims to external hosts by embedding tab characters in request paths. Attackers can craft links with a URL-encoded tab, which browsers strip from the 301 Location header and resolve as a protocol-relative URL, bypassing the fix for CVE-2025-69725.

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