Open Redirect in Go-Chi Chi
CVE-2026-122132
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.
Vulnerability class: Open Redirect
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/go-chi/chi (product)
- github.com/go-chi/chi/blob/v5.5.0/middleware/strip.go (technical-description)
- Pull Request #1238 (issue-tracking, patch)
- GitHub Security Advisory (GHSA-mqqf-5wvp-8fh8) (related, vendor-advisory)
- VulnCheck Advisory: go-chi chi 5.2.2 through 5.5.0 Open Redirect via RedirectSlashes Middleware (third-party-advisory)
Frequently asked questions
- What is CVE-2026-122132?
- CVE-2026-122132 is a medium-severity vulnerability in Go-Chi Chi, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2026-11-04.
- How severe is CVE-2026-122132?
- Medium severity. CVSS v3 base score is 6.1 out of 10.