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Vulnerability · Published Nov 4, 2026 · Assigned by VulnCheck

CVE-2026-122132go-chi chi 5.2.2 through 5.5.0 Open Redirect via RedirectSlashes Middleware

Medium 6.1

In plain English

A medium-severity open redirect in chi from go-chi. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 19% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.1Medium
Exploit odds (30 days)0.3%top 80.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:14golang-github-go-chi-chino fix listedDEBIAN-CVE-2026-122132
Gogithub.com/go-chi/chino fix listedGO-2026-4316
Gogithub.com/go-chi/chi/v2no fix listedGO-2026-4316
Gogithub.com/go-chi/chi/v3no fix listedGO-2026-4316
Gogithub.com/go-chi/chi/v4no fix listedGO-2026-4316
Gogithub.com/go-chi/chi/v55.2.4GHSA-mqqf-5wvp-8fh8
Gogithub.com/go-chi/chi/v55.2.4GO-2026-4316
Ubuntu:22.04:LTSgolang-github-go-chi-chino fix listedUBUNTU-CVE-2026-122132
Ubuntu:24.04:LTSgolang-github-go-chi-chino fix listedUBUNTU-CVE-2026-122132
Ubuntu:26.04:LTSgolang-github-go-chi-chino fix listedUBUNTU-CVE-2026-122132
Ubuntu:26.10golang-github-go-chi-chino fix listedUBUNTU-CVE-2026-122132

Affected products (as reported)

VendorProductVersions
go-chi chi 5.2.2 – through 5.5.0

Weakness: CWE-601 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References