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CVE-2026-118681medium6.3

go-chi chi before 5.5.0 Authentication Bypass via SupressNotFound Middleware

Impact

go-chi chi versions before 5.5.0 have an authentication bypass via the SupressNotFound middleware, allowing unauthenticated attackers to access tenant-scoped data. The vulnerability occurs when a mounted path's suffix matches an outer public route. Attackers need access to the mounted path to exploit the weakness.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

go-chi · VulnCheck

chi

2 ranges
VulnCheck version evidence

Package identity

pkg:golang/github.com/go-chi/chi/v5Explore github.com/go-chi/chi/v5 →

Identity supplied by VulnCheck. Version matching requires compatible range evidence.

Compare with this publisher’s ranges. This does not inspect your installation.

affected

0 → before 5.5.0

semver versions

unaffected

5.5.0

semver versions

unknown

Other versions: unaffected

Original source description

go-chi chi before 5.5.0 contains an authentication bypass in middleware.SupressNotFound, which calls Match with the live routing context and leaves a mounted router's parameter and child suffix in place for dispatch against the outer router. Unauthenticated attackers can request a mounted path whose suffix matches an outer public route, skipping the mounted authentication middleware and retrieving tenant-scoped data when that outer handler trusts the retained mount parameter.

Inside the record

Evidence available

Package identity
Version evidence
Remediation guidance · not supplied
Weakness classification
Additional publishers · not supplied

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-118681

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-288 ↗

Authentication Bypass Using an Alternate Path or Channel

VulnCheck

Related →
Contributing organizations · 1
VulnCheck

Assigning organization

2026-10-28

What changed

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References

2 sources
github.com/go-chi/chi/security/advisories/GHSA-rqrp-8cg2-5958
vendor-advisoryVulnCheck
www.vulncheck.com/advisories/go-chi-chi-before-5.5.0-authentication-bypass-via-supressnotfound-middleware
third-party-advisoryVulnCheck