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Critical, CVSS 9.3

Gin mishandles a wildcard at the end of an origin string

CVE-2019-25211GHSA-869c-j7wc-8jqv

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (github.com/gin-gonic/gin 1.6.0; github.com/gin-contrib/cors 1.6.0), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS 4.0
9.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N · score source
EPSS
  • CVE-2019-25211: 0.43% estimated exploitation activity in the next 30 days; percentile 37.45 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

parseWildcardRules in Gin-Gonic CORS middleware before 1.6.0 mishandles a wildcard at the end of an origin string, e.g., https://example.community/ is allowed when the intention is that only https://example.com/ should be allowed, and http://localhost.example.com/ is allowed when the intention is that only http://localhost/ should be allowed.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 1 · created ·

    Published from ghsa record GHSA-869c-j7wc-8jqv

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2019-25211

Advisory: Gin mishandles a wildcard at the end of an origin string
IDs: CVE-2019-25211, GHSA-869c-j7wc-8jqv
Record: https://patchnext.com/advisories/cve-2019-25211 (revision 1, source checked 26 Oct 2026, 15:13 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 9.3)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: github.com/gin-gonic/gin 1.6.0; github.com/gin-contrib/cors 1.6.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go github.com/gin-gonic/gin: affected < 1.6.0; fixed in 1.6.0
- Go github.com/gin-contrib/cors: affected < 1.6.0; fixed in 1.6.0

## Suggested inspection (read-only)
- Go github.com/gin-gonic/gin: check the installed version with your package manager.
- Go github.com/gin-contrib/cors: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on github.com/gin-gonic/gin, github.com/gin-contrib/cors.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-869c-j7wc-8jqv (GitHub-reviewed advisory GHSA-869c-j7wc-8jqv lists affected ranges: Go github.com/gin-gonic/gin >=0 =0 <1.6.0)

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