Overview
CVE-2026-35450 describes a vulnerability in WWBN AVideo where the plugin/api/check.ffmpeg.json.php endpoint probes the FFmpeg remote server configuration and returns connectivity status without authentication. In effect, this is a broken authentication issue where unauthenticated users can discover configuration state that may assist further attacks. Although the CVE targets a PHP project, the root issue-exposed access to management or config data-maps directly to CWE-306 (Missing Authentication for critical endpoints).
In practice, attackers can call the public endpoint to learn whether FFmpeg is reachable or configured, enabling reconnaissance and potential exploitation. On a Go/Gin service, similar misconfigurations occur when endpoints that perform admin actions are publicly accessible or protected only by weak checks. An attacker could leverage such endpoints to disrupt service, enumerate active tasks, or alter configurations.
To remediate in Go (Gin), enforce strong authentication and authorization for all sensitive endpoints. Do not rely on client-supplied hints; use tokens, sessions, or OAuth2, and verify roles (e.g., admin) server-side. Apply middleware to protect admin routes, separate public from protected paths, and avoid exposing admin-like actions on publicly accessible endpoints. Use TLS, rotate credentials, and add logging and anomaly detection.
Implementation guidance: provide a code example that shows the vulnerable pattern and the fix side by side, then explain steps to upgrade existing code to a hardened pattern and how to test it.
Code Fix Example
Go (Gin) API Security Remediation
package main
import (
"net/http"
"os"
"github.com/gin-gonic/gin"
)
const adminToken = "secret-admin-token"
func main() {
gin.SetMode(gin.ReleaseMode)
r := gin.New()
r.Use(gin.Logger(), gin.Recovery())
mode := os.Getenv("MODE")
if mode == "fix" {
setupFixedRoutes(r)
} else {
setupVulnerableRoutes(r)
}
r.Run(":8080")
}
func setupVulnerableRoutes(r *gin.Engine) {
// Public endpoint: exposes FFmpeg connectivity status without auth
r.GET("/ffmpeg/check", func(c *gin.Context) {
resp, err := http.Get("http://remote-ffmpeg.example/check")
if err != nil {
c.JSON(http.StatusServiceUnavailable, gin.H{"error": "ffmpeg check failed"})
return
}
defer resp.Body.Close()
c.JSON(http.StatusOK, gin.H{"ffmpeg_status": "reachable"})
})
// Admin/action endpoints without auth (vulnerable)
r.POST("/ffmpeg/kill", func(c *gin.Context) {
c.JSON(http.StatusOK, gin.H{"status": "ffmpeg_killed"})
})
r.GET("/ffmpeg/list", func(c *gin.Context) {
c.JSON(http.StatusOK, gin.H{"ffmpeg": []string{"ffmpeg1","ffmpeg2"}})
})
}
func setupFixedRoutes(r *gin.Engine) {
// Protected admin token-based middleware
authorized := r.Group("/ffmpeg", AuthMiddleware)
authorized.POST("/kill", func(c *gin.Context) {
c.JSON(http.StatusOK, gin.H{"status": "ffmpeg_killed_secure"})
})
authorized.GET("/list", func(c *gin.Context) {
c.JSON(http.StatusOK, gin.H{"ffmpeg": []string{"ffmpeg1","ffmpeg2"}})
})
}
func AuthMiddleware(c *gin.Context) {
auth := c.GetHeader("Authorization")
if len(auth) < 7 || auth[:7] != "Bearer " {
c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "missing token"})
return
}
token := auth[7:]
if token != adminToken {
c.AbortWithStatusJSON(http.StatusForbidden, gin.H{"error": "forbidden"})
return
}
c.Next()
}