Overview
CVE-2026-6182 describes a SQL injection vulnerability in a PHP based Simple Content Management System 1.0 via the /web/admin/login.php endpoint. An attacker could craft a request that alters the User value to bypass authentication, access data, or modify records. This remote exploit was publicly available and aligns with CWE-74 and CWE-89 by failing to validate input and by building SQL with untrusted data.
In Go using the Gin web framework, a vulnerability similar to CVE-2026-6182 can appear when developers build SQL queries by concatenating user input directly into strings. If login handlers read username or password from a request and concatenate them into a SQL statement, an attacker can inject arbitrary SQL through these fields and escalate privileges or exfiltrate data. This reflects the patterns of CWE-89 and CWE-74 in a Go context.
Remediation involves using parameterized queries, prepared statements, validation, and defense in depth. In Gin, always treat user input as untrusted, choose a driver that uses placeholders, and pass inputs as separate arguments. Prefer an ORM or a query builder that enforces parameterization, and constrain database privileges to the minimum needed.
Code Fix Example
Go (Gin) API Security Remediation
package main\n\nimport (\n \"context\"\n \"database/sql\"\n \"log\"\n \"net/http\"\n \"time\"\n\n \"github.com/gin-gonic/gin\"\n _ \"github.com/lib/pq\"\n)\n\nvar db *sql.DB\n\nfunc main() {\n var err error\n db, err = sql.Open(\"postgres\", \"user=postgres password=secret host=localhost dbname=mydb sslmode=disable\")\n if err != nil { log.Fatal(err) }\n defer db.Close()\n\n r := gin.Default()\n r.POST(\"/login/vuln\", vulnerableLogin)\n r.POST(\"/login/fix\", fixedLogin)\n r.Run()\n}\n\nfunc vulnerableLogin(c *gin.Context) {\n username := c.PostForm(\"username\")\n password := c.PostForm(\"password\")\n\n // Insecure: concatenating user input into SQL\n query := \"SELECT id FROM users WHERE username = '\" + username + \"' AND password = '\" + password + \"'\"\n\n var id int\n ctx, cancel := context.WithTimeout(c, 2*time.Second)\n defer cancel()\n row := db.QueryRowContext(ctx, query)\n if err := row.Scan(&id); err != nil {\n c.JSON(http.StatusUnauthorized, gin.H{\"error\": \"invalid credentials\"})\n return\n }\n c.JSON(http.StatusOK, gin.H{\"id\": id, \"username\": username})\n}\n\nfunc fixedLogin(c *gin.Context) {\n username := c.PostForm(\"username\")\n password := c.PostForm(\"password\")\n\n // Secure: parameterized query\n // For Postgres use $1, $2 placeholders. For MySQL/SQLite use ? placeholders.\n query := \"SELECT id FROM users WHERE username = $1 AND password = $2\"\n\n var id int\n ctx, cancel := context.WithTimeout(c, 2*time.Second)\n defer cancel()\n row := db.QueryRowContext(ctx, query, username, password)\n if err := row.Scan(&id); err != nil {\n c.JSON(http.StatusUnauthorized, gin.H{\"error\": \"invalid credentials\"})\n return\n }\n c.JSON(http.StatusOK, gin.H{\"id\": id, \"username\": username})\n}\n