Listen to this Post
How the CVE Works
Bun’s `$` shell API improperly sanitizes user input, allowing command-line arguments or shell metacharacters to be injected. Attackers can craft malicious input that escapes intended execution contexts, leading to arbitrary command execution. The vulnerability stems from insufficient input validation when processing shell commands, enabling attackers to chain unintended system commands.
DailyCVE Form
Platform: Bun
Version: All
Vulnerability: OS Command Injection
Severity: High
Date: Jul 23, 2025
Prediction: Patch by Aug 10, 2025
What Undercode Say
$ bun shell "user_input" Vulnerable command $ bun patch --update Expected fix command
How Exploit
curl -X POST http://target/bun-api --data "cmd=malicious;ls"
Protection from this CVE
- Disable `$` shell API
- Input sanitization
- Update on patch release
Impact
- Remote code execution
- System compromise
- Data exfiltration
Sources:
Reported By: github.com
Extra Source Hub:
Undercode
