On April 15 2026, a new vulnerability (CVE-2026-40499) was discovered in radare2 < 6.1.4 that allows attackers to inject arbitrary commands via malicious PDB files. https://cvefeed.io/vuln/detail/CVE-2026-40499
What We Know
The vulnerability lies in the print_gvars() function of the PDB parser. Attackers can embed a newline byte in the PE section header name field, creating a malicious PDB file with specially crafted section names that inject r2 commands when the idp command processes the file. The severity is 8.4 — high.
Business Impact
If your organization uses radare2 for binary analysis or reverse engineering—whether as part of internal security tooling, malware analysis, or automated code inspection—this flaw could allow an attacker to execute arbitrary commands on your systems. In a small business that runs radare2 locally, a malicious file could trigger unintended processes, potentially corrupting data or disabling critical services. Enterprise CISOs who rely on radare2 for threat intelligence might see remote execution of malicious scripts, leading to data exfiltration, system compromise, and regulatory breach.
What To Do
- Upgrade Immediately: Install radare2 ≥ 6.1.4; the vulnerability is fixed in that version.
- Audit File Sources: Verify that PDB files come from trusted sources or are signed/verified before processing.
- Sandbox Execution: Run idp and other radare2 commands in isolated environments (e.g., containers) to prevent malicious code from affecting the host system.
- Apply Patch if Available: If a patch is released for older versions, apply it promptly.
- Monitor for Suspicious Files: Implement logging of PDB file metadata and alerts for abnormal section names or embedded newline characters.
If you cannot upgrade immediately—perhaps due to legacy dependencies—consider temporarily disabling the idp command until a secure version is available, or use an alternative tool for binary analysis.
The Bigger Picture
Command injection vulnerabilities in open-source reverse-engineering tools underscore the necessity of continuous software updates and rigorous input validation. This incident reflects a broader trend where attackers exploit trusted tooling by embedding malicious content within legitimate file formats.
How We Can Help
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