Ghidra Improper Annotation Processing Leads to RCE (CVE-2026-4946)

CVE-2026-4946 identifies a critical vulnerability affecting Ghidra versions prior to 12.0.3. The vulnerability stems from the improper handling of annotation directives, specifically the @execute annotation, embedded within automatically extracted binary data. Normally, the @execute annotation is reserved for trusted user-authored comments. However, due to the flaw, Ghidra parses these annotations even when they originate from auto-analysis processes like CFStrings extraction in Mach-O binaries. Consequently, a malicious actor can craft a binary file containing a seemingly harmless clickable element (text), which, when clicked by an analyst, triggers the execution of arbitrary, attacker-controlled commands on the analyst's machine. The vulnerability allows remote code execution on the Ghidra analyst's workstation.

Attack Chain

1. Attacker crafts a malicious binary file containing embedded annotation directives within automatically extracted data (e.g., CFStrings in a Mach-O binary). The directive uses the @execute annotation to embed a command.
2. The analyst loads the crafted binary into a vulnerable version of Ghidra (prior to 12.0.3).
3. Ghidra's auto-analysis engine processes the binary and extracts the embedded data, including the malicious @execute annotation.
4. Ghidra displays the extracted data in the UI, rendering the malicious annotation as a seemingly benign clickable element.
5. The analyst, unaware of the malicious intent, clicks on the displayed element within the Ghidra UI.
6. Upon clicking, Ghidra improperly processes the @execute annotation and executes the attacker-controlled command on the analyst's machine.
7. The attacker achieves arbitrary command execution within the security context of the analyst's Ghidra process.
8. The attacker pivots from the initial command execution to further compromise the analyst's system (e.g., installing malware, exfiltrating sensitive data).

Impact

Successful exploitation of CVE-2026-4946 allows attackers to execute arbitrary commands on the system of a Ghidra analyst. This could lead to complete system compromise, data theft, or the installation of persistent backdoors. Given that Ghidra is used by reverse engineers analyzing potentially malicious software, this vulnerability poses a significant risk. The impact is especially severe because analysts often work with sensitive data and privileged accounts, potentially allowing attackers to gain access to highly sensitive information. The number of potential victims is large due to Ghidra's widespread use in security research and software development.

Recommendation

• Upgrade Ghidra to version 12.0.3 or later to patch CVE-2026-4946.
• Implement application control to restrict the execution of unauthorized processes spawned by Ghidra, mitigating the impact of successful exploitation.
• Monitor process execution events for unusual or unexpected child processes spawned by the Ghidra process using the process_creation Sigma rules provided.