Network-AI ClaudeHookBridge before 5.15.1 truncates the target string to 500 characters before evaluating denyPatterns, while Claude Code executes the full untruncated command. Attackers can position dangerous content past byte 500 in a Bash command field to bypass the operator's hard-deny list and execute arbitrary commands.
Casky was already ahead
This CVE exploits attack patterns that Casky's 0matched skills already investigate — long before this vulnerability was disclosed. Claude's reasoning model maps these techniques to MITRE ATT&CK, so practitioners who ran these skills have already seen the threat behaviour in their findings.
CVE-2026-73614 is a critical input validation flaw in Network-AI ClaudeHookBridge versions before 5.15.1 that creates a dangerous divergence between security filtering and command execution. The vulnerability stems from truncating user input to 500 characters during deny-pattern validation, while the actual Bash command executor processes the complete untruncated string. This allows attackers to embed malicious payloads beyond the 500-character boundary, effectively bypassing the operator's configured hard-deny list and executing arbitrary system commands. Organizations using ClaudeHookBridge for AI-assisted command execution face immediate risk of unauthorized code execution, privilege escalation, and system compromise, particularly in DevOps and automation environments where Claude AI integrates with infrastructure tooling.
While this CVE maps to CWE-436 (Interpretation Conflict) rather than specific MITRE ATT&CK techniques, Casky's security skills suite would detect the attack patterns underlying this vulnerability through Claude AI's extended reasoning capabilities applied to command-line analysis. Practitioners using Casky would observe detection signals focused on input validation anomalies—specifically identifying when filtering logic operates on truncated data while execution engines process full payloads, a classic interpretation conflict pattern. Security teams would examine command logs for suspiciously positioned dangerous content (SQL injection, shell metacharacters, system commands) appearing after byte 500 boundaries, alongside mismatches between approved patterns and actual command execution. Although the 0 matching skills reflects the specific nature of this bridge software, Casky's reasoning-enhanced analysis would surface the underlying abuse pattern: denial-of-service evasion through parser differential attacks, enabling practitioners to hunt for similar truncation-bypass techniques across other input validation implementations in their environment.
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