CVE-2026-109331

HIGH
MEDIUM Priority: 0.01 BB Relevance: 50/100
Published: 2026-10-12 Modified: 2026-10-26 First seen: 2026-10-29 Status: active

Attack Surface

Low Complexity No Auth No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Local
AC: Low
PR: None
UI: None
AT: Present
VC: High
VI: High
VA: High

Description

Network-AI from 5.14.0 before 5.15.2 contains a security control bypass vulnerability in the ClaudeHookBridge PreToolUse hook, which matches deny patterns only against the first present candidate field. A prompt-injected agent can place dangerous payloads in fields like Write content or an MCP script parameter beside a benign file_path or command, evading denyPatterns to write web shells or execute scripts.

Weakness Classification (1)

Bug Bounty Relevance

50 / 100
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

7.5 / 10.0 v4.0
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

EPSS — Exploitation Probability

0.14%
Raw Score 0.001350
Percentile 3.0%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00135
2026-10-28
0.00135

Intelligence Sources

mitre ref →
nvd ref →