HIGH

CVE-2026-109331

CVSS v3

7.4

HIGH

EPSS Score

—

exploit probability

CISA KEV

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-109331 yet.

Full record on NVD

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.

Technical details

CVSS v3 Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2026-10-12
Last Modified: 2026-10-12

Frequently asked questions

What is CVE-2026-109331?

Is CVE-2026-109331 actively exploited?

Active exploitation of CVE-2026-109331 has not been confirmed.

What is the CVSS score for CVE-2026-109331?

CVE-2026-109331 has a CVSS v3 base score of 7.4 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

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