Syntx's command auto-approval module contains a critical OS command injection vulnerability that renders its whitelist security mechanism c…

published 2026-03-30 7 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-17186

cvss: 9.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.2%; EPSS 1.2% chance of exploitation in 30 days, percentile 68%
public exploits: 0; none known

Syntx's command auto-approval module contains a critical OS command injection vulnerability that renders its whitelist security mechanism completely ineffective. The system relies on fragile regular expressions to parse command structures; while it attempts to intercept dangerous operations, it fails to account for standard Shell command substitution syntax (specifically $(...)and backticks ...). An attacker can construct a command such as git log --grep="$(malicious_command)", forcing Syntx to misidentify it as a safe git operation and automatically approve it. The underlying Shell prioritizes the execution of the malicious code injected within the arguments, resulting in Remote Code Execution without any user interaction.

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: total
Assessed: 7 mo ago (2026-04-01)

Exploit prediction

1.19% chance of exploitation in the next 30 days, higher than 68% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Classification

Weakness

CWE-94 Improper Control of Generation of Code

References

syntx.dev /
broken-link
github.com /Secsys-FDU/LLM-Tool-Calling-CVEs/issues/5
third-party-advisory

Sources

CVE List CVE-2026-30305
NVD CVE-2026-30305

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Summary