CVE-2026-30303
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedThe command auto-approval module in Axon Code contains an OS Command Injection vulnerability, rendering its whitelist security mechanism ineffective. The vulnerability stems from the incorrect use of an incompatible command parser (the Unix-based shell-quote library) to analyze commands on the Windows platform, coupled with a failure to correctly handle Windows CMD-specific escape sequences (^). Attackers can exploit this discrepancy between the parsing logic and the execution environment by constructing payloads such as git log ^" & malicious_command ^". The Axon Code parser is deceived by the escape characters, misinterpreting the malicious command connector (&) as being within a protected string argument and thus auto-approving the command. However, the underlying Windows CMD interpreter ignores the escaped quotes, parsing and executing the subsequent malicious command directly. This allows attackers to achieve arbitrary Remote Code Execution (RCE) after bypassing what appears to be a legitimate Git whitelist check.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceThe command auto-approval module in Axon Code uses a Unix-based shell-quote library to parse commands on Windows, failing to handle CMD escape sequences (^). Attackers bypass the whitelist by crafting payloads like git log ^" & malicious_command ^" - the parser incorrectly treats & as within a protected string due to escaped quotes, but Windows CMD ignores these and executes the malicious command, achieving RCE.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data<= 4.123.1CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Confirm Axon Code installationCheck if Matterai Axon Code is installed on the system. Look for installation directories, or run: where axon-code, or check Program Files for Axon Code folder.Affected if Axon Code is not installed on the system.
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Identify installed Axon Code versionRun the Axon Code version command (e.g., axon-code --version, or check the application metadata/installed programs list). Compare the version number to the affected range: <= 4.123.1.Affected if The installed version is 4.123.1 or lower.
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Verify Windows operating systemCheck the operating system where Axon Code is running (run: systeminfo | findstr /B /C:"OS Name" or ver). This vulnerability only affects Windows environments.Affected if Axon Code is running on a Windows host.
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Check command auto-approval module statusExamine Axon Code configuration files or settings for the command auto-approval feature. Look for configuration keys like 'autoApproveCommands', 'commandWhitelist', or similar settings in config files or the web UI.Affected if The command auto-approval or command whitelist feature is enabled.
The environment is affected if Axon Code version 4.123.1 or lower is installed on Windows with the command auto-approval module enabled.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataReplace the Unix shell-quote library with a proper Windows CMD parser that correctly handles ^ escape sequences, or implement a safer command execution model that avoids shell interpretation altogether (e.g., direct process spawning without shell invocation).
- Consultation6.0 h
- Implementation20.0 h
- Testing12.0 h
- Review / QA6.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-30303 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-30303 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
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