Is this vulnerability remotely exploitable?

It can be, if an attacker can influence Dockerfiles, build configuration, or build arguments remotely—for example through a compromised repository, pull request, or misconfigured CI pipeline that accepts untrusted code. The exploitation path is through build configuration rather than a direct network endpoint.

What level of access does an attacker need to exploit this?

The attacker needs the ability to select or control a BuildKit frontend, typically by editing the `#syntax` directive in a Dockerfile or setting `--build-arg BUILDKIT_SYNTAX` in build commands or CI configuration. Without this control, the vulnerability cannot be directly triggered.

What is the safest general fix pattern for affected environments?

The safest pattern is to enforce strict whitelisting of trusted frontends and ensure BuildKit enforces directory boundaries when handling paths from frontend APIs. Additionally, treat build frontends as untrusted code by default and minimize the filesystem scope that BuildKit can affect.

Severity:

HIGH RISK

(8.4)

Path Traversal (CWE-22) in BuildKit Custom Frontends Allowing File Writes Outside State Directory

CVE-2026-33747

Published:

Mar 26, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

Remote Code Execution on the Router

April 6, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Remote Code Execution on Router Firmware

April 6, 2026

Vulnerability Type

Category:

Path Traversal / Directory Traversal

CWE:

CWE-22

Impact:

Arbitrary File Write Outside Expected Directory Boundaries

Severity:

HIGH RISK

(8.4)

CVSS Version:

3.1

Vulnerability Type

Category:

Path Traversal / Directory Traversal

CWE:

CWE-22

Impact:

Arbitrary File Write Outside Expected Directory Boundaries

Severity:

HIGH RISK

(8.4)

CVSS Version:

3.1

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Ask AI for summary of CodeAnt

Path Traversal (CWE-22) in BuildKit Custom Frontends Allowing File Writes Outside State Directory

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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