CVE-2026-82286

Received Received - Intake

gpt-crawler Path Traversal Vulnerability Allows Arbitrary File Write

Publication date: 2026-08-28

Last updated on: 2026-08-28

Assigner: VulnCheck

Description

gpt-crawler through 1.5.1 fails to validate the outputFileName parameter in the POST /crawl endpoint, allowing unauthenticated attackers to write arbitrary files to any filesystem path. Attackers can supply absolute paths or parent-directory segments to overwrite existing files with content sourced from attacker-controlled URLs.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-28

Last Modified

2026-08-28

Generated

2026-08-29

AI Q&A

2026-08-29

EPSS Evaluated

N/A

NVD

CVE-2026-82286

EUVD

EUVD-2026-67817

Affected Vendors & Products

Vendor	Product	Version / Range
builderio	gpt-crawler	to 1.5.1 (exc)
builderio	gpt-crawler	1.5.1

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-22	The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

Attack-Flow Graph

Executive Summary

gpt-crawler through version 1.5.1 has a flaw where the outputFileName parameter in the POST /crawl endpoint is not properly validated. This allows unauthenticated attackers to write arbitrary files to any location on the filesystem. Attackers can use absolute paths or parent directory segments to overwrite existing files with content from attacker-controlled URLs.

Detection Guidance

Check for unexpected files in system directories, especially those modified around the time of potential exploitation. Monitor network traffic for POST requests to /crawl endpoints with suspicious outputFileName parameters.

Impact Analysis

This vulnerability can lead to unauthorized file writes, potentially overwriting critical system files, configuration files, or sensitive data. Attackers could replace legitimate files with malicious content, leading to system compromise, data theft, or denial of service. It may also allow execution of arbitrary code if executable files are overwritten.

Compliance Impact

This vulnerability can lead to data breaches, unauthorized access, or data integrity issues, which may violate GDPR's requirements for data protection and HIPAA's rules for safeguarding protected health information. Non-compliance could result in legal penalties, fines, or reputational damage.

Mitigation Strategies

Upgrade gpt-crawler to a patched version beyond 1.5.1. If immediate upgrade is not possible, restrict network access to the /crawl endpoint and validate all input parameters server-side.

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