BuilderIO gpt-crawler up to 1.5.1 outputFileName path traversal

Summaryinfo

A vulnerability was found in BuilderIO gpt-crawler up to 1.5.1 and classified as critical. This affects an unknown part. Executing a manipulation of the argument outputFileName can lead to path traversal. The identification of this vulnerability is CVE-2026-82286. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability has been found in BuilderIO gpt-crawler up to 1.5.1 and classified as critical. This vulnerability affects an unknown code. The manipulation of the argument outputFileName with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-82286 since 08/28/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 08/28/2026). The MITRE ATT&CK project declares the attack technique as T1006.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Artificial Intelligence Software

Vendor

• BuilderIO

Name

• gpt-crawler

Version

• 1.5.0
• 1.5.1

Website

• Product: https://github.com/BuilderIO/gpt-crawler/

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