CVE-2026-82286: Path Traversal (CVSS 8.6)

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.

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CVSS v3.1 Score

8.6

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L

EPSS — Exploit Prediction

0.0035

Probability of exploitation

0.28%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-22 Path Traversal

References

Other References

https://github.com/BuilderIO/gpt-crawler https://github.com/BuilderIO/gpt-crawler/blob/d2245d66a5ad60bf227a55c849135394cbecc9b5/src/config.ts https://github.com/BuilderIO/gpt-crawler/blob/d2245d66a5ad60bf227a55c849135394cbecc9b5/src/core.ts https://github.com/BuilderIO/gpt-crawler/issues/418 https://www.vulncheck.com/advisories/gpt-crawler-arbitrary-file-write-via-outputfilename-parameter https://github.com/BuilderIO/gpt-crawler/issues/418

Frequently Asked Questions

What is CVE-2026-82286? +

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. It has a CVSS v3.1 base score of 8.6 (HIGH).

How severe is CVE-2026-82286? +

CVE-2026-82286 has a CVSS v3.1 score of 8.6 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0035, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-82286? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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