What’s Vulnerable › Vulnerabilities

CVE-2026-82286: gpt-crawler Arbitrary File Write via outputFileName Parameter

• Severity: high (CVSS 8.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-28 · updated 2026-09-23
• Weakness: CWE-22

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.

Affected products

• BuilderIO gpt-crawler: through 1.5.1

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

Get alerted when CVE-2026-82286 or the next vulnerability affects your stack