CVE-2026-82286
gpt-crawler Arbitrary File Write via outputFileName Parameter
CVSS Score
8.6
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-22 |
| Vendor | builderio |
| Product | gpt-crawler |
| Published | Aug 28, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
High
Availability
Low
Affected Versions
BuilderIO / gpt-crawler
0 ≤ 1.5.1
References
github.com: https://github.com/BuilderIO/gpt-crawler/issues/418 github.com: https://github.com/BuilderIO/gpt-crawler github.com: https://github.com/BuilderIO/gpt-crawler/blob/d2245d66a5ad60bf227a55c849135394cbecc9b5/src/core.ts github.com: https://github.com/BuilderIO/gpt-crawler/blob/d2245d66a5ad60bf227a55c849135394cbecc9b5/src/config.ts vulncheck.com: https://www.vulncheck.com/advisories/gpt-crawler-arbitrary-file-write-via-outputfilename-parameter
Credits
🔍 George Chen