CVE-2026-82286Public exploitNetwork attack vector

Unauthenticated file write via unchecked output path

Published Aug 28, 2026 · Updated Aug 28, 2026

Path traversal in Builder.io GPT Crawler 1.5.1 and earlier allows remote attackers to write files via unauthenticated POST /crawl requests. The config schema accepts outputFileName as any string, and writeBatchToFile passes its derived absolute or parent-relative path directly to writeFile. API server mode must be network reachable; successful requests create or overwrite JSON files at any path writable by the server process.

CVSS severity8.6
High
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Builder.io GPT Crawler 1.5.1 and earlier allows remote attackers to write files via unauthenticated POST /crawl requests. The config schema accepts outputFileName as any string, and writeBatchToFile passes its derived absolute or parent-relative path directly to writeFile. API server mode must be network reachable; successful requests create or overwrite JSON files at any path writable by the server process.

The record

CVE
CVE-2026-82286
Published
Aug 28, 2026
Updated
Aug 28, 2026
Vendor
Builder.io
Product
GPT Crawler
Classifications
CWE-22, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=1.5.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Builder.io · GPT Crawlerversion=0 <=1.5.1

Published CVSS scores

8.6BuilderIO/gpt-crawler issue #418CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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