Internal resource disclosure via unguarded document loaders
Published Sep 15, 2026 · Updated Sep 15, 2026
Server-side request forgery in Flowise before 3.1.4 allows remote attackers to read internal resources through document-loader URLs. The Cheerio, Playwright, and Puppeteer loaders fetch attacker-controlled URLs without applying Flowise's HTTP deny-list checks. Exploitation requires control of a loader URL and returns fetched cloud metadata or private-service content as document text.
Summary
What happened
Server-side request forgery in Flowise before 3.1.4 allows remote attackers to read internal resources through document-loader URLs. The Cheerio, Playwright, and Puppeteer loaders fetch attacker-controlled URLs without applying Flowise's HTTP deny-list checks. Exploitation requires control of a loader URL and returns fetched cloud metadata or private-service content as document text.
The record
- CVE
- CVE-2026-91938
- Published
- Sep 15, 2026
- Updated
- Sep 15, 2026
- Vendor
- FlowiseAI
- Product
- Flowise
- Classifications
- T1190
- Attack vector
- network
- Privileges
- Unavailable
Timeline
How it unfolded
- Sep 15, 2026CVE publishedPublication date reported by the CVE source.
- Sep 15, 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?
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- Affected versionversion=0 <3.1.4
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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