Unauthorized file access via streaming Range requests
Published Mar 31, 2026 · Updated Mar 31, 2026
Improper authorization in Parse Server before 8.6.71 or from 9.0.0 before 9.7.1-alpha.1 allows remote attackers to read protected files. The FilesRouter streaming branch serves HTTP Range responses without first running the afterFind(Parse.File) trigger, while the corrected path resolves the session token and applies its validators before sending data. Exploitation requires a streaming-capable storage adapter and a file whose access depends on afterFind authorization, and it exposes file contents without altering them.
Summary
What happened
Improper authorization in Parse Server before 8.6.71 or from 9.0.0 before 9.7.1-alpha.1 allows remote attackers to read protected files. The FilesRouter streaming branch serves HTTP Range responses without first running the afterFind(Parse.File) trigger, while the corrected path resolves the session token and applies its validators before sending data. Exploitation requires a streaming-capable storage adapter and a file whose access depends on afterFind authorization, and it exposes file contents without altering them.
The record
- CVE
- CVE-2026-34784
- Published
- Mar 31, 2026
- Updated
- Mar 31, 2026
- Vendor
- Parse Platform
- Product
- Parse Server
- Classifications
- CWE-285, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 31, 2026CVE publishedPublication date reported by the CVE source.
- Mar 31, 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.
- Affected versionversion=< 8.6.71
- Affected versionversion=>= 9.0.0, < 9.7.1-alpha.1
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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Public exploit references
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Technologies
Your stack
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Your stack
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