Reader file disclosure via followed asset symlinks
Published Sep 4, 2026 · Updated Sep 4, 2026
Path traversal in SiYuan before 3.8.2 allows remote authenticated users with reader access to read files outside the workspace. The reader-accessible file-read endpoint validates a logical path under data/assets but follows its symlink when opening the file, so the check does not constrain the resolved target. Exploitation requires reader access and an asset symlink that resolves beyond the workspace; successful requests disclose the target file bytes.
Summary
What happened
Path traversal in SiYuan before 3.8.2 allows remote authenticated users with reader access to read files outside the workspace. The reader-accessible file-read endpoint validates a logical path under data/assets but follows its symlink when opening the file, so the check does not constrain the resolved target. Exploitation requires reader access and an asset symlink that resolves beyond the workspace; successful requests disclose the target file bytes.
The record
- CVE
- CVE-2026-85583
- Published
- Sep 4, 2026
- Updated
- Sep 4, 2026
- Vendor
- SiYuan Note
- Product
- SiYuan
- Classifications
- T1005
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 4, 2026CVE publishedPublication date reported by the CVE source.
- Sep 4, 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 <3.8.2
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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