Authenticated file read and deletion via avatar_url traversal
Published Apr 2, 2026 · Updated Apr 2, 2026
Path traversal in SillyTavern before 1.17.0 allows remote authenticated users to read or delete files under their user data root. The avatar_url validator rejects separators and NUL bytes but accepts '..', which path.join resolves from the chats directory to its parent. Exploitation requires a valid session and CSRF token; access remains confined to that user's data root, where secrets can be read and critical settings deleted.
Summary
What happened
Path traversal in SillyTavern before 1.17.0 allows remote authenticated users to read or delete files under their user data root. The avatar_url validator rejects separators and NUL bytes but accepts '..', which path.join resolves from the chats directory to its parent. Exploitation requires a valid session and CSRF token; access remains confined to that user's data root, where secrets can be read and critical settings deleted.
The record
- CVE
- CVE-2026-34524
- Published
- Apr 2, 2026
- Updated
- Apr 2, 2026
- Vendor
- SillyTavern
- Product
- SillyTavern
- Classifications
- CWE-22, T1485
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Apr 2, 2026CVE publishedPublication date reported by the CVE source.
- Apr 2, 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=< 1.17.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
- Upstream authenticated chat endpoint proof of conceptproof of concept · demonstrated
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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