Arbitrary file write via smart-object path traversal
Published Sep 10, 2026 · Updated Sep 10, 2026
Path traversal in psd-tools before 1.17.1 allows attackers to write arbitrary files by processing a crafted PSD or PSB file. SmartObject.save() passes an embedded, attacker-controlled filename directly to a write operation without rejecting absolute paths or parent-directory traversal. Exploitation requires a consuming application to extract an untrusted file; external smart objects can also disclose any file readable by that process.
Summary
What happened
Path traversal in psd-tools before 1.17.1 allows attackers to write arbitrary files by processing a crafted PSD or PSB file. SmartObject.save() passes an embedded, attacker-controlled filename directly to a write operation without rejecting absolute paths or parent-directory traversal. Exploitation requires a consuming application to extract an untrusted file; external smart objects can also disclose any file readable by that process.
The record
- CVE
- CVE-2026-49836
- Published
- Sep 10, 2026
- Updated
- Sep 10, 2026
- Vendor
- psd-tools
- Product
- psd-tools
- Classifications
- CWE-22, CWE-73, T1204.002
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 10, 2026CVE publishedPublication date reported by the CVE source.
- Sep 10, 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=< 1.17.1
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
- SmartObject.save path-traversal proof of conceptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
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