CVE-2026-17613
Received Received - Intake

Penpot File Overwrite via Unauthorized RPC Command

Publication date: 2026-08-05

Last updated on: 2026-08-05

Assigner: CERT/CC

Description
Penpot’s ::import-binfile RPC command lacks authorization on the optional file-id parameter, allowing any authenticated user to overwrite any files on the target server and subscribe to WebSocket events, enabling full data exfiltration and data poisoning.

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Meta Information

Published
2026-08-05
Last Modified
2026-08-05
Generated
2026-08-05
AI Q&A
2026-08-05
EPSS Evaluated
N/A
NVD
CVE-2026-17613
EUVD
EUVD-2026-53386

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
kaleidos penpot 1.20
kaleidos penpot 2.17.0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-862 The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

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Executive Summary

Penpot’s ::import-binfile RPC command has a missing authorization check on the file-id parameter. This allows any authenticated user to overwrite any files on the server and subscribe to WebSocket events, which could lead to data exfiltration or data poisoning.

Detection Guidance

Detecting this vulnerability requires monitoring for unauthorized file ownership changes and suspicious import operations. Check Penpot server logs for RPC commands like ::import-binfile with mismatched file IDs. Look for WebSocket event subscriptions from unexpected users. Inspect file metadata for sudden re-parenting to different projects.

Impact Analysis

An attacker with access could overwrite sensitive files, steal data via WebSocket events, or corrupt data by injecting malicious content. This affects confidentiality, integrity, and availability of stored information.

Compliance Impact

This vulnerability could lead to unauthorized data access or modification, violating GDPR’s integrity and confidentiality principles or HIPAA’s safeguards for protected health information. Compliance risks include data breaches and loss of trust.

Mitigation Strategies

Apply the latest security patch from Penpot immediately. Disable the ::import-binfile RPC command if not required. Review all user permissions and restrict access to authenticated users only. Monitor for unauthorized file modifications or WebSocket subscriptions.

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