CVE-2026-85605
Received Received - Intake

Slink Unauthorized Comment Access Vulnerability

Publication date: 2026-09-04

Last updated on: 2026-09-04

Assigner: VulnCheck

Description
Slink before 1.12.3 fails to properly authorize access to image comment endpoints, allowing unauthenticated attackers to read comment threads via GET /api/image/{imageId}/comments and server-sent-events subscriptions. Attackers who obtain image IDs out of band can retrieve full comment threads on public images and subscribe to live comment updates without authentication or authorization checks.

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Meta Information

Published
2026-09-04
Last Modified
2026-09-04
Generated
2026-09-04
AI Q&A
2026-09-04
EPSS Evaluated
N/A
NVD
CVE-2026-85605
EUVD
EUVD-2026-71221

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
andrii-kryvoviaz slink to 1.12.3 (exc)
andrii-kryvoviaz slink 1.12.3

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.

Attack-Flow Graph

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Executive Summary

This vulnerability affects Slink versions before 1.12.3. It allows unauthenticated attackers to read and monitor comment threads on images by accessing endpoints like GET /api/image/{imageId}/comments or subscribing to server-sent-events without proper authorization checks. Attackers need the image ID, which is a random UUIDv4 not exposed by unauthenticated endpoints, so they must obtain it through other means.

Detection Guidance

To detect this vulnerability, check if your Slink instance is running a version before 1.12.3. Use commands like 'curl -X GET http://<your-slink-server>/api/image/{imageId}/comments' to test for unauthorized access to comment endpoints. If the server returns comment data without authentication, the system is vulnerable.

Impact Analysis

Unauthenticated attackers can read comment threads on public images and subscribe to live comment updates in real time. Even if images are switched from public to private, comment threads remain accessible to anyone with the image ID. This exposes sensitive discussions or data in comments to unauthorized parties.

Compliance Impact

This vulnerability could potentially impact compliance with GDPR and HIPAA by exposing sensitive comment data without authorization. GDPR requires protecting personal data, and unauthorized access to comments may violate principles of lawfulness and security. HIPAA mandates safeguards for protected health information, and similar exposure risks apply if comments contain such data. The lack of authorization checks undermines data protection measures required by these regulations.

Mitigation Strategies

Immediately upgrade Slink to version 1.12.3 or later. Ensure the patch enforces authorization checks on comment endpoints and restricts SSE streams to authorized users. Verify that comment threads are no longer accessible without proper authentication.

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