CVE-2026-70561

TestLink 1.9.20 and prior contains an insecure direct object reference vulnerability that allows any authenticated user, including low-privilege guest accounts, to read arbitrary attachments by supplying an integer attachment ID to the attachmentdownload.php handler without any project or role authorization check. Attackers can enumerate sequential integer IDs through the attachment download endpoint to retrieve file contents from private projects they have no membership in, bypassing the per-project access control model and exposing test specifications, requirements documents, execution evidence, and other sensitive uploaded files across the entire installation.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/TestLinkOpenSourceTRMS/testlink-code
https://github.com/geo-chen/oss/blob/main/testlink-code.md
https://www.vulncheck.com/advisories/testlink-and-prior-authenticated-idor-via-attachmentdownload-php
https://github.com/geo-chen/oss/blob/main/testlink-code.md

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-07 19:18

Updated : 2026-08-10 13:20

NVD link : CVE-2026-70561

Mitre link : CVE-2026-70561

CVE.ORG link : CVE-2026-70561

JSON object : View

Products Affected

No product.

CWE

CWE-639

Authorization Bypass Through User-Controlled Key

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