CVE-2026-70561 TestLink 1.9.20 and prior Authenticated IDOR via attachmentdownload.php
Authenticated users can bypass project access controls to read arbitrary attachments from private projects by enumerating attachment IDs.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-70561?
CVE-2026-70561 is a high-severity missing authorization vulnerability in TestLinkOpenSourceTRMS TestLink, published on 7 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-639
Which versions are affected by CVE-2026-70561?
How do I fix CVE-2026-70561?
No fix has been published for CVE-2026-70561 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-70561 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-70561 exists.
Sources
Also known as GHSA-wmvr-m7cj-9g8w.