CVE-2026-56138 Authenticated Path Traversal in AIL framework /objects/item/diff Allows Reading Gzip-Compressed Files
Authenticated users can exploit path traversal in the diff endpoint to read arbitrary gzip-compressed files accessible to the AIL process.
- 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-2026-56138?
CVE-2026-56138 is a medium-severity path traversal vulnerability in ail-project ail-framework, published on 19 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
AIL framework contains a path traversal vulnerability in the /objects/item/diff endpoint. The endpoint accepts item identifiers through the s1 and s2 query parameters and, prior to the fix, attempted to retrieve and compare item contents without first verifying that both referenced items existed as valid AIL objects.
An authenticated AIL user could craft malicious item identifiers containing path traversal sequences to cause the application to read gzip-compressed files accessible to the AIL process. This could result in unauthorized disclosure of local file contents, limited to files readable by the application and compatible with the expected gzip-compressed item format.
The issue was fixed by validating that both requested items exist before their contents are accessed.
Weakness: CWE-22
Which versions are affected by CVE-2026-56138?
How do I fix CVE-2026-56138?
No fix has been published for CVE-2026-56138 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-56138 being exploited?
There is no known exploitation of CVE-2026-56138 in the wild and no public exploit code.
Sources
Also known as GHSA-jmhf-2rhf-v8gj.