CVE-2026-112039 diem-project diem Administrative Console actions.class.php append cross site scripting
Remote attackers can execute arbitrary scripts via the dm_command argument in the diem Administrative Console, potentially compromising user sessions.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-112039?
CVE-2026-112039 is a medium-severity cross-site scripting vulnerability in diem-project diem, published on 19 Oct 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
A vulnerability was found in diem-project diem up to 116974edfb9a5b8bd69cb13586dc62bcdbb485ad. Affected by this issue is the function append of the file dmAdminPlugin/modules/dmConsole/actions/actions.class.php of the component Administrative Console. The manipulation of the argument dm_command results in cross site scripting. The attack can be executed remotely. The exploit has been made public and could be used. This product implements a rolling release for ongoing delivery, which means version information for affected or updated releases is unavailable. The project was informed of the problem early through an issue report but has not responded yet.
Which versions are affected by CVE-2026-112039?
How do I fix CVE-2026-112039?
No fix has been published for CVE-2026-112039 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-112039 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-112039 exists.
Sources
Also known as GHSA-4g4g-ph7c-qhh4.