CVE-2026-112040 diem-project diem Sign-In BasedmUserActions.class.php redirect
An open redirect vulnerability in the diem Sign-In component allows attackers to redirect users to malicious sites via the Referer argument.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-112040?
CVE-2026-112040 is a medium-severity vulnerability in diem-project diem, published on 19 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A vulnerability was determined in diem-project diem up to 116974edfb9a5b8bd69cb13586dc62bcdbb485ad. This affects an unknown part of the file dmCorePlugin/plugins/dmUserPlugin/modules/dmUser/lib/BasedmUserActions.class.php of the component Sign-In. This manipulation of the argument Referer causes open redirect. The attack is possible to be carried out remotely. The exploit has been publicly disclosed and may be utilized. This product adopts a rolling release strategy to maintain continuous delivery. Therefore, version details for affected or updated releases cannot be specified. The project was informed of the problem early through an issue report but has not responded yet.
Weakness: CWE-601
Which versions are affected by CVE-2026-112040?
How do I fix CVE-2026-112040?
No fix has been published for CVE-2026-112040 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-112040 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-112040 exists.
Sources
Also known as GHSA-2fp3-3pqm-j39r.