CVE-2026-91145 Activiti through 7.1.0.M6 Expression Injection via Mail Task
Attackers can inject Spring expressions into Activiti mail tasks to execute arbitrary code on application beans.
- 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-2026-91145?
CVE-2026-91145 is a high-severity code injection vulnerability in Activiti, published on 14 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Activiti through 7.1.0.M6 fails to validate hash-brace deferred expressions in process variables, allowing attackers to bypass expression filtering. Attackers can inject expressions beginning with #{ that are stored and later evaluated in the full Spring context when a mail task uses variable-backed body fields, enabling method invocation on application beans.
Weakness: CWE-917
Which versions are affected by CVE-2026-91145?
How do I fix CVE-2026-91145?
No fix has been published for CVE-2026-91145 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-91145 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-91145 exists.
Sources
Also known as GHSA-2x64-98jc-j98r.