CVE-2026-91145
High
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.
SeverityHigh
CVSS7.1
Exploit probability—
ProductActiviti
PublishedSep 14, 2026
First seenSep 14, 2026
Weakness typeCWE-917Expression language injection
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Activiti Activiti | v ≤ 7.1.0.M6 | — |
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