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CVE-2026-91145— Activiti through 7.1.0.M6 Expression Injection via Mail Task

Quick assessment

Affected
Activiti Activiti
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Activiti是Activiti组织开源的一款企业级业务流程管理引擎软件。 Activiti 7.1.0.M6及之前版本存在代码注入漏洞，该漏洞源于未能验证流程变量中的#{}延迟表达式，攻击者可注入以#{开头的表达式绕过表达式过滤，在邮件任务使用变量支持的正文字段时于完整Spring上下文中求值，导致调用应用Bean的方法。

CVSS 7.1 · High EPSS 0.42% · P37

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
Activiti Activiti ≤ 7.1.0.M6 affected
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I. Basic Information for CVE-2026-91145

Vulnerability Information
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Vulnerability Title
Activiti through 7.1.0.M6 Expression Injection via Mail Task
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
表达式语言语句中使用的特殊元素转义处理不恰当(表达式语言注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Activiti 代码注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Activiti是Activiti组织开源的一款企业级业务流程管理引擎软件。 Activiti 7.1.0.M6及之前版本存在代码注入漏洞，该漏洞源于未能验证流程变量中的#{}延迟表达式，攻击者可注入以#{开头的表达式绕过表达式过滤，在邮件任务使用变量支持的正文字段时于完整Spring上下文中求值，导致调用应用Bean的方法。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Activiti Activiti 0 ~ 7.1.0.M6 -

II. Public POCs for CVE-2026-91145

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III. Intelligence Information for CVE-2026-91145

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Vendor Advisories for CVE-2026-91145 (1)

Security Blog Posts for CVE-2026-91145 (1)

Vendor Pages for CVE-2026-91145 (2)

Other References for CVE-2026-91145 (1)

IV. Related Vulnerabilities

Same product: Activiti
Same weakness: CWE-917