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CVE-2026-84115— Cleo Harmony JWT Refresh Token connections privileges management

Quick assessment

Affected
Cleo Harmony
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.

Cleo Harmony 5.8.1.10 及更早版本中发现了一个漏洞。受影响的部分是组件 “JWT 刷新令牌处理程序” 中 文件的某个未知函数。通过对参数 进行操纵，会导致不当的特权管理。该攻击可远程实施。该漏洞的利用方式已公开，并可能已被利用。升级到版本 5.8.1.11 即可修复此问题。建议升级受影响组件。

CVSS 8.3 · High
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I. Basic Information for CVE-2026-84115

Vulnerability Information
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Vulnerability Title
Cleo Harmony JWT Refresh Token connections privileges management
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was found in Cleo Harmony up to 5.8.1.10. The affected element is an unknown function of the file /api/connections of the component JWT Refresh Token Handler. Performing a manipulation of the argument Bearer results in improper privilege management. The attack is possible to be carried out remotely. The exploit has been made public and could be used. Upgrading to version 5.8.1.11 is sufficient to fix this issue. It is recommended to upgrade the affected component.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
特权管理不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Cleo Harmony 5.8.1.0 cpe:2.3:a:cleo:harmony:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-84115

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III. Intelligence Information for CVE-2026-84115

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Vendor Advisories for CVE-2026-84115 (1)

Vendor Pages for CVE-2026-84115 (1)

Other References for CVE-2026-84115 (2)

IV. Related Vulnerabilities

Same product: Harmony
Same vendor: Cleo
Same weakness: CWE-269

V. Comments for CVE-2026-84115

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