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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是美国Cleo公司的一款企业业务协作与集成解决方案。 Cleo Harmony 5.8.1.10及之前版本存在权限许可和访问控制问题漏洞，该漏洞源于JWT Refresh Token Handler组件中/api/connections文件对参数Bearer的操作不当，导致权限管理不当，攻击者可能远程利用该漏洞。

CVSS 8.3 · High EPSS 0.47% · P40

Affected Version Matrix 12

VendorProduct Version RangeStatus
Cleo Harmony 5.8.1.0 affected
5.8.1.1 affected
5.8.1.2 affected
5.8.1.3 affected
5.8.1.4 affected
5.8.1.5 affected
5.8.1.6 affected
5.8.1.7 affected
… +4 more rows
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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
Vulnerability Title
Cleo Harmony 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cleo Harmony是美国Cleo公司的一款企业业务协作与集成解决方案。 Cleo Harmony 5.8.1.10及之前版本存在权限许可和访问控制问题漏洞，该漏洞源于JWT Refresh Token Handler组件中/api/connections文件对参数Bearer的操作不当，导致权限管理不当，攻击者可能远程利用该漏洞。
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
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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