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CVE-2026-84115

Cleo Harmony JWT Refresh Token connections privileges management

Published: Sep 1, 2026Updated: Sep 1, 2026 Sources: CVE List NVDCWE-266
8.3HIGH
NVD MITRE
EPSS Score
0.3%
Top 79.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:CC:LI:LA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:LAvailability
Low
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Weaknesses

CWE-266CWE-269

Affected Products

Cleo
commercialaka lexicom, harmony, cleo harmony
HarmonyMixed
Enterprise Software / document-mgmt

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Privilege Escalation
View detailed technique mapping

References

https://support.cleo.com/hc/en-us/articles/30258468834583-Cleo-Harmony-5-8-1-Release-Notes#Version58111
support.cleo.com
https://vuldb.com/cve/CVE-2026-84115
vuldb.com
https://vuldb.com/submit/882468
vuldb.com
and 2 more references View all →
News mentions
2

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