CVE-2026-84115CWE-266CWE-269privilege-escalation

CVE-2026-84115

High · published September 1, 2026

CVSS v3.1
8.3
EPSS
0%
Percentile
39.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.3 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L
CVSS v4.0
6.9 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P
EPSS
0.00472 · 39.9th percentile
Weaknesses
CWE-266 · Incorrect Privilege Assignment; CWE-269 · Improper Privilege Management
Published
2026-09-01T19:17Z
References (6)
https://support.cleo.com/hc/en-us/articles/30258468834583-Cleo-Harmony-5-8-1-Release-Notes#Version58111 · [email protected]https://vuldb.com/cve/CVE-2026-84115 · [email protected]https://vuldb.com/submit/882468 · [email protected]https://vuldb.com/vuln/397558 · [email protected]https://vuldb.com/vuln/397558/cti · [email protected]https://vuldb.com/submit/882468 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 03 SEP 03:32Z
    EPSS moved — → 0%
    epss
  • 01 SEP 15:00Z
    Cleo Harmony JWT Refresh Token connections privileges management
    cvelistv5