Medium 6.3Published Jul 12, 2026

CVE-2026-15509Leantime JSON-RPC Endpoint addUser improper authorization

Updated under an hour ago (Oct 28, 2026, 2:23 AM ET)

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It affects n/a Leantime. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for n/a Leantime

Exploited in the last 30 days

A vulnerability has been found in Leantime up to 3.8.0. This impacts the function editUser/addUser of the component JSON-RPC Endpoint. The manipulation of the argument role leads to improper authorization. The attack is possible to be carried out remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

CVSS: 6.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
Weakness (CWE): CWE-285, CWE-266
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulDB
NVD analysis: Deferred
Record last updated: Jul 15, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

n/a Leantime leantime:leantime	3.0; 3.1; 3.2; 3.3; 3.4; 3.5; 3.6; 3.7; and 1 more ranges	CNA record

References

References

https://vuldb.com/vuln/377838	vdb-entry, technical-description
https://vuldb.com/vuln/377838/cti	signature, permissions-required
https://vuldb.com/cve/CVE-2026-15509	third-party-advisory
https://vuldb.com/submit/846167	third-party-advisory
https://bytium.com/insights/leantime-priv-escalation-vulnerability-low-priv-to-owner	exploit

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.