Read the docs
TI-2026-47171 Aliases CVE-2026-66412GHSA-p3jw-q4jg-x8w9

Leantime all versions prior to and 3.6.2 Broken Access Control via tickets.getMilestone JSON-RPC

Priority MEDIUM 64CWE-639Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
High · None · None
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-639.

Summary

Leantime 3.6.2 and prior contains a broken access control vulnerability that allows authenticated users to read milestone data from projects they are not assigned to by supplying arbitrary integer milestone IDs to the tickets.getMilestone JSON-RPC endpoint. Attackers can enumerate integer milestone IDs through the JSON-RPC API to access project planning information, milestone titles, descriptions, and timelines across all projects on the instance regardless of project membership.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00415 36th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
LeantimeLeantimeup to 3.6.2—No fix listedCNA
  • Leantime VendorLeantime Affected up to 3.6.2 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:leantime:leantime:*:*:*:*:*:*:*:*——Leantime
  • cpe:2.3:a:leantime:leantime:*:*:*:*:*:*:*:* Versions — — ·Leantime

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-66412
  2. 2026-10-03 Alias added: GHSA-p3jw-q4jg-x8w9

References

Patch 2

Advisory 1

  • TI-2026-71921 Missing authorization in Leantime lets users create admin accounts CVSS 3.1HIGH 8.8
  • TI-2026-53555 Leantime JSON-RPC API contains a missing authorization vulnerability CVSS 3.1HIGH 8.8
  • TI-2024-18279 Leantime 3.0.6 is vulnerable to Cross Site Request Forgery (CSRF). CVSS 3.1HIGH 8.8
  • TI-2024-18354 Cross Site Scripting vulnerability in Leantime v3.0.6 allows attackers to execute… CVSS 3.1HIGH 7.6
  • TI-2026-62514 Leantime before 3.9.6 Unauthorized Plugin Installation via HTMX CVSS 4.0HIGH 7.1
  • TI-2024-18353 Cross Site Scripting vulnerability in Leantime 3.0.6 allows a remote attacker to execute… CVSS 3.1MEDIUM 5.4
See all 18 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences