---
title: "CVE-2026-93582: OTRS Community Edition - Authentication Bypass"
description: "OTRS Community Edition <= 6 contains an authentication bypass caused by trusting HTTP_REMOTE_USER environment variable from attacker-controlled HTTP headers, letting unauthenticated remote attackers impersonate users, exploit requires HTTP Basic Authentication backend and vulnerable web server environment."
url: https://panop.io/threat-heartbeat/CVE-2026-93582/
---

# CVE-2026-93582 OTRS Community Edition - Authentication Bypass

OTRS Community Edition <= 6 contains an authentication bypass caused by trusting HTTP\_REMOTE\_USER environment variable from attacker-controlled HTTP headers, letting unauthenticated remote attackers impersonate users, exploit requires HTTP Basic Authentication backend and vulnerable web server environment.

CVSS base score 9.4 /10

Critical

CISA KEV

Not listed

Public exploit

None known

EPSS

0.39% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-93582)

## Details

Type

Authentication Bypass

Impact

Broken Authentication, Data Tampering, Information Disclosure

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

Published

12 October 2026

Updated

15 October 2026

Weakness

[CWE-290](https://cwe.mitre.org/data/definitions/290.html)

## Vendor fix

Upgrade to OTRS 7 or later where this issue is fixed or apply security hardening to remove HTTP\_REMOTE\_USER fallback.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-93582](https://nvd.nist.gov/vuln/detail/CVE-2026-93582)
- [https://otrs.com/release-notes/otrs-security-advisory-2026-18/](https://otrs.com/release-notes/otrs-security-advisory-2026-18/)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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