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OtrsApplication

CVE-2026-48188

CRITICAL · 9.1 CVSS v3.1 Published 2026-06-01
Fix available
A fix is available. Upgrade to 2026.4.1 or later.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
An improper Input Validation vulnerability in OTRS or ((OTRS)) Community Edition database layer module allows an unauthenticated SQL injection which can lead to an authentication bypass. This issue only affects the system if the MySQL/MariaDB server is configured with the NO_BACKSLASH_ESCAPES SQL mode. This issue affects OTRS: * 7.0.X * 8.0.X * 2023.X * 2024.X * 2025.X * 2026.X before 2026.4.X * (OTRS)) Community Edition: 6.0.x Products based on the ((OTRS)) Community Edition also very likely to be affected

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

An improper input validation vulnerability in the OTRS database layer module enables unauthenticated SQL injection, which can lead to authentication bypass. The flaw is triggered specifically when the MySQL/MariaDB server runs with the NO_BACKSLASH_ESCAPES SQL mode, allowing attackers to inject malicious SQL queries without authentication.

MitigationUpgrade OTRS to version 2026.4.X or later, or alternatively reconfigure the MySQL/MariaDB server to disable NO_BACKSLASH_ESCAPES mode. This is a critical unauthenticated SQL injection with CVSS 9.1, requiring immediate remediation.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
OtrsApplication
Affected:<= 6.0.32>= 7.0.0, <= 8.0.37>= 2023.0.0, < 2026.4.1

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

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

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify installed OTRS version
    Check the OTRS version file (Kernel/Config.pm or var/log/Release.xml) or access Admin > System Administration > System Information
    Affected if Version is 6.0.32 or lower, between 7.0.0 and 8.0.37 inclusive, or between 2023.0.0 and 2026.4.0
  2. Verify database backend in use
    Check OTRS configuration files (Kernel/Config.pm) or OTRS admin interface for the configured database type
    Affected if Database is MySQL or MariaDB (the vulnerability only affects these database backends)
  3. Check MySQL/MariaDB SQL mode for NO_BACKSLASH_ESCAPES
    Connect to the MySQL/MariaDB database and run: SELECT @@SESSION.sql_mode; or check my.cnf for sql-mode setting
    Affected if The SQL mode includes NO_BACKSLASH_ESCAPES - this is the specific condition that makes the vulnerability exploitable

You are affected only if your OTRS version is in the vulnerable range AND your MySQL/MariaDB database has NO_BACKSLASH_ESCAPES enabled in the SQL mode configuration.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 2026.4.1 or later
Fixed in 2026.4.1
Interim mitigation

Upgrade OTRS to version 2026.4.X or later, or alternatively reconfigure the MySQL/MariaDB server to disable NO_BACKSLASH_ESCAPES mode. This is a critical unauthenticated SQL injection with CVSS 9.1, requiring immediate remediation.

Recommended fix High confidence

2026.4.1 or later

  1. 1. Identify the current OTRS installation version using the admin interface or command line
  2. 2. Create a complete backup of the OTRS database and application files
  3. 3. Download OTRS version 2026.4.1 or later from the official OTRS website
  4. 4. Stop the OTRS services (web server, scheduler, and any background processes)
  5. 5. Follow the OTRS upgrade documentation to apply the new version
  6. 6. Verify the database layer module has been updated to the fixed version
  7. 7. Restart OTRS services
  8. 8. Test that the SQL injection vulnerability is mitigated by verifying the fix is applied

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Otrs Scoped from the published advisory
  • Consultation3.0 h
  • Implementation6.0 h
  • Testing4.0 h
  • Review / QA2.0 h
15.0 hours of engineering $2,640
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-48188 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data