CVE-2026-48188 SQL Injection via MySQL Quote Method

What is CVE-2026-48188?

CVE-2026-48188 is a critical SQL injection vulnerability in Otrs Otrs, published on 1 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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

Weakness: CWE-20

Which versions are affected by CVE-2026-48188?

It affects 1 product.

Products include Otrs Otrs.

How do I fix CVE-2026-48188?

Upgrade to a fixed version.

Use parameterised queries everywhere and never build SQL by joining strings. Upgrade affected software first; a web application firewall only buys time. More about SQL injection.

Is CVE-2026-48188 being exploited?

There is no known exploitation of CVE-2026-48188 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

Other vulnerabilities in Otrs Otrs

• CVE-2013-4717 SQL injection in n/a High 8.8
• CVE-2017-14635 Code injection in n/a High 8.8
• CVE-2023-5422 SSL Certificates are not checked for E-Mail Handling High 8.7
• CVE-2023-6254 Password is send back to client High 8.1
• CVE-2023-2534 Information disclouse and DoS via websocket push events High 7.6

All Otrs Otrs vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2026-48188, GHSA-4vhj-5qc2-97wr, UBUNTU-CVE-2026-48188.