CVE-2026-48188: An improper Input Validation vulnerability in OTRS or ((OTRS)) Community Edition database layer module allows

This month

CRITICAL 9.1REMOTEUPGRADE

CVE-2026-48188 is a critical-severity flaw (CVSS 9.1) affecting otrs. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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:

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.7% (top 46%)
CISA exploited list	No
Weakness	CWE-20
Published	2026-06-01
Last modified	2026-07-22

Publisher (CNA): OTRS AG · Vendor: otrs

Last updated 2026-07-22 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-01 04:16 UTCPublished CVE record published
2026-07-22 07:10 UTCUpdated Record last modified

otrs otrs UPGRADE

Affected: <= 6.0.32 · >= 7.0.0 and <= 8.0.37 · >= 2023.0.0 and < 2026.4.1

Fixed in: 2026.4.1

Safe to downgrade to: a release before 7.0.0

1. Check installed version

apt-cache policy otrs || rpm -q otrs || otrs --version

2. UPGRADE to 2026.4.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade otrs

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade otrs

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 7.0.0 (Debian / Ubuntu)

apt-cache madison otrs sudo apt install otrs=<VERSION_BEFORE_7.0.0> sudo apt-mark hold otrs

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list otrs sudo dnf downgrade otrs-<VERSION_BEFORE_7.0.0> sudo dnf versionlock add otrs

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-48188?

otrs: upgrade to 2026.4.1. Exact commands for each OS are on this page.

Is CVE-2026-48188 being exploited?

CVE-2026-48188 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-48188 affect?

CVE-2026-48188 affects otrs. Severity is critical (CVSS 9.1). 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/Maria

How urgent is CVE-2026-48188?

Priority 50/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

MySQL vulnerabilities · MariaDB vulnerabilities

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References

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