CVE-2026-48187 PUBLISHED

Email with special content can lead to DoS

Assigner: OTRS
Reserved: 21.05.2026 Published: 01.06.2026 Updated: 01.06.2026

An uncontrolled allocation of resources without limits or throttling in the e-mail handling in OTRS allows excessive allocation which may lead to the abortion of the webserver.This issue affects OTRS:

8.0.X
2023.X
2024.X
2025.X
2026.X before 2026.4.X

Please note that ((OTRS)) Community Edition 6.x, OTRS 7.x and products based on the ((OTRS)) Community Edition also very likely to be affected

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
CVSS Score: 5.7

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	Low	Integrity Impact	None
User Interaction	Required	Availability Impact	High

CVSS 3.1

Product Status

Vendor	OTRS AG
Product	OTRS
Versions	Default: unknown Version 7.0.x is unknown Version 8.0.x is affected Version 2023.x is affected Version 2024.x is affected Version 2025.x is affected affected from 2026.x to 2026.3.x (incl.)

Vendor	OTRS AG
Product	((OTRS)) Community Edition
Versions	Default: unknown Version 6.x is unknown

Solutions

Update to OTRS 2026.4.1. or later. Please note that there will be no OTRS 7 patches

References

https://otrs.com/release-notes/otrs-security-advisory-2026-06/

Problem Types

CWE-400 Uncontrolled Resource Consumption CWE
CWE-770 Allocation of Resources Without Limits or Throttling CWE

Impacts

CAPEC-130 Excessive Allocation