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CVE-2026-48187— Email with special content can lead to DoS

Quick assessment

Affected
OTRS AG OTRS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OTRS是德国OTRS公司的一个服务管理解决方案。 OTRS 8.0.X版本、2023.X版本、2024.X版本、2025.X版本和2026.X版本至2026.4.X之前版本存在安全漏洞，该漏洞源于电子邮件处理中资源分配不受控制，可能导致Web服务器中止。

CVSS 5.7 · Medium EPSS 0.36% · P27

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 7

VendorProduct Version RangeStatus
OTRS AG ((OTRS)) Community Edition 6.x unknown
OTRS AG OTRS 7.0.x unknown
8.0.x affected
2023.x affected
2024.x affected
2025.x affected
2026.x≤ 2026.3.x affected
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I. Basic Information for CVE-2026-48187

Vulnerability Information
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Vulnerability Title
Email with special content can lead to DoS
Source: CVE Program / CVE List V5
Vulnerability Description
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
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
OTRS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OTRS是德国OTRS公司的一个服务管理解决方案。 OTRS 8.0.X版本、2023.X版本、2024.X版本、2025.X版本和2026.X版本至2026.4.X之前版本存在安全漏洞，该漏洞源于电子邮件处理中资源分配不受控制，可能导致Web服务器中止。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
OTRS AG OTRS 7.0.x -
OTRS AG ((OTRS)) Community Edition 6.x -

II. Public POCs for CVE-2026-48187

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III. Intelligence Information for CVE-2026-48187

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Same Patch Batch · OTRS AG · 2026-06-01 · 7 CVEs total

CVE-2026-48188 9.1 CRITICAL SQL Injection via MySQL Quote Method
CVE-2026-48209 7.1 HIGH Reflected XSS in authenticated agent context
CVE-2026-48208 6.5 MEDIUM Denial-of-Service via SVG Rendering in Ticket
CVE-2026-48189 5.7 MEDIUM Bypass DedicatedAgentToCustomerGroups Setting
CVE-2026-48191 3.5 LOW Wrong Permission Handling in Document Search Article Meta Filters
CVE-2026-48190 3.5 LOW Incorrect handling of permissions in External Interface Config Item List module

IV. Related Vulnerabilities

Same product: OTRS
Same vendor: OTRS AG
Same weakness: CWE-400

V. Comments for CVE-2026-48187

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