CVE-2026-48210

Summary

An improper default configuration in OTRS 2026.3.1 causes ticket article forwarding actions to enforce the “Is visible for customer” flag by default and prevent users from disabling it via the UI. This leads to unintended exposure of internal ticket information to the External Frontend

This issue affects OTRS 2026.3.1

Affected Software

Weaknesses

• CWE-200: CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
• CWE-269: CWE-269 Improper Privilege Management

Workarounds

Go to Forms###AgentFrontend::TicketArticle::Action::Forward in System Configuration. You will find that by Is visible for customer is a line Disabled: 1. Change it to Disabled to 0 or remove it. 

Caution: Still the user has to check the checkbox on forwarding and uncheck it if needed

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

References

• https://otrs.com/release-notes/otrs-security-advisory-2026-09/

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