CVE-2026-48210
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedAn 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
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceOTRS 2026.3.1 has an improper default configuration where ticket article forwarding actions forcibly enable the IsVisibleForCustomer flag and block UI controls from disabling it, causing internal ticket content to be exposed to external customers.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data= 2026.3.1CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- Low
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Verify OTRS installation versionCheck the installed OTRS version by examining the version file (e.g., OTRS/VERSION file in the installation directory) or by accessing the admin panel's system information pageAffected if The installed version is exactly 2026.3.1
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Confirm External Frontend is enabledInspect the OTRS system configuration (Config.pm or admin interface) for the CustomerFrontend::Enabled setting under the Customer moduleAffected if The Customer/External Frontend is enabled and accessible to external customers
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Check default visibility setting for article forwardingExamine the OTRS system configuration for the Ticket::Frontend::AgentTicketForward###IsVisibleForCustomer setting or similar configuration key governing the default state of the visibility flag during article forwardingAffected if The configuration enforces IsVisibleForCustomer=true as the default or prevents users from unchecking it during forwarding
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Identify forwarded articles with customer visibilityQuery the article database table (article) or use the admin interface to list ticket articles created via the Forward action, checking those where the customer_visible flag is setAffected if There exist forwarded articles with the IsVisibleForCustomer flag enabled that contain internal information
You are affected if you run OTRS 2026.3.1 with the External Frontend enabled and have forwarded ticket articles where internal information may be exposed to customers.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataModify the OTRS default configuration to allow users to control the IsVisibleForCustomer flag via the UI, or adjust the default setting to not enforce visibility for forwarded articles.
- Consultation2.0 h
- Implementation2.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-48210 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-48210 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Version or environment caveats, and links to real fixes
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