CVE-2026-50880
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 issue in the sendmail transport integration component of YouTransfer v1.0.6 allows attackers to execute arbitrary code via supplying a crafted request.
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 confidenceYouTransfer v1.0.6 contains a code injection/execution vulnerability in its sendmail transport integration component. Attackers can send crafted requests to this component to achieve arbitrary code execution on the affected system.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS 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
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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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Identify YouTransfer installation and versionCheck the application directory for version information, typically in a version file, package.json, or the main application file. Run: ls -la /path/to/youtransfer/ and look for version indicators.Affected if YouTransfer version 1.0.6 is installed and running
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Locate sendmail transport componentSearch for sendmail-related files in the YouTransfer installation directory. Common paths include: find /path/to/youtransfer -name '*sendmail*' -o -name '*transport*'. Check for modules or plugins related to email transport.Affected if The sendmail transport module exists in the YouTransfer installation
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Verify sendmail transport is enabledExamine YouTransfer configuration files (config.json, settings.json, or similar) for sendmail or transport-related configuration entries. Look for keys such as 'sendmail', 'transport', 'mailer', or 'email'.Affected if Sendmail transport is explicitly enabled in the configuration files
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Check sendmail transport endpoint exposureReview web server configuration or reverse proxy settings for routes exposing the sendmail endpoint. Check if the /sendmail or similar endpoint is publicly accessible without authentication.Affected if The sendmail transport endpoint is accessible from the network without authentication controls
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Review application logs for sendmail exploit attemptsExamine YouTransfer application logs and system logs for unusual sendmail transport activity. Look for: grep -i 'sendmail' /path/to/youtransfer/logs/*.log and check for unexpected or malformed requests.Affected if Logs show suspicious or crafted requests to the sendmail transport endpoint
You are affected if YouTransfer version 1.0.6 is running with the sendmail transport component enabled and accessible.
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 dataUntil an official patch is available, disable or restrict access to the sendmail transport integration component, implement strict input validation/sanitization on all email-related parameters, and consider network segmentation to limit exposure.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-50880 — 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-2026-50880 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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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data