vulnerability / NVI-00018581 / Revision 1
Nodemailer jsonTransport bypasses disableFileAccess and disableUrlAccess during message normalization
GitHub lists this reviewed advisory for nodemailer. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.
This report has not inspected your inventory, configuration, deployed build, reachability or evidence. A catalog listing and a severity score do not establish exposure or compromise.
01 / Meaning
Why it matters
Published affected context helps an owner decide what evidence to gather. This report has not examined your application.
5.4 medium
GitHub source severity; exploitability and local consequence require separate evidence.
As of · GitHub Advisory Database
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
nodemailer
source listed<= 8.0.8
### Summary Nodemailer's `disableFileAccess` and `disableUrlAccess` options are intended to prevent message content and attachments from reading local files or fetching URLs. The normal MIME streaming path enforces those options in `MimeNode._getStream()`. However, `jsonTransport` serializes messages by calling `mail.normalize()`, which resolves `html`, `text`, alternatives, calendar events, and attachments through `shared.resolveContent()` before MIME generation. `shared.resolveContent()` reads local files and fetches HTTP(S) URLs directly, without receiving or checking `disableFileAccess` or `disableUrlAccess`. As a result, applications that use `jsonTransport` as a safe serializer or queue payload generator while relying on `disableFileAccess` / `disableUrlAccess` can still be made to read local files into the generated JSON output or make outbound HTTP requests when an attacker controls message content fields such as attachment `path` or `text.href`. The same missing-enforcement root cause is also reachable before normal streaming when `attachDataUrls` causes `_convertDataImages()` to call `mail.resolveContent(mail.data, 'html', ...)`; this should be fixed with the same acce
03 / Response
What to do next
- investigate
Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database
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04 / Limits
What this report cannot establish
- Customer inventory, deployment, reachability and exploitation have not been inspected.
05 / Provenance
Sources you can inspect
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- GHSA-wqvq-jvpq-h66f ↗
GitHub Advisory Database · vendor advisory
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Public revision history
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- Revision 1 ·
First indexed by Null; source disclosure date is shown separately.