## fix(security): bump nodemailer to 9.0.1 (raw-option SSRF / file read)
Resolves [Dependabot Alert
#1518](https://github.com/twentyhq/twenty/security/dependabot/1518) and
[#1519](https://github.com/twentyhq/twenty/security/dependabot/1519).
### What
`nodemailer` `<= 9.0.0` lets the message-level `raw` option bypass
`disableFileAccess`/`disableUrlAccess`, enabling **arbitrary file read**
and **full-response SSRF** in the delivered message ([GHSA
advisory](https://github.com/twentyhq/twenty/security/dependabot/1518),
High). Patched in `9.0.1`.
### How — direct bump, no resolution
- **twenty-server:** `nodemailer ^8.0.5 -> ^9.0.1` (major bump).
- **seed-dependencies:** the application-package template `nodemailer
^8.0.5 -> ^9.0.1`; both `DEFAULT_PACKAGE_JSON_CHECKSUM` and
`DEFAULT_YARN_LOCK_CHECKSUM` regenerated to match the recomputed seed
files (the deps-layer cache key).
### Compatibility — verified nothing breaks
It is a major upgrade, so the 9.0 breaking change was checked against
the current tree. The only behavior change is **stricter TLS validation
when nodemailer fetches remote content** (attachment `href`/`path` URLs,
built-in OAuth2 token endpoints, HTTP/HTTPS proxy `CONNECT`). None of
those paths are reachable here:
- Attachments are passed as **content buffers**, never `path`/`href`.
- Gmail OAuth uses **googleapis**, not nodemailer's built-in OAuth2.
- No proxy on any transport.
- The SMTP socket TLS is governed separately (unchanged).
Verification: `typecheck twenty-server` passes (with `@types/nodemailer
^7.0.3`), and the `email-sender`, `gmail-message-outbound`, and
`imap-smtp-caldav-connection` suites pass (10 tests).
### Not covered (follow-up)
Root alert **#1521** will stay open: `imapflow@1.3.6` exact-pins
`nodemailer@8.0.10`. The clean fix is `imapflow 1.4.2` (which pins
nodemailer `9.0.1`), but it published 2026-06-19 and is **age-gated
until ~2026-06-22** — it will land then as a parent-bump (no
resolution).
### Verification
- `nodemailer` resolves to `9.0.1` for twenty-server; seed lockfile has
`9.0.1`; both seed checksums match the canonical recompute.
- `yarn install --immutable` passes.
Abdullah.
d74b6aeadf