GHSA-xjw3-5r5c-m5ph
GHSA-xjw3-5r5c-m5ph is a remote code execution vulnerability in typo3/swiftmailer. O3 Security confirms whether GHSA-xjw3-5r5c-m5ph is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
typo3 Security fix for Flow Swift Mailer package
Blast Radius
typo3/swiftmailer🐘typo3/swiftmailerReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.
Description
A remote code execution vulnerability has been found in the Swift Mailer library (swiftmailer/swiftmailer) recently. See this advisory for details. If you are not using the default mail() transport, this particular problem does not affect you. Upgrading is of course still recommended!
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | typo3/swiftmailer | ≥ 4.1.0&&< 4.1.99 | 4.1.99 |
| 🐘Packagist | typo3/swiftmailer | ≥ 5.4.0&&< 5.4.5 | 5.4.5 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for typo3/swiftmailer. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update typo3/swiftmailer to 4.1.99 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-xjw3-5r5c-m5ph is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-xjw3-5r5c-m5ph is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-xjw3-5r5c-m5ph. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-xjw3-5r5c-m5ph in your dependencies?
O3 detects GHSA-xjw3-5r5c-m5ph across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.