GHSA-xjw3-5r5c-m5ph — typo3/swiftmailer
GHSA-xjw3-5r5c-m5ph is a remote code execution vulnerability in typo3/swiftmailer. A fix is available for typo3/swiftmailer — see the affected versions and patch details below.
typo3 Security fix for Flow Swift Mailer package
Real-World Exposure
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 | 4.1.99composer require typo3/swiftmailer:^4.1.99 |
| 🐘Packagist | typo3/swiftmailer | ≥ 5.4.0&&< 5.4.5 | 5.4.5composer require typo3/swiftmailer:^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, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
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 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-xjw3-5r5c-m5ph can be triaged on real exposure rather than presence alone.
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 Security finds GHSA-xjw3-5r5c-m5ph across Packagist dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.