Insecure deserialize Vulnerability in FLOW3GHSA-7h74-7vcw-4mwp
LOWGHSA-7h74-7vcw-4mwp is a low-severity (CVSS 3.7) vulnerability in neos/flow. A fix is available for neos/flow — see the affected versions and patch details below.
Real-World Exposure
neos/flowReal-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
Due to a missing signature (HMAC) for a request argument, an attacker could unserialize arbitrary objects within FLOW3.
To our knowledge it is neither possible to inject code through this vulnerability, nor are there exploitable objects within the FLOW3 Base Distribution. However, there might be exploitable objects within user applications.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | neos/flow | ≥ 1.0.0&&< 1.0.4 | 1.0.4composer require neos/flow:^1.0.4 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for neos/flow, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update neos/flow to 1.0.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-7h74-7vcw-4mwp 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.
Frequently Asked Questions
Is GHSA-7h74-7vcw-4mwp in your dependencies?
Find it across Packagist, including transitive dependencies.