GHSA-3jch-9qgp-4844 is a critical-severity (CVSS 9.8) vulnerability in flatbuffers. A fix is available for flatbuffers — see the affected versions and patch details below.
Generated code can read and write out of bounds in safe code
Real-World Exposure
flatbuffersReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects crates.io packages — download data is not available via public APIs for these ecosystems.
Description
Code generated by flatbuffers' compiler is unsafe but not marked as such.
See https://github.com/google/flatbuffers/issues/6627 for details.
All users that use generated code by flatbuffers compiler are recommended to:
- not expose flatbuffer generated code as part of their public APIs
- audit their code and look for any usage of
follow,push, or any method that uses them (e.g.self_follow). - Carefuly go through the crates' documentation to understand which "safe" APIs are not intended to be used.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🦀crates.io | flatbuffers | all versions | 22.9.29cargo update -p flatbuffers --precise 22.9.29 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for flatbuffers, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update flatbuffers to 22.9.29 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-3jch-9qgp-4844 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-3jch-9qgp-4844 can be triaged on real exposure rather than presence alone.
Tailored to GHSA-3jch-9qgp-4844. 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-3jch-9qgp-4844 in your dependencies?
O3 Security finds GHSA-3jch-9qgp-4844 across crates.io dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.