GHSA-w98g-5fmx-wm4x is a medium-severity (CVSS 5.3) vulnerability in pocketmine/raklib. A fix is available for pocketmine/raklib — see the affected versions and patch details below.
pocketmine/raklib reliable-ordered queue size is unlimited, allowing a session to hog server memory
Real-World Exposure
pocketmine/raklib🐘pocketmine/raklibReal-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
Impact
A client can send reliable-ordered packets 0, 2, 3, 4, 5 ... etc, and all the packets 2 and up will stay in the reliable-ordered queue until 1 arrives. A malicious client can exploit this to waste all available server memory by simply never sending the missing packet. Since the server doesn't make any effort to limit the size of the queue or detect this kind of abuse, this problem is easy to abuse.
Patches
This bug was fixed on the 0.14.x and 0.15.x release lines by 371190f5854372154d1b263cd2a10e658e92bebe.
Workarounds
No workaround is known.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | pocketmine/raklib | ≥ 0.14.0&&< 0.14.6 | 0.14.6composer require pocketmine/raklib:^0.14.6 |
| 🐘Packagist | pocketmine/raklib | ≥ 0.15.0&&< 0.15.1 | 0.15.1composer require pocketmine/raklib:^0.15.1 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for pocketmine/raklib, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update pocketmine/raklib to 0.14.6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-w98g-5fmx-wm4x 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-w98g-5fmx-wm4x can be triaged on real exposure rather than presence alone.
Tailored to GHSA-w98g-5fmx-wm4x. 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-w98g-5fmx-wm4x in your dependencies?
O3 Security finds GHSA-w98g-5fmx-wm4x across Packagist dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.