Remote Memory Exposure in mongooseGHSA-r5xw-q988-826m
MEDIUMGHSA-r5xw-q988-826m is a medium-severity (CVSS 5.1) vulnerability in mongoose. A fix is available for mongoose — see the affected versions and patch details below.
Real-World Exposure
How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.
mongoosenpmDescription
Versions of mongoose before 4.3.6, 3.8.39 are vulnerable to remote memory exposure.
Trying to save a number to a field of type Buffer on the affected mongoose versions allocates a chunk of uninitialized memory and stores it in the database.
Recommendation
Update to version 4.3.6, 3.8.39 or later.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | mongoose | ≥ 3.5.5&&< 3.8.39 | 3.8.39npm install mongoose@3.8.39 |
| 📦npm | mongoose | ≥ 4.0.0&&< 4.3.6 | 4.3.6npm install mongoose@4.3.6 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for mongoose, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update mongoose to 3.8.39 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-r5xw-q988-826m 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-r5xw-q988-826m in your dependencies?
Find it across npm, including transitive dependencies.