GHSA-pv7h-hx5h-mgfj is a high-severity (CVSS 8.1) Deserialization of Untrusted Data vulnerability in com.alibaba:fastjson. 6 public exploit references exist, so weaponization risk is real. O3 Security confirms whether GHSA-pv7h-hx5h-mgfj is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Unsafe deserialization in com.alibaba:fastjson
Real-World Exposure
com.alibaba:fastjsonReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.
Description
The package com.alibaba:fastjson before 1.2.83 is vulnerable to Deserialization of Untrusted Data by bypassing the default autoType shutdown restrictions, which is possible under certain conditions. Exploiting this vulnerability allows attacking remote servers. Workaround: If upgrading is not possible, you can enable safeMode.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | com.alibaba:fastjson | ≥ 1.2.25&&< 1.2.83 | 1.2.83 |
Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
The package com.alibaba:fastjson before 1.2.83 are vulnerable to Deseria…
The package com.alibaba:fastjson before 1.2.83 are vulnerable to Deseria…
The package com.alibaba:fastjson before 1.2.83 are vulnerable to Deseria…
The package com.alibaba:fastjson before 1.2.83 are vulnerable to Deseria…
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for com.alibaba:fastjson. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update com.alibaba:fastjson to 1.2.83 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-pv7h-hx5h-mgfj 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 pinpoints whether GHSA-pv7h-hx5h-mgfj is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-pv7h-hx5h-mgfj. 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-pv7h-hx5h-mgfj in your dependencies?
O3 detects GHSA-pv7h-hx5h-mgfj across Maven dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.