GHSA-3fx4-7f69-5mmg
HIGHGHSA-3fx4-7f69-5mmg is a high-severity (CVSS 7.5) CWE-190 vulnerability in github.com/square/go-jose. O3 Security confirms whether GHSA-3fx4-7f69-5mmg is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Integer Overflow in go-jose
Blast Radius
github.com/square/go-joseReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.
Description
go-jose before 1.0.5 suffers from a CBC-HMAC integer overflow on 32-bit architectures. An integer overflow could lead to authentication bypass for CBC-HMAC encrypted ciphertexts on 32-bit architectures.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/square/go-jose | all versions | 0.0.0-20160903044734-789a4c4bd4c1 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/square/go-jose. 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 github.com/square/go-jose to 0.0.0-20160903044734-789a4c4bd4c1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-3fx4-7f69-5mmg 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-3fx4-7f69-5mmg 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-3fx4-7f69-5mmg. 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-3fx4-7f69-5mmg in your dependencies?
O3 detects GHSA-3fx4-7f69-5mmg across Go dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.