How severe is GHSA-3j63-5h8p-gf7c?

No CVSS score has been assigned to GHSA-3j63-5h8p-gf7c yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-3j63-5h8p-gf7c?

GHSA-3j63-5h8p-gf7c affects the following packages: x402 (npm), x402-next (npm), x402-express (npm), x402-hono (npm). Ecosystems affected: npm.

How do I fix GHSA-3j63-5h8p-gf7c?

Update x402 to 0.5.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-3j63-5h8p-gf7c is resolved across your whole dependency graph.

How do I detect GHSA-3j63-5h8p-gf7c in my npm dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for x402, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate GHSA-3j63-5h8p-gf7c if there is no patch (or I can't update yet)?

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.

Is GHSA-3j63-5h8p-gf7c actively exploited in the wild?

No public exploit code has been indexed for GHSA-3j63-5h8p-gf7c yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

When was GHSA-3j63-5h8p-gf7c published, and has it been updated?

GHSA-3j63-5h8p-gf7c was published on August 20, 2025. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

📦 npm

Not in CISA KEV

x402 SDK vulnerable in outdated versions in resource servers for buildersGHSA-3j63-5h8p-gf7c

GHSA-3j63-5h8p-gf7c is a security vulnerability in x402. A fix is available for x402 — see the affected versions and patch details below.

Published

Aug 20, 2025

Updated

Aug 20, 2025

Affected

4 pkgs

Patched

4 / 4

Exploits

None indexed

Exploitation data as of Aug 20, 2025 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

4 pkgs affected

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.

132other npm packages depend on this — each one inherits the vulnerability until it's patched upstream

x402npm

715Kdownloads / week

x402-nextnpm

2Kdownloads / week

x402-expressnpm

8Kdownloads / week

Description

Impact

There is a security vulnerability in outdated versions of the x402 SDK. This does not directly affect users' keys, smart contracts, or funds.

This primarily impacts builders working on resource servers.

Patches

Please update to the following package versions:

x402 >= 0.5.2
x402-next >= 0.5.2
x402-express >= 0.5.2
x402-hono >= 0.5.2

Affected Packages

4 total 4 fixed

Ecosystem	Package	Vulnerable range	Fix
📦npm	`x402`	all versions	0.5.2`npm install x402@0.5.2`
📦npm	`x402-next`	all versions	0.5.2`npm install x402-next@0.5.2`
📦npm	`x402-express`	all versions	0.5.2`npm install x402-express@0.5.2`
📦npm	`x402-hono`	all versions	0.5.2`npm install x402-hono@0.5.2`

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for x402, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update x402 to 0.5.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-3j63-5h8p-gf7c 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

### Impact There is a security vulnerability in outdated versions of the x402 SDK. This does not directly affect users' keys, smart contracts, or funds. This primarily impacts builders working on resource servers. ### Patches Please update to the following package versions: * x402 >= 0.5.2 * x402-next >= 0.5.2 * x402-express >= 0.5.2 * x402-hono >= 0.5.2

O3 Security · Impact-Aware SCA

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