How severe is GHSA-g64q-3vg8-8f93?

No CVSS score has been assigned to GHSA-g64q-3vg8-8f93 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-g64q-3vg8-8f93?

GHSA-g64q-3vg8-8f93 affects the following packages: pez (npm). Ecosystems affected: npm.

How do I fix GHSA-g64q-3vg8-8f93?

No patched version of pez has shipped for GHSA-g64q-3vg8-8f93 yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.

How do I detect GHSA-g64q-3vg8-8f93 in my npm dependencies?

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

How do I mitigate GHSA-g64q-3vg8-8f93 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-g64q-3vg8-8f93 actively exploited in the wild?

No public exploit code has been indexed for GHSA-g64q-3vg8-8f93 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-g64q-3vg8-8f93 published, and has it been updated?

GHSA-g64q-3vg8-8f93 was published on September 3, 2020 and was last updated on September 30, 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

Prototype Pollution in pezGHSA-g64q-3vg8-8f93

GHSA-g64q-3vg8-8f93 is a security vulnerability in pez. No vendor fix is recorded yet; mitigation options are listed below.

Published

Sep 3, 2020

Updated

Sep 30, 2025

Affected

1 pkg

Patched

None yet

Exploits

None indexed

Exploitation data as of Sep 30, 2025 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, a proxy for how much of the ecosystem is exposed.

peznpm

63Kdownloads / week

Description

All versions of pez are vulnerable to Prototype Pollution. A multipart payload can be constructed in a way that one of the parts’ content can be set as the entire payload object’s prototype. If this prototype contains data, it may bypass other validation rules which enforce access and privacy. If this prototype evaluates to null, it can cause unhandled exceptions when the request payload is accessed.

Recommendation

This package is deprecated and is now maintained as @hapi/pez. Please update your dependencies to use @hapi/pez.

Affected Packages

1 total

Ecosystem	Package	Vulnerable range	Fix
📦npm	`pez`	≥ 0.0.0	No fix

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for pez, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Remediation status
No patched version of pez has shipped for GHSA-g64q-3vg8-8f93 yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.
Mitigate without a patch
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

All versions of `pez` are vulnerable to Prototype Pollution. A multipart payload can be constructed in a way that one of the parts’ content can be set as the entire payload object’s prototype. If this prototype contains data, it may bypass other validation rules which enforce access and privacy. If this prototype evaluates to null, it can cause unhandled exceptions when the request payload is accessed. ## Recommendation This package is deprecated and is now maintained as `@hapi/pez`. Please update your dependencies to use `@hapi/pez`.

O3 Security · Impact-Aware SCA

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