How severe is GHSA-94v7-wxj6-r2q5?

No CVSS score has been assigned to GHSA-94v7-wxj6-r2q5 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-94v7-wxj6-r2q5?

GHSA-94v7-wxj6-r2q5 affects the following packages: multicast (PyPI). Ecosystems affected: PyPI.

How do I fix GHSA-94v7-wxj6-r2q5?

Update multicast to 2.0.9a0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-94v7-wxj6-r2q5 is resolved across your whole dependency graph.

How do I detect GHSA-94v7-wxj6-r2q5 in my PyPI dependencies?

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

How do I mitigate GHSA-94v7-wxj6-r2q5 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-94v7-wxj6-r2q5 actively exploited in the wild?

No public exploit code has been indexed for GHSA-94v7-wxj6-r2q5 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-94v7-wxj6-r2q5 published, and has it been updated?

GHSA-94v7-wxj6-r2q5 was published on May 28, 2025 and was last updated on May 28, 2025. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐍 PyPI

Not in CISA KEV

multicast in source builds from vulnerable setuptools dependencyGHSA-94v7-wxj6-r2q5

Fix: reactive-firewall/multicast@c5c7c7d

GHSA-94v7-wxj6-r2q5 is a security vulnerability in multicast. A fix is available for multicast — see the affected versions and patch details below.

Published

May 28, 2025

Updated

May 28, 2025

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of May 28, 2025 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected

🐍multicast

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.

Description

Impact

Some source-builds may be impacted by a CWE-1395 (eg. vulnerable setuptools dependency).
- Multicast prior to v2.0.9a3 on systems with minimal dependancies installed may use setuptools <78.1.1 and thus rely on a compromised dependency. In some cases there is a chance that source-builds would fail due to an exploit of the closely related CVE-2025-47273, or become arbitrarily modified.

Patches

Pre-release version v2.0.9a0 and later resolve the issue by bumping requirements to setuptools>=80.4
- Pre-release version v2.0.9a3 and later are recommended for improved stability over v2.0.9a0

Workarounds

Further hardening in v2.0.9a4+ of the build process in CI builds allowing source builds to be verified via GH attestations.

References

GHSA-5rjg-fvgr-3xxf
pypa/setuptools#4946

Fixes

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐍PyPI	`multicast`	all versions	2.0.9a0`pip install --upgrade 'multicast==2.0.9a0'`

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for multicast, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update multicast to 2.0.9a0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-94v7-wxj6-r2q5 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 * Some source-builds may be impacted by a CWE-1395 (eg. vulnerable `setuptools` dependency). * Multicast prior to v2.0.9a3 on systems with minimal dependancies installed may use `setuptools <78.1.1` and thus rely on a compromised dependency. In some cases there is a chance that source-builds would fail due to an exploit of the closely related CVE-2025-47273, or become arbitrarily modified. ### Patches * Pre-release version v2.0.9a0 and later resolve the issue by bumping requirements to `setuptools>=80.4` * Pre-release version v2.0.9a3 and later are recommended for improved

O3 Security · Impact-Aware SCA

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