How severe is GHSA-f99h-w337-mv56?

No CVSS score has been assigned to GHSA-f99h-w337-mv56 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-f99h-w337-mv56?

GHSA-f99h-w337-mv56 affects the following packages: github.com/malfunkt/iprange (Go). Ecosystems affected: Go.

How do I fix GHSA-f99h-w337-mv56?

The records we use list no patched version of github.com/malfunkt/iprange for GHSA-f99h-w337-mv56. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.

How do I detect GHSA-f99h-w337-mv56 in my Go dependencies?

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

How do I mitigate GHSA-f99h-w337-mv56 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-f99h-w337-mv56 actively exploited in the wild?

No public exploit code has been indexed for GHSA-f99h-w337-mv56 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-f99h-w337-mv56 published, and has it been updated?

GHSA-f99h-w337-mv56 was published on July 12, 2023 and was last updated on November 8, 2023. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐹 Go

Not in CISA KEV

iprange may panic when parsing ranges with invalid masksGHSA-f99h-w337-mv56

GHSA-f99h-w337-mv56 is a security vulnerability in github.com/malfunkt/iprange. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

Also known asGO-2023-1857

Published

Jul 12, 2023

Updated

Nov 8, 2023

Affected

1 pkg

Patched

None yet

Exploits

None indexed

Exploitation data as of Nov 8, 2023 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected

🐹github.com/malfunkt/iprange

Real-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

Parsing a range with a mask larger than 32 bits causes a panic.

Affected Packages

1 total

Ecosystem	Package	Vulnerable range	Fix
🐹Go	`github.com/malfunkt/iprange`	all versions	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 github.com/malfunkt/iprange, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Remediation status
The records we use list no patched version of github.com/malfunkt/iprange for GHSA-f99h-w337-mv56. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.
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

Parsing a range with a mask larger than 32 bits causes a panic.

O3 Security · Impact-Aware SCA

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