How severe is GHSA-r478-c2pc-m7gx?

GHSA-r478-c2pc-m7gx has a CVSS score of 7.5/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by GHSA-r478-c2pc-m7gx?

GHSA-r478-c2pc-m7gx affects the following packages: dnslib (PyPI). Ecosystems affected: PyPI.

How do I fix GHSA-r478-c2pc-m7gx?

Update dnslib to 0.9.17 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-r478-c2pc-m7gx is resolved across your whole dependency graph.

How do I detect GHSA-r478-c2pc-m7gx in my PyPI dependencies?

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

How do I mitigate GHSA-r478-c2pc-m7gx 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-r478-c2pc-m7gx actively exploited in the wild?

No public exploit code has been indexed for GHSA-r478-c2pc-m7gx 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.

What is the EPSS score for GHSA-r478-c2pc-m7gx?

GHSA-r478-c2pc-m7gx has an EPSS (Exploit Prediction Scoring System) score of 0.8%, placing it in the 57th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

When was GHSA-r478-c2pc-m7gx published, and has it been updated?

GHSA-r478-c2pc-m7gx was published on January 12, 2022 and was last updated on September 18, 2024. 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

HIGH severity

dnslib has DNS reply verification issueGHSA-r478-c2pc-m7gx

HIGHFix: paulc/dnslib@76e8677

GHSA-r478-c2pc-m7gx is a high-severity (CVSS 7.5) vulnerability in dnslib. A fix is available for dnslib — see the affected versions and patch details below.

Also known asCVE-2022-22846PYSEC-2022-4

Published

Jan 12, 2022

Updated

Sep 18, 2024

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Oct 9, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

0.8%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs57th percentile — riskier than 57% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

GHSA-r478-c2pc-m7gx by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,987 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

1 pkg affected

🐍dnslib

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

The dnslib package through 0.9.16 for Python does not verify that the ID value in a DNS reply matches an ID value in a query.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐍PyPI	`dnslib`	all versions	0.9.17`pip install --upgrade 'dnslib==0.9.17'`

Affected Products

1 product · 1 configurations

Application

dnslibdnslib_project

≤ 0.9.16

range

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for dnslib, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update dnslib to 0.9.17 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-r478-c2pc-m7gx 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

The dnslib package through 0.9.16 for Python does not verify that the ID value in a DNS reply matches an ID value in a query.

O3 Security · Impact-Aware SCA

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