CVE-2022-4396 is a low-severity (CVSS 3.5) CWE-707 vulnerability in pyrdfa3. A fix is available for pyrdfa3 — see the affected versions and patch details below.
RDFlib pyrdfa3 __init__.py _get_option cross site scripting
Exploitation Status
No confirmed exploitation observed yet
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2022-4396.
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
How urgent is this, really
CVE-2022-4396 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 377,333 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
Real-World Exposure
pyrdfa3Real-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
A vulnerability was found in RDFlib pyrdfa3 and classified as problematic. This issue affects the function _get_option of the file pyRdfa/init.py. The manipulation leads to cross site scripting. The attack may be initiated remotely. The name of the patch is ffd1d62dd50d5f4190013b39cedcdfbd81f3ce3e. It is recommended to apply a patch to fix this issue. The identifier VDB-215249 was assigned to this vulnerability. NOTE: This vulnerability only affects products that are no longer supported by the maintainer.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | pyrdfa3 | all versions | 3.6.2pip install --upgrade 'pyrdfa3==3.6.2' |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for pyrdfa3, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update pyrdfa3 to 3.6.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2022-4396 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.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2022-4396 can be triaged on real exposure rather than presence alone.
Tailored to CVE-2022-4396. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2022-4396 in your dependencies?
O3 Security finds CVE-2022-4396 across PyPI dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.