How severe is GHSA-6476-g47x-h3c7?

GHSA-6476-g47x-h3c7 has a CVSS score of 7.5/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by GHSA-6476-g47x-h3c7?

GHSA-6476-g47x-h3c7 affects the following packages: pyfribidi (PyPI). Ecosystems affected: PyPI.

How do I fix GHSA-6476-g47x-h3c7?

Update pyfribidi to 0.11.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-6476-g47x-h3c7 is resolved across your whole dependency graph.

How do I detect GHSA-6476-g47x-h3c7 in my PyPI dependencies?

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

How do I mitigate GHSA-6476-g47x-h3c7 if there is no patch (or I can't update yet)?

Constrain what reaches the vulnerable code: limit the size and shape of untrusted input, isolate the affected component in a sandboxed or least-privileged process, and enable the platform's memory-safety mitigations (ASLR, stack protector, hardened allocator) so an out-of-bounds access is more likely to fail closed than to be exploitable.

Is GHSA-6476-g47x-h3c7 actively exploited in the wild?

No public exploit code has been indexed for GHSA-6476-g47x-h3c7 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-6476-g47x-h3c7?

GHSA-6476-g47x-h3c7 has an EPSS (Exploit Prediction Scoring System) score of 2.7%, placing it in the 86th 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.

What type of vulnerability is GHSA-6476-g47x-h3c7?

GHSA-6476-g47x-h3c7 is classified as Buffer Overflow (CWE-119). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was GHSA-6476-g47x-h3c7 published, and has it been updated?

GHSA-6476-g47x-h3c7 was published on May 17, 2022 and was last updated on October 21, 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

PyFriBidi Buffer overflow in the fribidi_utf8_to_unicode functionGHSA-6476-g47x-h3c7

HIGHFix: pediapress/pyfribidi@d2860c6

GHSA-6476-g47x-h3c7 is a high-severity (CVSS 7.5) Buffer Overflow vulnerability in pyfribidi. A fix is available for pyfribidi — see the affected versions and patch details below.

Also known asCVE-2012-1176PYSEC-2012-11

Published

May 17, 2022

Updated

Oct 21, 2024

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Nov 5, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

2.7%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs86th percentile — riskier than 86% of all scored CVEsHighest risk

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

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected

🐍pyfribidi

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

Buffer overflow in the fribidi_utf8_to_unicode function in PyFriBidi before 0.11.0 allows remote attackers to cause a denial of service (application crash) via a 4-byte utf-8 sequence.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐍PyPI	`pyfribidi`	all versions	0.11.0`pip install --upgrade 'pyfribidi==0.11.0'`

Affected Products

1 product · 1 configurations

Application

pyfribidifribidi

≤ 0.10.9

range

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for pyfribidi, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update pyfribidi to 0.11.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-6476-g47x-h3c7 is resolved across your whole dependency graph.
Workarounds
Constrain what reaches the vulnerable code: limit the size and shape of untrusted input, isolate the affected component in a sandboxed or least-privileged process, and enable the platform's memory-safety mitigations (ASLR, stack protector, hardened allocator) so an out-of-bounds access is more likely to fail closed than to be exploitable.

Frequently Asked Questions

Buffer overflow in the fribidi_utf8_to_unicode function in PyFriBidi before 0.11.0 allows remote attackers to cause a denial of service (application crash) via a 4-byte utf-8 sequence.

O3 Security · Impact-Aware SCA

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