CVE-2015-8747 is a critical-severity (CVSS 10) Improper Input Validation vulnerability in radicale. A fix is available for radicale — see the affected versions and patch details below.
Radicale vulnerable to arbitrary file read or write
EPSS Exploitation Probability
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
radicaleReal-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 multifilesystem storage backend in Radicale before 1.1 allows remote attackers to read or write to arbitrary files via a crafted component name.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | radicale | all versions | 1.1pip install --upgrade 'radicale==1.1' |
Affected Products
radicaleradicaleDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for radicale, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update radicale to 1.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2015-8747 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
Is CVE-2015-8747 in your dependencies?
Find it across PyPI, including transitive dependencies.