CVE-2025-70887 is a high-severity (CVSS 8.8) Improper Privilege Management vulnerability in signify. A fix is available for signify — see the affected versions and patch details below.
Signify allows a remote attacker to escalate privileges via the signed_data.py and the context.py components
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
signifyReal-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
An issue in ralphje Signify before v.0.9.2 allows a remote attacker to escalate privileges via the signed_data.py and the context.py components
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | signify | all versions | 0.9.2pip install --upgrade 'signify==0.9.2' |
Affected Products
signifyralphjeDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for signify, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update signify to 0.9.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-70887 is resolved across your whole dependency graph.
Workarounds
Close the privilege gap rather than the entry point: audit which accounts, roles and service identities can reach the affected operation, drop the component to the least privilege it actually needs, and review file and directory permissions created by earlier installs — a default left in place is what makes this reachable.
Frequently Asked Questions
Is CVE-2025-70887 in your dependencies?
Find it across PyPI, including transitive dependencies.