CVE-2020-35870 is a critical-severity (CVSS 9.8) Use After Free vulnerability in rusqlite. A fix is available for rusqlite — see the affected versions and patch details below.
Data races in rusqlite
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
rusqliteReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects crates.io packages — download data is not available via public APIs for these ecosystems.
Description
An issue was discovered in the rusqlite crate before 0.23.0 for Rust. Memory safety can be violated via an Auxdata API use-after-free.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🦀crates.io | rusqlite | all versions | 0.23.0cargo update -p rusqlite --precise 0.23.0 |
Affected Products
rusqliterusqlite_projectDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for rusqlite, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update rusqlite to 0.23.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2020-35870 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
Is CVE-2020-35870 in your dependencies?
Find it across crates.io, including transitive dependencies.