CVE-2026-35349 is a medium-severity (CVSS 6.7) CWE-59 vulnerability in uu_rm. A fix is available for uu_rm — see the affected versions and patch details below.
uutils coreutils Path-Based Safety Bypass with --preserve-root
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-2026-35349.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
CVE-2026-35349 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.
Where this sits among everything scored
Of 382,574 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.
Real-World Exposure
uu_rmReal-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
The --preserve-root check uses a path-string test (path.has_root() && path.parent().is_none()) rather than comparing device/inode. A symlink to / (e.g. /tmp/rootlink -> /) has a parent component, so it passes the check. GNU caches /'s dev/inode at startup and compares every traversed directory against it.
Impact: rm -rf --preserve-root on a path that resolves through a symlink to / bypasses protection and can delete system directories. Recommendation: compare each entered directory's dev/inode against cached /.
Remediation: Acknowledged by Canonical; fixed in commit 5e5968cd.
Reported by Zellic in the uutils coreutils Program Security Assessment (prepared for Canonical, Jan 20 2026), audited commit 3a07ffc5a9bd4c283e75afa548ba1f1957bad242. Finding 3.44. Credit: Zellic.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🦀crates.io | uu_rm | all versions | 0.7.0cargo update -p uu_rm --precise 0.7.0 |
Affected Products
coreutilsuutilsDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for uu_rm, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update uu_rm to 0.7.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-35349 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-2026-35349 in your dependencies?
Find it across crates.io, including transitive dependencies.