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Not in CISA KEV
MEDIUM severity

CVE-2026-35363 — uu_rm

MEDIUM

CVE-2026-35363 is a medium-severity (CVSS 5.6) Path Traversal vulnerability in uu_rm. A fix is available for uu_rm — see the affected versions and patch details below.

rm: 'rm -rf ./' (and ./// variants) silently deletes current directory contents, bypassing dot protection

Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Oct 3, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

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-2026-35363.

EPSS Exploitation Probability

via FIRST.org ↗
0.2%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs6th percentile — riskier than 6% of all scored CVEsHighest risk
0.00%0.22%0.45%0.67%0.0%0.2%0.2%May 26Oct 26Oct 26

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

How urgent is this, really

CVE-2026-35363 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

1 pkg affected
🦀uu_rm

Real-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

rm -rf . is correctly refused, but clean_trailing_slashes normalizes ./// to ./ while path_is_current_or_parent_directory only matches ./.. (and /.//..), not ./ or ../. So rm -rf ./ recursively deletes the directory's contents and then prints a misleading cannot remove './': Invalid input.

Impact: all files/subdirectories in the current directory are silently deleted; the misleading error makes users miss the recovery window. Recommendation: handle trailing-slash variants in path_is_current_or_parent_directory.

Remediation: Acknowledged by Canonical; fixed in commit d0e5af23.

Reported by Zellic in the uutils coreutils Program Security Assessment (prepared for Canonical, Jan 20 2026), audited commit 3a07ffc5a9bd4c283e75afa548ba1f1957bad242. Finding 3.60. Credit: Zellic.

Upstream tracking issue: https://github.com/uutils/coreutils/issues/9749 · CVE-2026-35363

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🦀crates.iouu_rmall versions0.6.0cargo update -p uu_rm --precise 0.6.0

Affected Products

1 product · 1 configurations
Application
coreutilsuutils
all

Detection & mitigation playbook

Open-source dependency

  1. Detect

    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.

  2. Fix

    Update uu_rm to 0.6.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-35363 is resolved across your whole dependency graph.

  3. Workarounds

    Resolve every user-supplied path to its canonical form and reject anything that escapes the intended directory, and run the component under an account that has no read or write access outside the directory it legitimately serves.

Frequently Asked Questions

`rm -rf .` is correctly refused, but `clean_trailing_slashes` normalizes `.///` to `./` while `path_is_current_or_parent_directory` only matches `.`/`..` (and `/.`/`/..`), not `./` or `../`. So `rm -rf ./` recursively deletes the directory's contents and then prints a misleading `cannot remove './': Invalid input`. **Impact:** all files/subdirectories in the current directory are silently deleted; the misleading error makes users miss the recovery window. Recommendation: handle trailing-slash variants in `path_is_current_or_parent_directory`. **Remediation:** Acknowledged by Canonical; fixed
O3 Security · Impact-Aware SCA

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CVE-2026-35363: uu_rm — Fixed in 0.6.0 | O3 Security