What is CVE-2017-8418?

CVE-2017-8418 is a low-severity vulnerability in Rubocop Project, classified under Exposure of Resource to Wrong Sphere. CVSS score: 3.3/10. Published 2017-05-02.

How severe is CVE-2017-8418?

Low severity. CVSS v3 base score is 3.3 out of 10.

Is CVE-2017-8418 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Rubocop Project

CVE-2017-8418

RuboCop 0.48.1 and earlier does not use /tmp in safe way, allowing local users to exploit this to tamper with cache files belonging to other users.

Published 2017-05-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 3.3 (Low). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.004 (32.7th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 32.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Rubocop Project

Weakness classification (CWE)

CWE-668 — Exposure of Resource to Wrong Sphere

Public proof-of-concept exploits

ARPSyndicate/cvemon

References

www.openwall.com/lists/oss-security/2017/05/01/14 (Exploit, Mailing List, Third Party Advisory)
github.com/bbatsov/rubocop/issues/4336 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2017-8418?: CVE-2017-8418 is a low-severity vulnerability in Rubocop Project, classified under Exposure of Resource to Wrong Sphere. CVSS score: 3.3/10. Published 2017-05-02.
How severe is CVE-2017-8418?: Low severity. CVSS v3 base score is 3.3 out of 10.
Is CVE-2017-8418 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.