CVE-2021-28966

7.5 highEPSS 58%

High (7.5) in ruby-lang ruby. EPSS 58% chance of exploitation in the next 30 days. Fixed in tmpdir 0.1.2.

In Ruby through 3.0 on Windows, a remote attacker can submit a crafted path when a Web application handles a parameter with TmpDir.

Severity

7.5 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS: 58% chance of exploitation in the next 30 days; higher than 99% of CVEs (scores of 2026-10-31)
CWE: CWE-22
Published: 2021-07-30
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Advisory	Ecosystem	Package	Affected	Fixed in
GHSA-46f2-3v63-3xrp	RubyGems	tmpdir	<0.1.2	0.1.2