Path traversal in Rack

1) Path traversal

EUVDB-ID: #VU105796

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2025-27610

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences in Rack::Static. A remote attacker can read arbitrary files on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Rack: 2.2.0 - 3.1.11

CPE2.3

• cpe:2.3:a:rack:rack:2.2.12:*:*:*:*:ruby:*:*
• cpe:2.3:a:rack:rack:3.0.13:*:*:*:*:ruby:*:*
• cpe:2.3:a:rack:rack:3.1.11:*:*:*:*:ruby:*:*

External links

https://github.com/rack/rack/commit/50caab74fa01ee8f5dbdee7bb2782126d20c6583
https://github.com/rack/rack/security/advisories/GHSA-7wqh-767x-r66v

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.