Information disclosure in Ruby Uri
CVE-2025-61594
URI is a module providing classes to handle Uniform Resource Identifiers. In versions 0.12.4 and earlier (bundled in Ruby 3.2 series) 0.13.2 and earlier (bundled in Ruby 3.3 series), 1.0.3 and earlier (bundled in Ruby 3.4 series), when using the + operator to combine URIs, sensitive information like passwords from the original URI can be leaked, violating RFC3986 and making applications vulnerable to credential exposure. This is a a bypass for the fix to CVE-2025-27221 that can expose user credentials. This issue has been fixed in versions 0.12.5, 0.13.3 and 1.0.4.
Vulnerability class: Information Disclosure
EPSS: 0.005 (40.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Ruby Uri — versions < 0.12.5, >= 0.13.0, < 0.13.3, >= 1.0.0, < 1.0.4
- Ruby-lang Uri
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2025-61594?
- CVE-2025-61594 is a high-severity vulnerability in Ruby Uri, classified under Information Disclosure. CVSS score: 7.5/10. Published 2025-12-30.
- How severe is CVE-2025-61594?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2025-61594 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.