How severe is CVE-2025-61594?

CVE-2025-61594 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2025-61594 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-61594?

CVE-2025-61594 affects Ruby-lang Uri. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-61594?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-61594 have an EU (EUVD) identifier?

Yes. CVE-2025-61594 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-205858.

When was CVE-2025-61594 published?

CVE-2025-61594 was published on 2025-12-30 and last updated on 2026-06-17.

CVE-2025-61594

CVE-2025-61594 is a high-severity vulnerability in Ruby-lang Uri with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-200.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 2.1
EPSS exploit prediction: 1% (40th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-205858
Weakness: CWE-200
Affected product: Ruby-lang Uri
Published: 2025-12-30
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2025-61594?: CVE-2025-61594 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2025-61594 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-61594?: CVE-2025-61594 affects Ruby-lang Uri. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-61594?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-61594 have an EU (EUVD) identifier?: Yes. CVE-2025-61594 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-205858.
When was CVE-2025-61594 published?: CVE-2025-61594 was published on 2025-12-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:ruby-lang:uri:*:*:*:*:*:ruby:*:*

More vulnerabilities in Ruby-lang Uri

CVE-2023-36617 — Medium (CVSS 5.3): A ReDoS issue was discovered in the URI component before 0.12.2 for Ruby. The URI parser mishandles invalid URLs that…
CVE-2023-28755 — Medium (CVSS 5.3): A ReDoS issue was discovered in the URI component through 0.12.0 in Ruby through 3.2.1. The URI parser mishandles…
CVE-2025-27221 — Low (CVSS 3.2): In the URI gem before 1.0.3 for Ruby, the URI handling methods (URI.join, URI#merge, URI#+) have an inadvertent leakage…

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