CVE-2025-46551

Description

JRuby-OpenSSL is an add-on gem for JRuby that emulates the Ruby OpenSSL native library. Starting in JRuby-OpenSSL version 0.12.1 and prior to version 0.15.4 (corresponding to JRuby versions starting in 9.3.4.0 prior to 9.4.12.1 and 10.0.0.0 prior to 10.0.0.1), when verifying SSL certificates, JRuby-OpenSSL does not verify that the hostname presented in the certificate matches the one the user tries to connect to. This means a man-in-the-middle could just present any valid cert for a completely different domain they own, and JRuby would accept the cert. Anybody using JRuby to make requests of external APIs, or scraping the web, that depends on https to connect securely. JRuby-OpenSSL version 0.15.4 contains a fix for the issue. This fix is included in JRuby versions 10.0.0.1 and 9.4.12.1.

CVSS v3.1 Score

3.7

LOW

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

Weakness Type (CWE)

CWE-295 CWE-295

Affected Products

Vendor	Product	Versions
jruby	jruby	9.3.4.0 — 9.4.12.1
jruby	jruby	All
jruby	jruby-openssl	0.12.1 — 0.15.4

References

Advisories & Patches

https://github.com/jruby/jruby-openssl/commit/31a56d690ce9b8af47af09aaaf809081949ed285 https://github.com/jruby/jruby-openssl/security/advisories/GHSA-72qj-48g4-5xgx https://github.com/jruby/jruby-openssl/security/advisories/GHSA-72qj-48g4-5xgx

Exploits

https://github.com/jruby/jruby-openssl/security/advisories/GHSA-72qj-48g4-5xgx https://github.com/jruby/jruby-openssl/security/advisories/GHSA-72qj-48g4-5xgx

Frequently Asked Questions

What is CVE-2025-46551? +

JRuby-OpenSSL is an add-on gem for JRuby that emulates the Ruby OpenSSL native library. Starting in JRuby-OpenSSL version 0.12.1 and prior to version 0.15.4 (corresponding to JRuby versions starting in 9.3.4.0 prior to 9.4.12.1 and 10.0.0.0 prior to 10.0.0.1), when verifying SSL certificates, JRuby-OpenSSL does not verify that the hostname presented in the certificate matches the one the user tries to connect to. This means a man-in-the-middle could just present any valid cert for a completely different domain they own, and JRuby would accept the cert. Anybody using JRuby to make requests of external APIs, or scraping the web, that depends on https to connect securely. JRuby-OpenSSL version 0.15.4 contains a fix for the issue. This fix is included in JRuby versions 10.0.0.1 and 9.4.12.1. It has a CVSS v3.1 base score of 3.7 (LOW).

How severe is CVE-2025-46551? +

CVE-2025-46551 has a CVSS v3.1 score of 3.7 out of 10, rated LOW. This is a low-severity vulnerability with limited impact.

What products are affected by CVE-2025-46551? +

CVE-2025-46551 affects products from jruby, specifically: jruby, jruby-openssl. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-46551? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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