SSRF in Ruby-Oauth Oauth
CVE-2026-54605
OAuth is a Ruby wrapper for the OAuth 1.0 and 1.0a protocols, providing clients and servers. From 0.5.5 to 1.1.5, OAuth::Consumer#token_request parses the raw Location header of a 300 to 399 redirect returned by the OAuth server and follows the redirect recursively, which can mutate the consumer's configuration and expose signed OAuth request metadata, including the Authorization header, to a cross-origin host. This issue is fixed in version 1.1.6.
Vulnerability class: Information Disclosure
EPSS: 0.001 (3.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.
Affected products
- Ruby-oauth Oauth — versions >= 0.5.5, < 1.1.6
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-54605?
- CVE-2026-54605 is a high-severity vulnerability in Ruby-Oauth Oauth, classified under Information Disclosure. CVSS score: 7.2/10. Published 2026-07-28.
- How severe is CVE-2026-54605?
- High severity. CVSS v3 base score is 7.2 out of 10.