Description
smart-sso through 2.1.1 contains an open redirect vulnerability in the /login handler that allows unauthenticated attackers to steal OAuth2 authorization codes by supplying an unvalidated redirectUri parameter. Attackers can send crafted /login links to users with active SSO sessions, then redeem stolen codes at /oauth2/access_token with any valid client credentials to obtain victims' access tokens.
Published: 2026-10-16
Score: 7.6 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Fri, 16 Oct 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Fri, 16 Oct 2026 17:45:00 +0000

Type Values Removed Values Added
Description smart-sso through 2.1.1 contains an open redirect vulnerability in the /login handler that allows unauthenticated attackers to steal OAuth2 authorization codes by supplying an unvalidated redirectUri parameter. Attackers can send crafted /login links to users with active SSO sessions, then redeem stolen codes at /oauth2/access_token with any valid client credentials to obtain victims' access tokens.
Title smart-sso through 2.1.1 OAuth2 Authorization Code Theft via Unvalidated redirectUri
First Time appeared A466350665
A466350665 smart-sso
Weaknesses CWE-601
CPEs cpe:2.3:a:a466350665:smart-sso:*:*:*:*:*:*:*:*
Vendors & Products A466350665
A466350665 smart-sso
References
Metrics cvssV3_1

{'score': 6.8, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N'}

cvssV4_0

{'score': 7.6, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N'}

Subscriptions

A466350665 Smart-sso
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-16T19:29:48.555Z

Reserved: 2026-10-16T14:31:11.006Z

Link: CVE-2026-111622

cve-icon Vulnrichment

Updated: 2026-10-16T19:29:41.821Z

cve-icon NVD

Status : Deferred

Published: 2026-10-16T18:17:41.980

Modified: 2026-10-16T20:17:20.827

Link: CVE-2026-111622

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-16T19:30:13Z

Weaknesses
  • CWE-601

    URL Redirection to Untrusted Site ('Open Redirect')