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CVE-2026-111622— smart-sso through 2.1.1 OAuth2 Authorization Code Theft via Unvalidated redirectUri

Quick assessment

Affected
a466350665 smart-sso
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

smart-sso 2.1.1 及以下版本在 处理程序中存在开放重定向漏洞。该漏洞允许未认证的攻击者通过提供未经验证的 参数，窃取 OAuth2 授权码。攻击者可以向拥有活跃 SSO 会话的用户发送精心构造的 链接，随后使用任何有效的客户端凭证在 接口兑换被窃取的授权码，从而获取受害者的访问令牌。

CVSS 6.8 · Medium

Affected Version Matrix 1

VendorProduct Version RangeStatus
a466350665 smart-sso ≤ 2.1.1 affected
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I. Basic Information for CVE-2026-111622

Vulnerability Information
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Vulnerability Title
smart-sso through 2.1.1 OAuth2 Authorization Code Theft via Unvalidated redirectUri
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
a466350665 smart-sso 0 ~ 2.1.1 -

II. Public POCs for CVE-2026-111622

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-111622

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Vendor Advisories for CVE-2026-111622 (1)

Proof of Concept for CVE-2026-111622 (1)

Security Blog Posts for CVE-2026-111622 (1)

Other References for CVE-2026-111622 (2)

IV. Related Vulnerabilities

Same product: smart-sso
Same vendor: a466350665
Same weakness: CWE-601

V. Comments for CVE-2026-111622

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