Open redirect in smart-sso lets attackers steal OAuth2 codes
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Passive
- Attack complexity
- High
- Attack requirements
- Present
- Impact type
- Spoofing
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-601.
Summary
smart-sso through 2.1.1 contains an open redirect in its /login handler (CWE-601). An unauthenticated remote attacker can send crafted /login links with an unvalidated redirectUri to users who have active SSO sessions, which leaks their OAuth2 authorization codes. The attacker then redeems the stolen codes with any valid client credentials to obtain the victims' access tokens.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Description from the CNA
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| a466350665 | smart-sso | up to 2.1.1 | — | No fix listed | CNA |
- smart-sso Vendora466350665 Affected up to 2.1.1 Fixed in — No fix listed CNA
Remediation
The sources list no fixed version for smart-sso.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Timeline
- 2026-10-16 Threatist record created from CVE-2026-111622
- 2026-10-16 Alias added: GHSA-7rfc-8j8f-xgwj
- 2026-10-18 CISA SSVC decision points changed
- 2026-10-18 Priority changed: MEDIUM → HIGH
References
Other 4
- https://github.com/a466350665/smart-sso/blob/2.1.1/smart-sso-server/src/main/java/com/smart/sso/server/controller/LoginController.java#L53-L63
- https://github.com/a466350665/smart-sso/blob/1.6.0/smart-sso-server/src/main/java/openjoe/smart/sso/server/controller/LoginController.java#L50-L59
- https://github.com/a466350665/smart-sso/blob/1.6.0/smart-sso-server/src/main/java/openjoe/smart/sso/server/controller/Oauth2Controller.java#L55-L84
- https://github.com/a466350665/smart-sso
More a466350665 vulnerabilities
- TI-2026-02563 a466350665 Smart-SSO Login login.html cross site scripting CVSS 4.0MEDIUM 5.3
- TI-2026-02564 a466350665 Smart-SSO Role Edit UserController.java save cross site scripting CVSS 4.0MEDIUM 4.8
- TI-2026-84349 Incorrect authorization in smart-sso PermissionFilter enables admin access CVSS 4.0HIGH 8.7
Sources
- CVE-2026-111622 · CVE Program
- CVE-2026-111622 · NVD
- FIRST EPSS
- GHSA-7rfc-8j8f-xgwj · GitHub Advisory Database · CC BY 4.0
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