Vulnerability-Lookup

GHSA-7RFC-8J8F-XGWJ

Vulnerability from github – Published: 2026-10-16 18:34 – Updated: 2026-10-16 18:34

Details

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.

Severity

6.8 (Medium)


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

7.6 (High)


                  
                    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

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-111622"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-601"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-16T18:17:41Z",
    "severity": "HIGH"
  },
  "details": "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\u0027 access tokens.",
  "id": "GHSA-7rfc-8j8f-xgwj",
  "modified": "2026-10-16T18:34:43Z",
  "published": "2026-10-16T18:34:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-111622"
    },
    {
      "type": "WEB",
      "url": "https://github.com/a466350665/smart-sso"
    },
    {
      "type": "WEB",
      "url": "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"
    },
    {
      "type": "WEB",
      "url": "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"
    },
    {
      "type": "WEB",
      "url": "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"
    },
    {
      "type": "WEB",
      "url": "https://hackmd.io/@hieuPenguinnn/smart-sso-oauth2-code-leak-open-redirect"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/smart-sso-through-2.1.1-oauth2-authorization-code-theft-via-unvalidated-redirecturi"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-111622 (GCVE-0-2026-111622)

Vulnerability from cvelistv5 – Published: 2026-10-16 17:38 – Updated: 2026-10-16 19:29

Title

smart-sso through 2.1.1 OAuth2 Authorization Code Theft via Unvalidated redirectUri

Summary

Severity

7.6 (High)


                        
                          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

6.8 (Medium)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-16 19:29 UTC

CWE

CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')

Assigner

VulnCheck CNA under the mitre root

CNA scorecard B 84/100 over 6430 records in the last 180 days details

References

6 references

URL	Tags
https://hackmd.io/@hieuPenguinnn/smart-sso-oauth2…	third-party-advisory
https://github.com/a466350665/smart-sso/blob/2.1.…	technical-description
https://github.com/a466350665/smart-sso/blob/1.6.…	technical-description
https://github.com/a466350665/smart-sso/blob/1.6.…	technical-description
https://github.com/a466350665/smart-sso	product
https://www.vulncheck.com/advisories/smart-sso-th…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
a466350665	smart-sso	Affected: 0 , ≤ 2.1.1 (custom) cpe:2.3:a:a466350665:smart-sso::::::::

Date Public

2026-10-15 00:00

Credits

hieuPenguinnn

Show details on NVD website

JSON

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        "metrics": [
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                "id": "CVE-2026-111622",
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                  },
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                    "Technical Impact": "total"
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                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-16T19:29:03.823422Z",
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          }
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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