Vulnerability-Lookup

GHSA-J9PV-5342-RRX5

Vulnerability from github – Published: 2026-08-27 12:30 – Updated: 2026-08-27 12:30

Details

In versions of Spring Security's OAuth2 Authorization Server module 7.0.0 through 7.0.4, when Dynamic Client Registration is explicitly enabled, the registration endpoint performs insufficient validation of certain client metadata fields supplied by the registering client. An attacker who possesses a valid Initial Access Token can register a malicious client with crafted metadata, which, depending on server configuration and how the metadata is later rendered or used, may result in Stored Cross-Site Scripting (XSS), Privilege Escalation, or Server-Side Request Forgery (SSRF).

Severity

6.1 (Medium)


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

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JSON

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  "affected": [],
  "aliases": [
    "CVE-2026-59354"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-20"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-27T10:16:36Z",
    "severity": "MODERATE"
  },
  "details": "In versions of Spring Security\u0027s OAuth2 Authorization Server module 7.0.0 through 7.0.4, when Dynamic Client Registration is explicitly enabled, the registration endpoint performs insufficient validation of certain client metadata fields supplied by the registering client. An attacker who possesses a valid Initial Access Token can register a malicious client with crafted metadata, which, depending on server configuration and how the metadata is later rendered or used, may result in Stored Cross-Site Scripting (XSS), Privilege Escalation, or Server-Side Request Forgery (SSRF).",
  "id": "GHSA-j9pv-5342-rrx5",
  "modified": "2026-08-27T12:30:24Z",
  "published": "2026-08-27T12:30:24Z",
  "references": [
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      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-59354"
    },
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      "url": "https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator?vector=AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N\u0026version=3.1"
    },
    {
      "type": "WEB",
      "url": "https://spring.io/security/cve-2026-59354"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-59354 (GCVE-0-2026-59354)

Vulnerability from cvelistv5 – Published: 2026-08-27 06:33 – Updated: 2026-08-28 03:55

Title

Spring Security OAuth2 Authorization Server: Insufficient validation of Dynamic Client Registration metadata

Summary

Severity

9.6 (Critical)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-27 00:00 UTC

CWE

CWE-20 - Improper Input Validation

Assigner

vmware mitre root

References

2 references

URL	Tags
https://spring.io/security/cve-2026-59354	vendor-advisory
https://nvd.nist.gov/vuln-metrics/cvss/v3-calcula…	technical-description

Impacted products

1 product

Vendor	Product	Version
VMware by Broadcom	Spring Security (OAuth2 Authorization Server module)	Affected: 7.0.0 , ≤ 7.0.4 (semver) Unaffected: 7.0.5 (semver)

Credits

Kelvin Mbogo (@addcontent)

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JSON

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                "timestamp": "2026-08-27T00:00:00+00:00",
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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.

Detection rules are retrieved from Rulezet.

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.

Action not permitted

GHSA-J9PV-5342-RRX5

CVE-2026-59354 (GCVE-0-2026-59354)

Tags

Sightings

Nomenclature