EUVD-2026-66978
GHSA-mhfq-9687-g8m3
Severity by source
AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Network-accessible open redirect requiring active victim click (UI:R); scope changes to external attacker site (S:C); no server-side auth needed (PR:N); no availability impact.
Primary rating from Vendor (vmware).
CVSS VectorVendor: vmware
Lifecycle Timeline
2DescriptionCVE.org
In versions of Spring Authorization Server 1.5.0 through 1.5.7, the authorization endpoint performs insufficient validation of the request_uri parameter. An attacker can craft a request containing an invalid request_uri paired with an unvalidated redirect_uri, which can result in an open redirect to an attacker-controlled site.
AnalysisAI
Open redirect in Spring Authorization Server 1.5.0-1.5.7 allows remote unauthenticated attackers to redirect victims to attacker-controlled sites by crafting authorization requests that pair an invalid request_uri with an unvalidated redirect_uri. The CVSS scope change (S:C) reflects that the redirect escapes the authorization server's security boundary, enabling high-trust phishing attacks because victims see the legitimate authorization server domain before being redirected. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The OAuth 2.0 authorization endpoint of Spring Authorization Server must be network-reachable by the attacker, and the server must be running versions 1.5.0 through 1.5.7. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 6.1 (Medium) with vector AV:N/AC:L/PR:N/UI:R/S:C correctly captures a network-exploitable, unauthenticated flaw of low operational complexity, but one gated on user interaction. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade Spring Authorization Server to a version beyond 1.5.7 per the vendor advisory at https://spring.io/security/cve-2026-59355 - the exact fixed version is not specified in available intelligence and must be confirmed directly from the advisory before deployment. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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