CVE-2026-23480

Summary

Blinko is an AI-powered card note-taking project. Prior to version 1.8.4, there is a privilege escalation vulnerability. The upsertUser endpoint has 3 issues: it is missing superAdminAuthMiddleware, any logged-in user can call it; the originalPassword is an optional parameter and if not provided password verification is skipped; there is no check for input.id === ctx.id (ownership verification). This could result in any authenticated user modifying other users' passwords, direct escalation to superadmin, and complete account takeover. This issue has been patched in version 1.8.4.

Affected Software

Weaknesses

• CWE-288: CWE-288: Authentication Bypass Using an Alternate Path or Channel

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: yes
  • Technical Impact: partial

References

• https://github.com/blinkospace/blinko/security/advisories/GHSA-r3mv-q7ww-86p6
• https://github.com/blinkospace/blinko/commit/3afbdf486b6f371bdac5781dea6289749f2c4c03
• https://github.com/blinkospace/blinko/releases/tag/1.8.4

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