Blinko through 1.8.8 IDOR via Tag tRPC Router Procedures

Advisories

Blinko through 1.8.8 IDOR via Tag tRPC Router Procedures

Severity: medium
Date: 10/20/2026
Affecting: blinko <= 1.8.8
CVE: CVE-2026-113597
CWE: CWE-639 Authorization Bypass Through User-Controlled Key
CVSS: 5.3
CVSS V4 Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
References: https://github.com/blinkospace/blinko/issues/1112
https://github.com/blinkospace/blinko/pull/1171
https://github.com/blinkospace/blinko/blob/1.8.8/server/routerTrpc/tag.ts
Credit: lighthousekeeper1212, leediay153 from Viettel Post
Description: Blinko through 1.8.8 contains an insecure direct object reference vulnerability in the tag tRPC router that allows authenticated users to read and modify other users' tags by supplying arbitrary tag IDs. Attackers can enumerate sequential IDs via fullTagNameById, updateTagIcon, and updateTagOrder to reveal private note topics and tamper with tag icons and ordering.

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