What is CVE-2026-23488?

CVE-2026-23488 is a medium-severity vulnerability in Blinko, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.3/10. Published 2026-03-23.

How severe is CVE-2026-23488?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Auth bypass in Blinko

CVE-2026-23488

Blinko is an AI-powered card note-taking project. Prior to version 1.8.4, the /api/v1/comment/create endpoint has an unauthorized access vulnerability, allowing attackers to post comments on any note (including private notes) without authorization, even if the note has not been publicly shared. The /api/v1/comment/list endpoint has the same issue, allowing unauthorized viewing of comments on all notes. This issue has been patched in version 1.8.4.

Vulnerability class: IDOR (Insecure Direct Object Reference)

EPSS: 0.003 (22.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

Affected products

Blinko
Blinkospace Blinko — versions < 1.8.4

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
security-advisories@github.com (x_refsource_MISC, Release Notes)
security-advisories@github.com (Patch, x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2026-23488?: CVE-2026-23488 is a medium-severity vulnerability in Blinko, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.3/10. Published 2026-03-23.
How severe is CVE-2026-23488?: Medium severity. CVSS v3 base score is 5.3 out of 10.