What is CVE-2026-56772?

CVE-2026-56772 is a medium-severity vulnerability in Samuelclay Newsblur, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2026-06-25.

How severe is CVE-2026-56772?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Auth bypass in Samuelclay Newsblur

CVE-2026-56772

NewsBlur before 14.5.0 contains a broken access control vulnerability that allows authenticated users to read private notification feeds by supplying arbitrary user_id values to the GET /social/interactions endpoint without ownership verif…

Vulnerability class: IDOR (Insecure Direct Object Reference)

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

Affected products

Samuelclay Newsblur — versions 0

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

disclosure@vulncheck.com (release-notes)
disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-56772?: CVE-2026-56772 is a medium-severity vulnerability in Samuelclay Newsblur, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2026-06-25.
How severe is CVE-2026-56772?: Medium severity. CVSS v3 base score is 4.3 out of 10.