What is CVE-2026-86111?

CVE-2026-86111 is a medium-severity vulnerability in Bookwyrm-Social Bookwyrm, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-09-05.

How severe is CVE-2026-86111?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Bookwyrm-Social Bookwyrm

CVE-2026-86111

BookWyrm through 0.9.1 fails to validate user visibility permissions in the status edit endpoint, allowing authenticated attackers to read followers-only and direct-message reviews by enumerating sequential status IDs. Attackers can access the raw content of restricted statuses through the edit view, bypassing the privacy protections documented for these message types.

Vulnerability class: IDOR (Insecure Direct Object Reference)

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Bookwyrm-social Bookwyrm

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

disclosure@vulncheck.com (product)
disclosure@vulncheck.com (technical-description)
disclosure@vulncheck.com (technical-description)
disclosure@vulncheck.com (technical-description)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-86111?: CVE-2026-86111 is a medium-severity vulnerability in Bookwyrm-Social Bookwyrm, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-09-05.
How severe is CVE-2026-86111?: Medium severity. CVSS v3 base score is 6.5 out of 10.