What is CVE-2026-86113?

CVE-2026-86113 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-2026-86113?

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

Auth bypass in Bookwyrm-Social Bookwyrm

CVE-2026-86113

BookWyrm through 0.9.1 contains an authorization bypass vulnerability in the edit_readthrough function that allows authenticated users to modify other users' reading records. Attackers can exploit sequential ReadThrough IDs to overwrite arbitrary users' start dates, finish dates, progress, and progress mode, affecting reading statistics and exported data.

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:N/I:H/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 (third-party-advisory)

Frequently asked questions

What is CVE-2026-86113?: CVE-2026-86113 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-2026-86113?: Medium severity. CVSS v3 base score is 6.5 out of 10.