CVE-2026-86113

Medium

Description

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.

SeverityMedium

CVSS6.5

Exploit probability—

ProductBookwyrm

PublishedSep 5, 2026

First seenSep 5, 2026

Weakness typeCWE-639Authorization bypass through user-controlled key

How to fix

Sources list no fixed version or patch link for this vulnerability.

Affected products

Product	Affected versions	Fixed in
bookwyrm-social bookwyrm	v ≤ 0.9.1	—

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