CVE-2026-86113: Authorization Bypass Through User-Controlled Key in bookwyrm-social bookwyrm
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.
CVSS v4.0
Score 7.1high
Affected software
bookwyrm-social
bookwyrm
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-86113 describes an authorization bypass vulnerability in BookWyrm (up to version 0.9.1) within the edit_readthrough function. The flaw allows authenticated users to alter other users' reading records by exploiting predictable sequential ReadThrough IDs. This unauthorized modification can affect critical user data such as reading progress and dates, thereby compromising the accuracy of reading statistics and any exported data derived from these records.
Potential Impact
The vulnerability permits authenticated users to overwrite arbitrary users' reading data, including start dates, finish dates, progress, and progress mode. This undermines data integrity and trustworthiness of reading statistics and exported data but does not indicate direct system compromise or data disclosure beyond these records.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to authenticated users and monitor for suspicious activity related to ReadThrough record modifications.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-05T01:59:19.915Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a9bed73acd9273b49b1c668
Added to database: 09/05/2026, 10:22:43 UTC
Last enriched: 09/25/2026, 02:47:02 UTC
Last updated: 10/21/2026, 13:20:24 UTC
Views: 88
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.