CVE-2026-86113
BookWyrm through 0.9.1 Insecure Direct Object Reference in edit-readthrough Allows Tampering with Other Users' Reading Records
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-639 |
| Vendor | bookwyrm-social |
| Product | bookwyrm |
| Published | Sep 5, 2026 |
| Last Updated | Sep 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
Affected Versions
bookwyrm-social / bookwyrm
0 ≤ 0.9.1
References
github.com: https://github.com/geo-chen/oss/blob/main/bookwyrm.md#finding-3-authenticated-idor-in-edit-readthrough-allows-tampering-with-other-users-reading-progress github.com: https://github.com/bookwyrm-social/bookwyrm/blob/v0.9.1/bookwyrm/views/status.py github.com: https://github.com/bookwyrm-social/bookwyrm vulncheck.com: https://www.vulncheck.com/advisories/bookwyrm-through-0.9.1-insecure-direct-object-reference-in-edit-readthrough-allows-tampering-with-other-users-reading-records
Credits
🔍 George Chen