Authorization bypass in bookwyrm-social bookwyrm
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-639.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| bookwyrm-social | bookwyrm | up to 0.9.1 | — | No fix listed | CNA |
- bookwyrm Vendorbookwyrm-social Affected up to 0.9.1 Fixed in — No fix listed CNA
CPE names Threatist (inferred) · 1
Inferred from how NVD named this product before; not given by a source.
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:joinbookwyrm:bookwyrm:*:*:*:*:*:*:*:* | — | — | bookwyrm-social |
- cpe:2.3:a:joinbookwyrm:bookwyrm:*:*:*:*:*:*:*:* Versions — — ·bookwyrm-social
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-86113
- 2026-10-03 Alias added: GHSA-4p9p-pq58-9cvp
References
More bookwyrm-social vulnerabilities
- TI-2022-16352 Missing rate limit in Authentication in bookwyrm CVSS 3.1CRITICAL 9.8
- TI-2026-58910 BookWyrm through 0.9.1 Insecure Direct Object Reference in EditStatus Exposes Followers-Only and Direct Statuses CVSS 4.0HIGH 7.1
- TI-2022-16380 URL Redirection to Untrusted Site ('Open Redirect') in bookwyrm CVSS 3.1HIGH 7.1
- TI-2022-02451 Authentication Bypass by Primary Weakness in bookwyrm-social/bookwyrm CVSS 3.1CRITICAL 9.8
- TI-2022-07696 Server-side request forgery in BookWyrm CVSS 3.1HIGH 8.8
- TI-2022-13180 Cross-site Scripting in BookWyrm CVSS 3.1MEDIUM 6.3
Sources
- CVE-2026-86113 · CVE Program
- CVE-2026-86113 · NVD
- FIRST EPSS
- GHSA-4p9p-pq58-9cvp · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences