CVE-2026-86113

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-05. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
6.5
EG Score
6.5(high)
EG Risk
45(Track)
EG Risk 45/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity65% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
15%
KEV
Not listed

Published

September 5, 2026

Last Modified

September 8, 2026

Advisory Details (4)

Auto-updated Sep 5, 2026
No patch confirmed yet.
generic

BookWyrm through 0.9.1 Insecure Direct Object Reference in edit-readthrough Allows Tampering with Other Users' Reading Records | Advisories | VulnCheck

https://www.vulncheck.com/advisories/bookwyrm-through-0.9.1-insecure-direct-object-reference-in-edit-readthrough-allows-tampering-with-other-users-reading-records
generic

oss/bookwyrm.md at main · geo-chen/oss · GitHub

https://github.com/geo-chen/oss/blob/main/bookwyrm.md#finding-3-authenticated-idor-in-edit-readthrough-allows-tampering-with-other-users-reading-progress
generic

bookwyrm/bookwyrm/views/status.py at v0.9.1 · bookwyrm-social/bookwyrm · GitHub

https://github.com/bookwyrm-social/bookwyrm/blob/v0.9.1/bookwyrm/views/status.py
generic

GitHub - bookwyrm-social/bookwyrm: Social reading and reviewing, decentralized with ActivityPub · GitHub

https://github.com/bookwyrm-social/bookwyrm

Vendor Advisories for CVE-2026-86113(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 20× in last 7d / 47× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-21 01:55 UTCEG score recompute
  2. 2026-09-21 01:55 UTCGHSA enrichment
  3. 2026-09-20 20:16 UTCEPSS rescore
  4. 2026-09-20 01:42 UTCEG score recompute
  5. 2026-09-20 01:42 UTCGHSA enrichment
  6. 2026-09-19 01:30 UTCEG score recompute
  7. 2026-09-19 01:30 UTCGHSA enrichment
  8. 2026-09-18 19:28 UTCEPSS rescore
  9. 2026-09-18 01:15 UTCEG score recompute
  10. 2026-09-18 01:15 UTCGHSA enrichment
  11. 2026-09-17 19:32 UTCEPSS rescore
  12. 2026-09-17 01:03 UTCEG score recompute
  13. 2026-09-17 01:03 UTCGHSA enrichment
  14. 2026-09-16 14:09 UTCEPSS rescore
  15. 2026-09-16 05:15 UTCEPSS rescore
  16. 2026-09-16 00:51 UTCEG score recompute
  17. 2026-09-16 00:51 UTCGHSA enrichment
  18. 2026-09-15 03:12 UTCEPSS rescore
  19. 2026-09-15 03:12 UTCEPSS rescore
  20. 2026-09-15 00:39 UTCGHSA enrichment
  21. 2026-09-14 00:27 UTCEG score recompute
  22. 2026-09-14 00:27 UTCGHSA enrichment
  23. 2026-09-13 00:15 UTCEG score recompute
  24. 2026-09-13 00:15 UTCGHSA enrichment
  25. 2026-09-12 00:03 UTCEG score recompute
Show 22 more
  1. 2026-09-12 00:03 UTCGHSA enrichment
  2. 2026-09-11 14:53 UTCEPSS rescore
  3. 2026-09-11 14:53 UTCEPSS rescore
  4. 2026-09-10 23:50 UTCEG score recompute
  5. 2026-09-10 23:50 UTCGHSA enrichment
  6. 2026-09-09 23:20 UTCEG score recompute
  7. 2026-09-09 23:20 UTCGHSA enrichment
  8. 2026-09-08 22:01 UTCEPSS rescore
  9. 2026-09-08 20:14 UTCGHSA enrichment
  10. 2026-09-08 15:13 UTCEG score recompute
  11. 2026-09-08 15:13 UTCGHSA enrichment
  12. 2026-09-08 14:15 UTCEG score recompute
  13. 2026-09-08 14:15 UTCGHSA enrichment
  14. 2026-09-08 10:59 UTCEG score recompute
  15. 2026-09-08 10:59 UTCGHSA enrichment
  16. 2026-09-07 10:43 UTCEG score recompute
  17. 2026-09-07 10:43 UTCGHSA enrichment
  18. 2026-09-06 13:48 UTCEPSS rescore
  19. 2026-09-06 10:28 UTCEG score recompute
  20. 2026-09-06 10:28 UTCGHSA enrichment
  21. 2026-09-05 10:16 UTCEG score recompute
  22. 2026-09-05 10:13 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-86113?
CVE-2026-86113 is a medium vulnerability published on September 5, 2026. 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…
When was CVE-2026-86113 disclosed?
CVE-2026-86113 was first published in the National Vulnerability Database on September 5, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-86113 actively exploited?
CVE-2026-86113 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 84.6% of all scored CVEs.
What is the CVSS score of CVE-2026-86113?
CVE-2026-86113 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-86113?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-86113, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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