CVE-2026-71209

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-05. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS: 7.5Exploit: Elevated riskExposed: 0

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

audiobookshelf's authentication-exemption check (server/routers/Auth.js) matches unauthenticated-allowed GET routes against req.path via a regex requiring a literal /items/:id/cover or /authors/:id/image shape, where req.path retains %2F sequences URL-encoded. CacheManager.handleCoverCache then joins this decoded value into a cache file path and streams the result before any database-backed ownership check.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
65(Attend)
EG Risk 65/100SSVC: Attend

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
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
2%
EPSS %ILE
76%
KEV
Not listed

Published

August 5, 2026

Last Modified

August 10, 2026

Advisory Details (2)

Auto-updated Aug 5, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

GitHub - advplyr/audiobookshelf: Self-hosted audiobook and podcast server · GitHub

https://github.com/advplyr/audiobookshelf
github Patch Available🟡 PoC Available

Remote Authentication-Bypass can lead to server crash or limited information disclosure due to faulty pattern matching · Advisory · advplyr/audiobookshelf · GitHub

https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-pg8v-5jcv-wrvw

Vendor Advisories for CVE-2026-71209(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 30× in last 7d / 72× 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. 2026-08-20 23:53 UTCEG score recompute
  2. 2026-08-20 23:53 UTCGHSA enrichment
  3. 2026-08-20 22:56 UTCEPSS rescore
  4. 2026-08-20 10:40 UTCGHSA enrichment
  5. 2026-08-19 21:27 UTCEG score recompute
  6. 2026-08-19 21:27 UTCGHSA enrichment
  7. 2026-08-19 17:04 UTCEPSS rescore
  8. 2026-08-19 07:54 UTCGHSA enrichment
  9. 2026-08-18 18:42 UTCEG score recompute
  10. 2026-08-18 18:42 UTCGHSA enrichment
  11. 2026-08-18 13:49 UTCEPSS rescore
  12. 2026-08-18 13:49 UTCEPSS rescore
  13. 2026-08-18 05:30 UTCGHSA enrichment
  14. 2026-08-17 16:05 UTCEG score recompute
  15. 2026-08-17 16:05 UTCGHSA enrichment
  16. 2026-08-17 13:47 UTCEPSS rescore
  17. 2026-08-17 02:53 UTCEG score recompute
  18. 2026-08-17 02:53 UTCGHSA enrichment
  19. 2026-08-16 14:56 UTCEPSS rescore
  20. 2026-08-16 14:56 UTCEPSS rescore
  21. 2026-08-16 13:41 UTCEG score recompute
  22. 2026-08-16 13:41 UTCGHSA enrichment
  23. 2026-08-16 02:15 UTCEPSS rescore
  24. 2026-08-16 00:29 UTCGHSA enrichment
  25. 2026-08-15 11:17 UTCEG score recompute
Show 47 more
  1. 2026-08-15 11:17 UTCGHSA enrichment
  2. 2026-08-15 01:31 UTCEPSS rescore
  3. 2026-08-14 22:05 UTCGHSA enrichment
  4. 2026-08-14 08:50 UTCEG score recompute
  5. 2026-08-14 08:50 UTCGHSA enrichment
  6. 2026-08-13 22:00 UTCEPSS rescore
  7. 2026-08-13 19:38 UTCGHSA enrichment
  8. 2026-08-13 06:26 UTCGHSA enrichment
  9. 2026-08-12 17:14 UTCEG score recompute
  10. 2026-08-12 17:14 UTCGHSA enrichment
  11. 2026-08-12 13:51 UTCEPSS rescore
  12. 2026-08-12 04:02 UTCGHSA enrichment
  13. 2026-08-11 14:49 UTCEG score recompute
  14. 2026-08-11 14:49 UTCGHSA enrichment
  15. 2026-08-11 01:37 UTCEG score recompute
  16. 2026-08-11 01:37 UTCGHSA enrichment
  17. 2026-08-11 00:00 UTCEPSS rescore
  18. 2026-08-10 12:25 UTCEG score recompute
  19. 2026-08-10 12:25 UTCGHSA enrichment
  20. 2026-08-10 12:02 UTCGHSA enrichment
  21. 2026-08-10 11:22 UTCEG score recompute
  22. 2026-08-10 11:22 UTCGHSA enrichment
  23. 2026-08-10 00:04 UTCEG score recompute
  24. 2026-08-10 00:04 UTCGHSA enrichment
  25. 2026-08-09 13:47 UTCEPSS rescore
  26. 2026-08-09 10:52 UTCGHSA enrichment
  27. 2026-08-08 21:40 UTCEG score recompute
  28. 2026-08-08 21:40 UTCGHSA enrichment
  29. 2026-08-08 16:37 UTCEPSS rescore
  30. 2026-08-08 08:28 UTCGHSA enrichment
  31. 2026-08-07 19:16 UTCEG score recompute
  32. 2026-08-07 19:16 UTCGHSA enrichment
  33. 2026-08-07 06:04 UTCGHSA enrichment
  34. 2026-08-06 16:51 UTCEG score recompute
  35. 2026-08-06 16:51 UTCGHSA enrichment
  36. 2026-08-06 13:47 UTCEPSS rescore
  37. 2026-08-06 03:39 UTCEG score recompute
  38. 2026-08-06 03:39 UTCGHSA enrichment
  39. 2026-08-05 19:17 UTCEPSS rescore
  40. 2026-08-05 19:17 UTCEPSS rescore
  41. 2026-08-05 14:27 UTCEG score recompute
  42. 2026-08-05 14:27 UTCGHSA enrichment
  43. 2026-08-05 13:47 UTCEG score recompute
  44. 2026-08-05 13:47 UTCGHSA enrichment
  45. 2026-08-05 08:20 UTCEG score recompute
  46. 2026-08-05 07:22 UTCEG score recompute
  47. 2026-08-05 07:20 UTCMITRE cvelistV5first tracked

Publicly available exploits

(1 reference)

Working exploit code is in the public domain. Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Nucleihttp/cves/2026/CVE-2026-71209.yaml
    First seen Jan 1, 2026

    Audiobookshelf - Authentication Bypass

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-71209?
CVE-2026-71209 is a high vulnerability published on August 5, 2026. audiobookshelf's authentication-exemption check (server/routers/Auth.js) matches unauthenticated-allowed GET routes against req.path via a regex requiring a literal /items/:id/cover or /authors/:id/image shape, where req.path retains %2F sequences URL-encoded. CacheManager.handleCoverCache then…
When was CVE-2026-71209 disclosed?
CVE-2026-71209 was first published in the National Vulnerability Database on August 5, 2026, with the most recent update on August 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-71209 actively exploited?
CVE-2026-71209 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2% probability of exploitation in the next 30 days, which ranks it in the top 23.8% of all scored CVEs.
What is the CVSS score of CVE-2026-71209?
CVE-2026-71209 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-71209?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-71209, 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

Explore the affected products and dependency analysis for CVE-2026-71209

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