CVE-2026-71209

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM 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: 1.9%CVSS: 7.5Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

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
7.5HIGHmedium confidence
EG Risk
65
EG Risk 65/100CISA SSVC

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%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
1.9%
EPSS %ILE
79th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 5, 2026

Last Modified

August 26, 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 19× in last 7d / 85× 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.

Showing the most recent 100 of 204 total refreshes for this CVE.

  1. 2026-10-04 23:36 UTCEG score recompute
  2. 2026-10-04 23:36 UTCGHSA enrichment
  3. 2026-10-04 23:22 UTCEPSS rescore
  4. 2026-10-04 06:04 UTCEG score recompute
  5. 2026-10-04 06:04 UTCGHSA enrichment
  6. 2026-10-03 14:26 UTCEPSS rescore
  7. 2026-10-03 01:13 UTCEG score recompute
  8. 2026-10-03 01:13 UTCGHSA enrichment
  9. 2026-10-02 17:56 UTCEPSS rescore
  10. 2026-10-02 10:01 UTCEG score recompute
  11. 2026-10-02 10:00 UTCGHSA enrichment
  12. 2026-10-01 19:50 UTCEPSS rescore
  13. 2026-10-01 15:39 UTCGHSA enrichment
  14. 2026-10-01 02:21 UTCEG score recompute
  15. 2026-10-01 02:21 UTCGHSA enrichment
  16. 2026-09-30 15:03 UTCEPSS rescore
  17. 2026-09-29 06:20 UTCEG score recompute
  18. 2026-09-29 06:20 UTCGHSA enrichment
  19. 2026-09-28 13:52 UTCEPSS rescore
  20. 2026-09-28 07:05 UTCGHSA enrichment
  21. 2026-09-27 17:46 UTCEG score recompute
  22. 2026-09-27 17:46 UTCGHSA enrichment
  23. 2026-09-27 13:48 UTCEPSS rescore
  24. 2026-09-26 15:59 UTCEPSS rescore
  25. 2026-09-25 04:35 UTCEG score recompute
Show 75 more
  1. 2026-09-25 04:35 UTCGHSA enrichment
  2. 2026-09-24 10:45 UTCGHSA enrichment
  3. 2026-09-23 21:21 UTCEG score recompute
  4. 2026-09-23 21:21 UTCGHSA enrichment
  5. 2026-09-23 17:54 UTCEPSS rescore
  6. 2026-09-23 04:28 UTCEG score recompute
  7. 2026-09-23 04:28 UTCGHSA enrichment
  8. 2026-09-22 15:07 UTCGHSA enrichment
  9. 2026-09-22 01:55 UTCEG score recompute
  10. 2026-09-22 01:55 UTCGHSA enrichment
  11. 2026-09-21 21:09 UTCEPSS rescore
  12. 2026-09-20 20:49 UTCGHSA enrichment
  13. 2026-09-19 23:18 UTCEG score recompute
  14. 2026-09-19 23:18 UTCGHSA enrichment
  15. 2026-09-19 07:50 UTCEG score recompute
  16. 2026-09-19 07:50 UTCGHSA enrichment
  17. 2026-09-18 19:28 UTCEPSS rescore
  18. 2026-09-18 18:25 UTCGHSA enrichment
  19. 2026-09-18 05:13 UTCEG score recompute
  20. 2026-09-18 05:13 UTCGHSA enrichment
  21. 2026-09-17 16:01 UTCGHSA enrichment
  22. 2026-09-17 01:08 UTCEG score recompute
  23. 2026-09-17 01:08 UTCGHSA enrichment
  24. 2026-09-16 14:08 UTCEPSS rescore
  25. 2026-09-16 05:42 UTCEG score recompute
  26. 2026-09-16 05:42 UTCGHSA enrichment
  27. 2026-09-16 05:15 UTCEPSS rescore
  28. 2026-09-15 16:29 UTCEG score recompute
  29. 2026-09-15 16:29 UTCGHSA enrichment
  30. 2026-09-15 03:12 UTCEPSS rescore
  31. 2026-09-15 01:32 UTCGHSA enrichment
  32. 2026-09-14 08:46 UTCGHSA enrichment
  33. 2026-09-13 19:34 UTCEG score recompute
  34. 2026-09-13 19:34 UTCGHSA enrichment
  35. 2026-09-13 06:21 UTCGHSA enrichment
  36. 2026-09-12 17:09 UTCEG score recompute
  37. 2026-09-12 17:09 UTCGHSA enrichment
  38. 2026-09-12 15:02 UTCEPSS rescore
  39. 2026-09-12 03:57 UTCEG score recompute
  40. 2026-09-12 03:57 UTCGHSA enrichment
  41. 2026-09-11 14:53 UTCEPSS rescore
  42. 2026-09-11 14:43 UTCEG score recompute
  43. 2026-09-11 14:43 UTCGHSA enrichment
  44. 2026-09-10 22:05 UTCEG score recompute
  45. 2026-09-10 22:05 UTCGHSA enrichment
  46. 2026-09-10 09:35 UTCEPSS rescore
  47. 2026-09-10 08:52 UTCGHSA enrichment
  48. 2026-09-09 19:39 UTCGHSA enrichment
  49. 2026-09-09 06:27 UTCEG score recompute
  50. 2026-09-09 06:27 UTCGHSA enrichment
  51. 2026-09-08 22:01 UTCEPSS rescore
  52. 2026-09-08 08:02 UTCGHSA enrichment
  53. 2026-09-07 18:24 UTCEG score recompute
  54. 2026-09-07 18:24 UTCGHSA enrichment
  55. 2026-09-06 20:54 UTCEG score recompute
  56. 2026-09-06 20:54 UTCGHSA enrichment
  57. 2026-09-06 13:48 UTCEPSS rescore
  58. 2026-09-06 07:41 UTCGHSA enrichment
  59. 2026-09-05 18:29 UTCEG score recompute
  60. 2026-09-05 18:29 UTCGHSA enrichment
  61. 2026-09-05 03:56 UTCEG score recompute
  62. 2026-09-05 03:56 UTCGHSA enrichment
  63. 2026-09-04 09:46 UTCEG score recompute
  64. 2026-09-04 09:46 UTCGHSA enrichment
  65. 2026-09-04 05:07 UTCEPSS rescore
  66. 2026-09-03 20:33 UTCGHSA enrichment
  67. 2026-09-03 07:03 UTCEG score recompute
  68. 2026-09-03 07:03 UTCGHSA enrichment
  69. 2026-09-02 14:12 UTCEPSS rescore
  70. 2026-09-02 10:00 UTCGHSA enrichment
  71. 2026-09-01 20:42 UTCEG score recompute
  72. 2026-09-01 20:42 UTCGHSA enrichment
  73. 2026-09-01 13:54 UTCEPSS rescore
  74. 2026-09-01 04:40 UTCEPSS rescore
  75. 2026-08-31 22:53 UTCGHSA enrichment

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 on August 5, 2026, with the most recent update on August 26, 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 1.9% probability of exploitation in the next 30 days (79th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-71209?
CVE-2026-71209 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-71209?
A fix for CVE-2026-71209 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-71209 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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