CVE-2026-36727

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-09. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.1Exploit: None knownExposed: 0

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

An insecure authentication vulnerability in the /api/social-sign-in endpoint of bookcars v8.3 allows attackers to bypass authentication via a forged JWT token.

CVSS v3
9.1
EG Score
9.1(medium)
EG Risk
46(Track)
EG Risk 46/100SSVC: 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
Severity91% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
29%
KEV
Not listed

Published

June 9, 2026

Last Modified

July 23, 2026

Advisory Details (1)

Auto-updated Aug 29, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Vulnerabilities/bookcars/vulnerability-1 at master · CC-T-454455/Vulnerabilities · GitHub

https://github.com/CC-T-454455/Vulnerabilities/tree/master/bookcars/vulnerability-1

Vendor Advisories for CVE-2026-36727(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 13× in last 7d / 145× 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 388 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-36727?
CVE-2026-36727 is a critical vulnerability published on June 9, 2026. An insecure authentication vulnerability in the /api/social-sign-in endpoint of bookcars v8.3 allows attackers to bypass authentication via a forged JWT token.
When was CVE-2026-36727 disclosed?
CVE-2026-36727 was first published in the National Vulnerability Database on June 9, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-36727 actively exploited?
CVE-2026-36727 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 70.8% of all scored CVEs.
What is the CVSS score of CVE-2026-36727?
CVE-2026-36727 has a CVSS v3.1 base score of 9.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-36727?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-36727, 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.

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