CVE-2026-79664

HIGHPre-NVD 7.47.4—
EchelonGraph scoreHIGH confidence

Score 7.4 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-25. a secondary CVSS source baseline 7.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
7.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.4Exploit: Elevated riskExposed: 0

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

Ech0 before 4.7.3 fails to properly revoke access tokens created with never-expire option, allowing attackers to maintain perpetual authenticated access after token theft. Three independent revocation mechanisms fail: logout panics on nil ExpiresAt field, RevokeToken skips when remainTTL is zero, and admin delete does not blacklist the JTI, leaving stolen tokens cryptographically valid until JWT secret rotation.

CVSS v3
7.4
EG Score
7.4(high)
EG Risk
49(Track*)
EG Risk 49/100SSVC: 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
Severity74% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
12%
KEV
Not listed

Published

August 25, 2026

Last Modified

August 25, 2026

Advisory Details (2)

Auto-updated Aug 25, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

Ech0 before 4.7.3 Access Token Revocation Bypass | Advisories | VulnCheck

https://www.vulncheck.com/advisories/ech0-before-access-token-revocation-bypass
github Patch Available🟡 PoC Available

Access tokens with expiry=never cannot be revoked: logout panics, delete does not blacklist JTI · Advisory · lin-snow/Ech0 · GitHub

https://github.com/lin-snow/Ech0/security/advisories/GHSA-fpw6-hrg5-q5x5

Vendor Advisories for CVE-2026-79664(1)

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

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFixed inDependents
github.com/lin-snow/ech0—1.4.8-0.20260503041146-eab62379c795—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 26× in last 7d / 101× 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 101 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-79664?
CVE-2026-79664 is a high vulnerability published on August 25, 2026. Ech0 before 4.7.3 fails to properly revoke access tokens created with never-expire option, allowing attackers to maintain perpetual authenticated access after token theft. Three independent revocation mechanisms fail: logout panics on nil ExpiresAt field, RevokeToken skips when remainTTL is zero,…
When was CVE-2026-79664 disclosed?
CVE-2026-79664 was first published in the National Vulnerability Database on August 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-79664 actively exploited?
CVE-2026-79664 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 87.6% of all scored CVEs.
What is the CVSS score of CVE-2026-79664?
CVE-2026-79664 has a CVSS v3 base score of 7.4 (NVD).
How do I remediate CVE-2026-79664?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-79664, 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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