CVE-2026-79664

HIGHPre-NVD 7.47.4
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 7.4 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-25. The CNA's CVSS baseline 7.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: the CNA's CVSS, EPSS, GitHub Security Advisory
Trending — 3 sources updated this weekElevated
7.4EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 7.4Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

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
7.4HIGHmedium confidence
EG Risk
49
EG Risk 49/100

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 (value × EchelonGraph’s weight)
Severity74% × 45%
The EG Score, 7.4 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
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
0.3%
EPSS %ILE
18th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Track* at medium and Attend at high mission impact.

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 no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 25, 2026

Last Modified

October 8, 2026

Advisory Details (2)

Auto-updated Aug 25, 2026
Patch available. Sources: github.
Web page

Ech0 before 4.7.3 Access Token Revocation Bypass | Advisories | VulnCheck

https://www.vulncheck.com/advisories/ech0-before-access-token-revocation-bypass
GitHub advisoryMentions a patch (unverified)

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 rangeFix by version rangeDependents
github.com/lin-snow/ech0—
  • every version up to 1.4.8-0.20260503041146-eab62379c795: fixed in 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 22× in last 7d / 110× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 188 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 88 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  2. 2026-10-13 06:37 UTCEG score recompute
  3. 2026-10-13 06:37 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  4. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  5. 2026-10-12 14:58 UTCEG score recompute
  6. 2026-10-11 19:22 UTCEG score recompute
  7. 2026-10-11 16:38 UTCEG score recompute
  8. 2026-10-11 13:56 UTCEG score recompute
  9. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  10. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  11. 2026-10-10 12:17 UTCEG score recompute
  12. 2026-10-10 12:16 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  13. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  14. 2026-10-09 04:30 UTCEG score recompute
  15. 2026-10-09 04:30 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  16. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  17. 2026-10-08 15:41 UTCEG score recompute
  18. 2026-10-08 15:41 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  19. 2026-10-08 03:31 UTCEG score recompute
  20. 2026-10-08 03:30 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  21. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  22. 2026-10-07 06:38 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  23. 2026-10-06 19:19 UTCEG score recompute
  24. 2026-10-06 19:19 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  25. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.3% · 18th percentile
Show 75 more
  1. 2026-10-06 07:43 UTCEG score recompute
  2. 2026-10-06 07:43 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  3. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  4. 2026-10-05 17:03 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  5. 2026-10-05 03:59 UTCEG score recompute
  6. 2026-10-05 03:58 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  7. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  8. 2026-10-04 16:13 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  9. 2026-10-04 04:53 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  10. 2026-10-03 17:31 UTCEG score recompute
  11. 2026-10-03 17:31 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  12. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  13. 2026-10-03 06:12 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  14. 2026-10-02 18:53 UTCEG score recompute
  15. 2026-10-02 18:53 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  16. 2026-10-02 17:57 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  17. 2026-10-02 07:34 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  18. 2026-10-01 20:15 UTCEG score recompute
  19. 2026-10-01 20:15 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  20. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  21. 2026-10-01 07:34 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  22. 2026-09-30 20:15 UTCEG score recompute
  23. 2026-09-30 20:15 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  24. 2026-09-30 06:50 UTCEG score recompute
  25. 2026-09-30 06:50 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  26. 2026-09-29 15:24 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  27. 2026-09-29 08:48 UTCEG score recompute
  28. 2026-09-29 08:48 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  29. 2026-09-28 21:30 UTCEG score recompute
  30. 2026-09-28 21:30 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  31. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  32. 2026-09-28 08:10 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  33. 2026-09-27 20:51 UTCEG score recompute
  34. 2026-09-27 20:51 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  35. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  36. 2026-09-27 09:33 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  37. 2026-09-26 22:07 UTCEG score recompute
  38. 2026-09-26 22:07 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  39. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  40. 2026-09-26 00:28 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  41. 2026-09-25 06:11 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  42. 2026-09-24 18:52 UTCEG score recompute
  43. 2026-09-24 18:52 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  44. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  45. 2026-09-24 06:25 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  46. 2026-09-23 19:05 UTCEG score recompute
  47. 2026-09-23 19:05 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  48. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  49. 2026-09-23 17:52 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  50. 2026-09-23 06:25 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  51. 2026-09-22 19:06 UTCEG score recompute
  52. 2026-09-22 19:06 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  53. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  54. 2026-09-22 04:44 UTCEG score recompute
  55. 2026-09-22 04:44 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  56. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  57. 2026-09-21 17:23 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  58. 2026-09-21 05:37 UTCEG score recompute
  59. 2026-09-21 05:37 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  60. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  61. 2026-09-20 17:04 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  62. 2026-09-20 05:45 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  63. 2026-09-19 18:26 UTCEG score recompute
  64. 2026-09-19 18:26 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  65. 2026-09-19 07:06 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  66. 2026-09-18 19:47 UTCEG score recompute
  67. 2026-09-18 19:47 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  68. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  69. 2026-09-18 08:28 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  70. 2026-09-17 21:09 UTCEG score recompute
  71. 2026-09-17 21:09 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  72. 2026-09-17 06:53 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  73. 2026-09-16 19:27 UTCEG score recompute
  74. 2026-09-16 19:27 UTCGHSA enrichmentGHSA-3r5q-vfpj-wprr · GitHub severity CRITICAL · GitHub CVSS 7.4
  75. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 12th percentile

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Frequently asked(5)

What is CVE-2026-79664?
CVE-2026-79664 is a high-severity vulnerability; its CVE record was 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 made public?
CVE-2026-79664 was made public on May 3, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on August 25, 2026. EchelonGraph's copy of the record carries a last-modified date of October 8, 2026; the record at its source may have been updated since.
Is CVE-2026-79664 actively exploited?
CVE-2026-79664 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (18th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-79664?
CVE-2026-79664 has a CVSS base score of 7.4 (the CNA's own assessment, by vulncheck; NVD's own analysis pending).
How do I remediate CVE-2026-79664?
A fix for CVE-2026-79664 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-79664 are linked in the Vendor Advisories panel on this page.

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