CVE-2026-21279

HIGHPre-NVD 8.28.2—
EchelonGraph scoreMEDIUM confidence

Score 8.2 from GitHub Security Advisory (severity: HIGH) published 2026-08-11. A secondary CVSS source baseline 8.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.2EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.8%CVSS: 8.2Exploit: None knownExposed services: Not assessed

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

is affected by an Improper Input Validation vulnerability that could result in a Security feature bypass. An attacker could leverage this vulnerability to bypass security measures and gain unauthorized read and limited write access. Exploitation of this issue does not require user interaction.

CVSS v3
8.2
EG Score
8.2HIGHmedium confidence
EG Risk
52
EG Risk 52/100CISA 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
Severity82% × 45%
Exploitation1% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
0.8%
EPSS %ILE
54th
KEV
Not listed

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

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation none (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 11, 2026

Last Modified

August 28, 2026

References (1)

Vendor Advisories for CVE-2026-21279(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 17× in last 7d / 88× 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 182 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-21279?
CVE-2026-21279 is a high vulnerability published on August 11, 2026. is affected by an Improper Input Validation vulnerability that could result in a Security feature bypass. An attacker could leverage this vulnerability to bypass security measures and gain unauthorized read and limited write access. Exploitation of this issue does not require user interaction.
When was CVE-2026-21279 disclosed?
CVE-2026-21279 was first published on August 11, 2026, with the most recent update on August 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-21279 actively exploited?
CVE-2026-21279 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.8% probability of exploitation in the next 30 days (54th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-21279?
CVE-2026-21279 has a CVSS base score of 8.2 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-21279?
No fix for CVE-2026-21279 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-21279 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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