CVE-2026-67974

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-04. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this weekElevated
7.5EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 7.5Exploit: Elevated riskExposed services: Not assessed

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

A parser boundary flaw in the Software Bus Network (SBN) application's peer subscription message handling in NASA cFS v7.0.1 allows attackers to cause a Denial of Service (DoS) via sending a crafted packet.

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: 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
0.5%
EPSS %ILE
42nd
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 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 3, 2026

Last Modified

August 31, 2026

Advisory Details (2)

Auto-updated Aug 6, 2026
No patch confirmed yet.
generic

[SECURITY] SBN subscription/unsubscription parser reads past real network payload due to missing MsgSz boundary check · Issue #1074 · nasa/cFS · GitHub

https://github.com/nasa/cFS/issues/1074
generic

GitHub - nasa/cFS: The Core Flight System (cFS) · GitHub

https://github.com/nasa/cFS

Vendor Advisories for CVE-2026-67974(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 / 82× 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 192 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-67974?
CVE-2026-67974 is a high vulnerability published on August 3, 2026. A parser boundary flaw in the Software Bus Network (SBN) application's peer subscription message handling in NASA cFS v7.0.1 allows attackers to cause a Denial of Service (DoS) via sending a crafted packet.
When was CVE-2026-67974 disclosed?
CVE-2026-67974 was first published on August 3, 2026, with the most recent update on August 31, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-67974 actively exploited?
CVE-2026-67974 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (42nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-67974?
CVE-2026-67974 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-67974?
No fix for CVE-2026-67974 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-2026-67974 are linked in the Vendor Advisories panel on this page.

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