CVE-2026-78654

HIGHPre-NVD 7.37.3—
EchelonGraph scoreMEDIUM confidence

Score 7.3 from GitHub Security Advisory published 2026-08-25. A secondary CVSS source baseline 7.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
7.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.7%CVSS: 7.3Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

A vulnerability has been found in cleverbrush framework and deep up to 4.4.0. This impacts the function deepExtend of the file libs/deep/src/deepExtend.ts. The manipulation leads to improperly controlled modification of object prototype attributes. Remote exploitation of the attack is possible. The exploit has been disclosed to the public and may be used. Upgrading to version 4.4.1 will fix this issue. The identifier of the patch is 810398c1308c500c3b8b6af380b5a89371389327. You should upgrade the affected component.

CVSS v3
7.3
EG Score
7.3HIGHmedium confidence
EG Risk
64
EG Risk 64/100CISA 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
Severity73% × 45%
Exploitation40% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
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
0.7%
EPSS %ILE
52nd
KEV
Not listed

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

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 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 25, 2026

Last Modified

September 28, 2026

Advisory Details (3)

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

GitHub - cleverbrush/framework: A collection of lightweight, strongly-typed TypeScript utility libraries — schema validation with type inference, async helpers, deep object operations, object mapping, job scheduling, and more. · GitHub

https://github.com/cleverbrush/framework/
github_pr Patch Available

v4.4.1

Patch available: cleverbrush/framework @cleverbrush/[email protected] (PR #215 merged 2026-07-13)

https://github.com/cleverbrush/framework/pull/215
generic🟡 PoC Available

Prototype pollution in deepExtend() via unguarded __proto__ key in recursive merge · Issue #213 · cleverbrush/framework · GitHub

https://github.com/cleverbrush/framework/issues/213

Vendor Advisories for CVE-2026-78654(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 22× in last 7d / 105× 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 175 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-78654?
CVE-2026-78654 is a high vulnerability published on August 25, 2026. A vulnerability has been found in cleverbrush framework and deep up to 4.4.0. This impacts the function deepExtend of the file libs/deep/src/deepExtend.ts. The manipulation leads to improperly controlled modification of object prototype attributes. Remote exploitation of the attack is possible. The…
When was CVE-2026-78654 disclosed?
CVE-2026-78654 was first published on August 25, 2026, with the most recent update on September 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-78654 actively exploited?
CVE-2026-78654 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (52nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-78654?
CVE-2026-78654 has a CVSS base score of 7.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-78654?
A fix for CVE-2026-78654 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-78654 are linked in the Vendor Advisories panel on this page.

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