CVE-2026-78654

HIGHPre-NVD 7.37.3—
EchelonGraph scoreHIGH 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%CVSS: 7.3Exploit: Elevated riskExposed: 0

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

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
7.3(high)
EG Risk
64(Attend)
EG Risk 64/100SSVC: Attend

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%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
36%
KEV
Not listed

Published

August 25, 2026

Last Modified

August 26, 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 24× in last 7d / 102× 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 102 total refreshes for this CVE.

  1. 2026-09-19 13:22 UTCGHSA enrichment
  2. 2026-09-19 00:57 UTCEG score recompute
  3. 2026-09-19 00:57 UTCGHSA enrichment
  4. 2026-09-18 19:28 UTCEPSS rescore
  5. 2026-09-18 12:31 UTCGHSA enrichment
  6. 2026-09-18 00:05 UTCEG score recompute
  7. 2026-09-18 00:05 UTCGHSA enrichment
  8. 2026-09-17 10:16 UTCGHSA enrichment
  9. 2026-09-16 21:50 UTCEG score recompute
  10. 2026-09-16 21:50 UTCGHSA enrichment
  11. 2026-09-16 14:08 UTCEPSS rescore
  12. 2026-09-16 09:25 UTCEG score recompute
  13. 2026-09-16 09:25 UTCGHSA enrichment
  14. 2026-09-16 05:15 UTCEPSS rescore
  15. 2026-09-15 19:51 UTCGHSA enrichment
  16. 2026-09-15 07:25 UTCEG score recompute
  17. 2026-09-15 07:25 UTCGHSA enrichment
  18. 2026-09-15 03:12 UTCEPSS rescore
  19. 2026-09-15 03:12 UTCEPSS rescore
  20. 2026-09-14 18:59 UTCGHSA enrichment
  21. 2026-09-14 05:51 UTCGHSA enrichment
  22. 2026-09-13 17:26 UTCEG score recompute
  23. 2026-09-13 17:26 UTCGHSA enrichment
  24. 2026-09-13 05:01 UTCGHSA enrichment
  25. 2026-09-12 16:35 UTCEG score recompute
Show 75 more
  1. 2026-09-12 16:35 UTCGHSA enrichment
  2. 2026-09-12 04:10 UTCGHSA enrichment
  3. 2026-09-11 15:44 UTCEG score recompute
  4. 2026-09-11 15:44 UTCGHSA enrichment
  5. 2026-09-11 14:53 UTCEPSS rescore
  6. 2026-09-11 14:53 UTCEPSS rescore
  7. 2026-09-11 03:17 UTCGHSA enrichment
  8. 2026-09-10 14:51 UTCEG score recompute
  9. 2026-09-10 14:51 UTCGHSA enrichment
  10. 2026-09-10 02:25 UTCGHSA enrichment
  11. 2026-09-09 13:58 UTCGHSA enrichment
  12. 2026-09-09 01:18 UTCEG score recompute
  13. 2026-09-09 01:18 UTCGHSA enrichment
  14. 2026-09-08 22:01 UTCEPSS rescore
  15. 2026-09-08 04:25 UTCEG score recompute
  16. 2026-09-08 04:25 UTCGHSA enrichment
  17. 2026-09-07 15:59 UTCGHSA enrichment
  18. 2026-09-07 03:33 UTCGHSA enrichment
  19. 2026-09-06 15:02 UTCEG score recompute
  20. 2026-09-06 15:02 UTCGHSA enrichment
  21. 2026-09-06 13:48 UTCEPSS rescore
  22. 2026-09-06 02:35 UTCEG score recompute
  23. 2026-09-06 02:35 UTCGHSA enrichment
  24. 2026-09-05 14:10 UTCGHSA enrichment
  25. 2026-09-05 01:43 UTCEG score recompute
  26. 2026-09-05 01:43 UTCGHSA enrichment
  27. 2026-09-04 13:18 UTCEG score recompute
  28. 2026-09-04 13:17 UTCGHSA enrichment
  29. 2026-09-04 05:07 UTCEPSS rescore
  30. 2026-09-04 00:51 UTCGHSA enrichment
  31. 2026-09-03 12:24 UTCGHSA enrichment
  32. 2026-09-02 23:55 UTCEG score recompute
  33. 2026-09-02 23:55 UTCGHSA enrichment
  34. 2026-09-02 14:12 UTCEPSS rescore
  35. 2026-09-02 11:28 UTCGHSA enrichment
  36. 2026-09-01 22:58 UTCEG score recompute
  37. 2026-09-01 22:58 UTCGHSA enrichment
  38. 2026-09-01 13:54 UTCEPSS rescore
  39. 2026-09-01 10:32 UTCEG score recompute
  40. 2026-09-01 10:32 UTCGHSA enrichment
  41. 2026-09-01 04:40 UTCEPSS rescore
  42. 2026-09-01 04:40 UTCEPSS rescore
  43. 2026-08-31 22:02 UTCGHSA enrichment
  44. 2026-08-31 09:37 UTCGHSA enrichment
  45. 2026-08-30 21:10 UTCEG score recompute
  46. 2026-08-30 21:10 UTCGHSA enrichment
  47. 2026-08-30 19:18 UTCEPSS rescore
  48. 2026-08-30 19:17 UTCEPSS rescore
  49. 2026-08-30 08:45 UTCEG score recompute
  50. 2026-08-30 08:45 UTCGHSA enrichment
  51. 2026-08-30 01:22 UTCEPSS rescore
  52. 2026-08-29 20:19 UTCGHSA enrichment
  53. 2026-08-29 07:52 UTCEG score recompute
  54. 2026-08-29 07:52 UTCGHSA enrichment
  55. 2026-08-28 21:42 UTCEPSS rescore
  56. 2026-08-28 19:25 UTCGHSA enrichment
  57. 2026-08-28 06:39 UTCGHSA enrichment
  58. 2026-08-27 18:11 UTCEG score recompute
  59. 2026-08-27 18:11 UTCGHSA enrichment
  60. 2026-08-27 14:25 UTCEPSS rescore
  61. 2026-08-27 05:10 UTCGHSA enrichment
  62. 2026-08-26 16:44 UTCGHSA enrichment
  63. 2026-08-26 15:13 UTCEG score recompute
  64. 2026-08-26 15:13 UTCGHSA enrichment
  65. 2026-08-26 14:47 UTCEPSS rescore
  66. 2026-08-26 02:47 UTCGHSA enrichment
  67. 2026-08-25 14:21 UTCEG score recompute
  68. 2026-08-25 14:21 UTCGHSA enrichment
  69. 2026-08-25 14:20 UTCNVD updateCVSS v4 → 5.5
  70. 2026-08-25 13:49 UTCEPSS rescore
  71. 2026-08-25 13:36 UTCEG score recompute
  72. 2026-08-25 13:36 UTCGHSA enrichment
  73. 2026-08-25 13:35 UTCMITRE cvelistV5CVSS v4 → 6.9
  74. 2026-08-25 06:28 UTCEG score recompute
  75. 2026-08-25 06:26 UTCNVD updateCVSS v4 → 5.5

Related CVEs(same CWE)

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 in the National Vulnerability Database on August 25, 2026, with the most recent update on August 26, 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% probability of exploitation in the next 30 days, which ranks it in the top 64.4% of all scored CVEs.
What is the CVSS score of CVE-2026-78654?
CVE-2026-78654 has a CVSS v3 base score of 7.3 (NVD).
How do I remediate CVE-2026-78654?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-78654, 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.

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