CVE-2026-76833

HIGHPre-NVD 7.87.8—
EchelonGraph scoreHIGH confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-20. a secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: Elevated riskExposed: 0

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

@cgauge/yaml npm package contains an arbitrary code execution vulnerability that allows attackers to execute arbitrary JavaScript by embedding a custom !js YAML tag whose construct callback unconditionally calls eval() on attacker-supplied string values during document parsing. Any application parsing untrusted YAML input with this library exposes full Node.js runtime authority, including environment variable access, filesystem read/write, network access, and subprocess execution, with no safe-mode alternative or opt-out mechanism available.

CVSS v3
7.8
EG Score
7.8(high)
EG Risk
51(Track*)
EG Risk 51/100SSVC: Track*

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
Severity78% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
5%
KEV
Not listed

Published

August 20, 2026

Last Modified

August 20, 2026

Advisory Details (3)

Auto-updated Aug 20, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

@cgauge/yaml npm Package Arbitrary Code Execution via eval() YAML Tag | Advisories | VulnCheck

https://www.vulncheck.com/advisories/cgauge-yaml-npm-package-arbitrary-code-execution-via-eval-yaml-tag
generic🟡 PoC Available

cgauge-yaml-disclosure.md · GitHub

https://gist.github.com/arjunjaincs/35da3a80b4b16f324f194acec18489ba
generic

GitHub - cgauge/packages: CustomerGauge Packages · GitHub

https://github.com/cgauge/packages

Vendor Advisories for CVE-2026-76833(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 21× in last 7d / 108× 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 108 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-76833?
CVE-2026-76833 is a high vulnerability published on August 20, 2026. @cgauge/yaml npm package contains an arbitrary code execution vulnerability that allows attackers to execute arbitrary JavaScript by embedding a custom !js YAML tag whose construct callback unconditionally calls eval() on attacker-supplied string values during document parsing. Any application…
When was CVE-2026-76833 disclosed?
CVE-2026-76833 was first published in the National Vulnerability Database on August 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-76833 actively exploited?
CVE-2026-76833 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 95.3% of all scored CVEs.
What is the CVSS score of CVE-2026-76833?
CVE-2026-76833 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-76833?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-76833, 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.

Dependency Blast Radius

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