CVE-2026-76833

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM 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 mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.8Exploit: Elevated riskExposed services: Not assessed

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

@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
7.8HIGHmedium confidence
EG Risk
51
EG Risk 51/100CISA 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
Severity78% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low, Track* at medium and Attend at high mission impact.
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
0.2%
EPSS %ILE
11th
KEV
Not listed

CISA SSVCTrack at low, Track* at medium and Attend at high mission impact.

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 no (CISA Vulnrichment) · Technical impact total (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 20, 2026

Last Modified

September 24, 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 22× in last 7d / 97× 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 162 total refreshes for this CVE.

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

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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 on August 20, 2026, with the most recent update on September 24, 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 0.2% probability of exploitation in the next 30 days (11th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-76833?
CVE-2026-76833 has a CVSS base score of 7.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-76833?
No fix for CVE-2026-76833 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-2026-76833 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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