CVE-2026-77415

CRITICALPre-NVD 9.39.3—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.9% (58th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — Patch released this weekElevated
9.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.9%CVSS: 9.3Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

JSONata is a JSON query and transformation language. Prior to 1.8.8 and 2.2.1, crafted JSONata expressions could chain several object-integrity weaknesses to execute arbitrary code. The chain could overwrite $clone to mutate objects through evaluateTransformExpression, expose and deconstruct JSONata functions or lambdas through $merge.*, replace proc.arguments.forEach used by applyProcedure, and forge internal lambda state. These primitives allowed an attacker to reach prototype getters, prototype and constructor access, and process.getBuiltinModule with child_process, executing code with the privileges of the host process. This issue is fixed in versions 1.8.8 and 2.2.1.

CVSS v3
9.3
EG Score
9.3CRITICALmedium confidence
EG Risk
73
EG Risk 73/100CISA 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
Severity93% × 45%
Exploitation40% × 40%
Automatability100% × 15%
CISA SSVC: Track at low, Track* at medium and Attend at high mission impact.
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
0.9%
EPSS %ILE
58th
KEV
Not listed

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

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 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 21, 2026

Last Modified

September 9, 2026

Advisory Details (10)

Auto-updated Oct 3, 2026
Patch available. Sources: github_release, github_commit, github_pr.
github_release Patch Available

2.2.1 Maintenance Release

Patch available: jsonata-js/jsonata v2.2.1

https://github.com/jsonata-js/jsonata/releases/tag/v2.2.1
github_release Patch Available

1.8.8 Security Release

Patch available: jsonata-js/jsonata v1.8.8

https://github.com/jsonata-js/jsonata/releases/tag/v1.8.8
github_pr Patch Available

Prevent object contructor setting internal flags

Patch available: jsonata-js/jsonata v2.2.1 (PR #802 merged 2026-05-19)

https://github.com/jsonata-js/jsonata/pull/802
github_pr Patch Available

Wildcards should not unwrap function objects

Patch available: jsonata-js/jsonata v2.2.1 (PR #800 merged 2026-05-19)

https://github.com/jsonata-js/jsonata/pull/800
github_pr Patch Available

Prevent object prototype pollution

Patch available: jsonata-js/jsonata v2.2.1 (PR #799 merged 2026-05-19)

https://github.com/jsonata-js/jsonata/pull/799
github_commit Patch Available

commit f174348c7fa3 (jsonata-js/jsonata)

Patch available: jsonata-js/jsonata v2.2.1 (contains commit f174348c7fa3)

https://github.com/jsonata-js/jsonata/commit/f174348c7fa30f271b63ddedf0767e814004bc4d
github_commit Patch Available

commit f09df8416eab (jsonata-js/jsonata)

Patch available: jsonata-js/jsonata v1.8.8 (contains commit f09df8416eab)

https://github.com/jsonata-js/jsonata/commit/f09df8416eab8ff44926fc6527c80fb8701de159
github_commit Patch Available

commit 59e25144fc3b (jsonata-js/jsonata)

Patch available: jsonata-js/jsonata v2.2.1 (contains commit 59e25144fc3b)

https://github.com/jsonata-js/jsonata/commit/59e25144fc3b7125f6befd71b8a6e14e1fa610d2
github_commit Patch Available

commit 4b217d514376 (jsonata-js/jsonata)

Patch available: jsonata-js/jsonata v1.8.8 (contains commit 4b217d514376)

https://github.com/jsonata-js/jsonata/commit/4b217d514376e30cba278941298d7ba97c4a6c6e
github_commit Patch Available

commit 47c0e5854220 (jsonata-js/jsonata)

Patch available: jsonata-js/jsonata v2.2.1 (contains commit 47c0e5854220)

https://github.com/jsonata-js/jsonata/commit/47c0e58542202c705726663166dbee5fcae47d06

Vendor Advisories for CVE-2026-77415(2)

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

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatrhdh/red-hat-developer-hub-backstage-plugin-orchestrator-form-widgets:17912507942026-10-06redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFix by version rangeDependents
jsonata—
  • 2.0.0 up to 2.2.1: fixed in 2.2.1
  • every version up to 1.8.8: fixed in 1.8.8
—

Weakness Classification(1)

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

Data Freshness Timeline

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

Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-77415?
CVE-2026-77415 is a critical vulnerability published on August 21, 2026. JSONata is a JSON query and transformation language. Prior to 1.8.8 and 2.2.1, crafted JSONata expressions could chain several object-integrity weaknesses to execute arbitrary code. The chain could overwrite $clone to mutate objects through evaluateTransformExpression, expose and deconstruct…
When was CVE-2026-77415 disclosed?
CVE-2026-77415 was first published on August 21, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-77415 actively exploited?
CVE-2026-77415 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.9% probability of exploitation in the next 30 days (58th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-77415?
CVE-2026-77415 has a CVSS base score of 9.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-77415?
A fix for CVE-2026-77415 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-77415 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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