CVE-2026-29063

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 76% of all CVEs by exploit prediction. 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, nvd
Trending — 4 sources updated this week
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.8Exploit: NoneExposed: 0

A fix is available — apply it.

Immutable.js provides many Persistent Immutable data structures. Prior to versions 3.8.3, 4.3.7, and 5.1.5, Prototype Pollution is possible in immutable via the mergeDeep(), mergeDeepWith(), merge(), Map.toJS(), and Map.toObject() APIs. This issue has been patched in versions 3.8.3, 4.3.7, and 5.1.5.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
58.5%
KEV
Not listed

Published

March 6, 2026

Last Modified

July 21, 2026

Advisory Details (10)

Auto-updated Jul 20, 2026
🔬 Proof of concept available. Patch available. Sources: redhat, github_release, github.
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:12118
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:11916
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:11858
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:11414
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:11217
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:11070
github Patch Available🟡 PoC Available

Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in immutable · Advisory · immutable-js/immutable-js · GitHub

https://github.com/immutable-js/immutable-js/security/advisories/GHSA-wf6x-7x77-mvgw
github_release Patch Available

v5.1.5

Patch available: immutable-js/immutable-js v5.1.5

https://github.com/immutable-js/immutable-js/releases/tag/v5.1.5
github_release Patch Available

v4.3.8

Patch available: immutable-js/immutable-js v4.3.8

https://github.com/immutable-js/immutable-js/releases/tag/v4.3.8
github_release Patch Available

v3.8.3

Patch available: immutable-js/immutable-js v3.8.3

https://github.com/immutable-js/immutable-js/releases/tag/v3.8.3

Vendor Advisories for CVE-2026-29063(20)

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

Patch Availability(30)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatrhoai/odh-mod-arch-model-registry-rhel9:17804671472026-06-10redhat
redhatopenshift4/ose-monitoring-plugin-rhel9:17805038462026-06-10redhat
redhatnetwork-observability/network-observability-console-plugin-pf4-rhel9:17809209792026-06-08redhat
redhatopenshift4/nmstate-console-plugin-rhel9:17798749672026-06-03redhat
redhatopenshift4/ose-monitoring-plugin-rhel9:17798639392026-06-03redhat
redhatopenshift4/ose-monitoring-plugin-rhel9:17798748912026-06-03redhat
redhatquay/quay-rhel9:17799222052026-06-02redhat
redhatopenshift-pipelines/pipelines-console-plugin-rhel9:17799102012026-05-29redhat
redhatopenshift4/ose-networking-console-plugin-rhel9:17786152762026-05-29redhat
redhatopenshift4/ose-networking-console-plugin-rhel9:17792563222026-05-27redhat
redhatopenshift4/nmstate-console-plugin-rhel9:17792499202026-05-27redhat
redhatopenshift4/ose-monitoring-plugin-rhel9:17792660062026-05-26redhat
redhatrhoai/odh-mod-arch-model-registry-rhel9:17786669872026-05-20redhat
redhatopenshift4/nmstate-console-plugin-rhel9:17786450082026-05-20redhat
redhatopenshift4/ose-networking-console-plugin-rhel9:17785171092026-05-20redhat
redhatmigration-toolkit-virtualization/mtv-console-plugin-rhel9:17789274622026-05-19redhat
redhatmigration-toolkit-virtualization/mtv-console-plugin-rhel9:17791398722026-05-19redhat
redhatquay/quay-rhel9:17792040862026-05-19redhat
redhatopenshift4/ose-networking-console-plugin-rhel9:17774592112026-05-06redhat
redhatrhacm2/console-rhel9:17775593872026-05-05redhat
redhatrhdh/rhdh-hub-rhel9:17779032622026-05-05redhat
redhatmulticluster-engine/console-mce-rhel9:17775593922026-05-05redhat
redhatadvanced-cluster-security/rhacs-main-rhel8:17779764892026-05-05redhat
redhatadvanced-cluster-security/rhacs-main-rhel8:17779866302026-05-05redhat
redhatrhacm2/console-rhel9:17769271262026-05-04redhat
redhatmulticluster-engine/console-mce-rhel9:17771287902026-05-04redhat
redhatquay/quay-rhel8:17767369102026-04-29redhat
redhatmulticluster-engine/console-mce-rhel9:17773062262026-04-29redhat
redhatmulticluster-engine/console-mce-rhel9:17773014442026-04-28redhat
redhatadvanced-cluster-security/rhacs-main-rhel8:17773077912026-04-27redhat

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 rangeFixed inDependents
immutable—3.8.3—

Weakness Classification(2)

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

All Vendor Advisories

(25)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 16× in last 7d / 55× 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 139 total refreshes for this CVE.

  1. 2026-07-22 14:08 UTCEPSS rescore
  2. 2026-07-22 14:08 UTCEPSS rescore
  3. 2026-07-21 15:24 UTCEPSS rescore
  4. 2026-07-21 15:24 UTCEPSS rescore
  5. 2026-07-20 17:08 UTCEPSS rescore
  6. 2026-07-20 17:08 UTCEPSS rescore
  7. 2026-07-19 14:31 UTCEPSS rescore
  8. 2026-07-19 14:31 UTCEPSS rescore
  9. 2026-07-19 02:29 UTCEPSS rescore
  10. 2026-07-18 10:04 UTCEPSS rescore
  11. 2026-07-18 10:04 UTCEPSS rescore
  12. 2026-07-17 15:29 UTCOSV refresh
  13. 2026-07-16 17:03 UTCEPSS rescore
  14. 2026-07-16 17:03 UTCEPSS rescore
  15. 2026-07-16 12:29 UTCNVD updateCVSS v3 → 9.8 · severity → CRITICAL
  16. 2026-07-16 12:08 UTCMITRE cvelistV5CVSS v3 → 8.8 · severity → HIGH
  17. 2026-07-15 16:57 UTCEPSS rescore
  18. 2026-07-15 16:57 UTCEPSS rescore
  19. 2026-07-15 02:22 UTCNVD updateCVSS v3 → 9.8 · severity → CRITICAL
  20. 2026-07-15 02:00 UTCEPSS rescore
  21. 2026-07-15 02:00 UTCEPSS rescore
  22. 2026-07-15 01:21 UTCMITRE cvelistV5CVSS v3 → 8.8 · severity → HIGH
  23. 2026-07-13 22:30 UTCEPSS rescore
  24. 2026-07-13 06:13 UTCEPSS rescore
  25. 2026-07-13 06:13 UTCEPSS rescore
Show 75 more
  1. 2026-07-12 05:46 UTCEPSS rescore
  2. 2026-07-11 08:27 UTCEPSS rescore
  3. 2026-07-10 12:26 UTCNVD updateCVSS v3 → 9.8 · severity → CRITICAL
  4. 2026-07-10 12:12 UTCMITRE cvelistV5CVSS v3 → 8.8 · severity → HIGH
  5. 2026-07-09 19:10 UTCEPSS rescore
  6. 2026-07-09 13:52 UTCNVD updateCVSS v3 → 9.8 · severity → CRITICAL
  7. 2026-07-09 12:25 UTCMITRE cvelistV5CVSS v3 → 8.8 · severity → HIGH
  8. 2026-07-08 15:15 UTCEPSS rescore
  9. 2026-07-07 13:46 UTCEPSS rescore
  10. 2026-07-06 16:27 UTCEPSS rescore
  11. 2026-07-06 16:27 UTCEPSS rescore
  12. 2026-07-06 02:23 UTCEPSS rescore
  13. 2026-07-06 02:23 UTCEPSS rescore
  14. 2026-07-05 02:30 UTCEPSS rescore
  15. 2026-07-04 06:31 UTCEPSS rescore
  16. 2026-07-01 15:06 UTCEPSS rescore
  17. 2026-06-30 23:22 UTCEPSS rescore
  18. 2026-06-29 14:06 UTCEPSS rescore
  19. 2026-06-29 13:32 UTCOSV refresh
  20. 2026-06-28 14:07 UTCEPSS rescore
  21. 2026-06-28 14:07 UTCEPSS rescore
  22. 2026-06-28 04:56 UTCEPSS rescore
  23. 2026-06-28 04:56 UTCEPSS rescore
  24. 2026-06-27 03:08 UTCEPSS rescore
  25. 2026-06-25 13:49 UTCEPSS rescore
  26. 2026-06-25 13:49 UTCEPSS rescore
  27. 2026-06-24 14:05 UTCEPSS rescore
  28. 2026-06-24 14:05 UTCEPSS rescore
  29. 2026-06-23 21:33 UTCEPSS rescore
  30. 2026-06-23 21:32 UTCEPSS rescore
  31. 2026-06-22 14:25 UTCEPSS rescore
  32. 2026-06-22 14:25 UTCEPSS rescore
  33. 2026-06-21 14:56 UTCEPSS rescore
  34. 2026-06-21 14:56 UTCEPSS rescore
  35. 2026-06-21 01:59 UTCEPSS rescore
  36. 2026-06-21 01:59 UTCEPSS rescore
  37. 2026-06-19 19:25 UTCEPSS rescore
  38. 2026-06-19 19:25 UTCEPSS rescore
  39. 2026-06-18 17:52 UTCEPSS rescore
  40. 2026-06-17 17:53 UTCEPSS rescore
  41. 2026-06-17 17:53 UTCEPSS rescore
  42. 2026-06-16 17:52 UTCEPSS rescore
  43. 2026-06-15 17:48 UTCEPSS rescore
  44. 2026-06-14 23:18 UTCEPSS rescore
  45. 2026-06-13 23:00 UTCEPSS rescore
  46. 2026-06-12 23:12 UTCEPSS rescore
  47. 2026-06-12 23:12 UTCEPSS rescore
  48. 2026-06-12 04:24 UTCVendor advisory
  49. 2026-06-12 00:36 UTCVendor advisory
  50. 2026-06-11 14:00 UTCEPSS rescore
  51. 2026-06-10 22:28 UTCVendor advisory
  52. 2026-06-10 22:18 UTCEPSS rescore
  53. 2026-06-10 22:18 UTCEPSS rescore
  54. 2026-06-10 18:47 UTCVendor advisory
  55. 2026-06-10 13:22 UTCEPSS rescore
  56. 2026-06-10 10:06 UTCVendor advisory
  57. 2026-06-10 06:22 UTCVendor advisory
  58. 2026-06-10 01:55 UTCVendor advisory
  59. 2026-06-09 17:38 UTCVendor advisory
  60. 2026-06-08 14:17 UTCEPSS rescore
  61. 2026-06-08 14:17 UTCEPSS rescore
  62. 2026-06-08 06:18 UTCVendor advisory
  63. 2026-06-08 02:31 UTCVendor advisory
  64. 2026-06-07 22:51 UTCVendor advisory
  65. 2026-06-07 19:11 UTCVendor advisory
  66. 2026-06-07 15:25 UTCEPSS rescore
  67. 2026-06-07 15:25 UTCEPSS rescore
  68. 2026-06-07 15:25 UTCEPSS rescore
  69. 2026-06-07 15:24 UTCVendor advisory
  70. 2026-06-06 13:47 UTCEPSS rescore
  71. 2026-06-06 13:47 UTCEPSS rescore
  72. 2026-06-05 22:47 UTCEPSS rescore
  73. 2026-06-05 22:47 UTCEPSS rescore
  74. 2026-06-05 06:10 UTCEPSS rescore
  75. 2026-06-05 06:10 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-29063?
CVE-2026-29063 is a critical vulnerability published on March 6, 2026. Immutable.js provides many Persistent Immutable data structures. Prior to versions 3.8.3, 4.3.7, and 5.1.5, Prototype Pollution is possible in immutable via the mergeDeep(), mergeDeepWith(), merge(), Map.toJS(), and Map.toObject() APIs. This issue has been patched in versions 3.8.3, 4.3.7, and…
When was CVE-2026-29063 disclosed?
CVE-2026-29063 was first published in the National Vulnerability Database on March 6, 2026, with the most recent update on July 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-29063 actively exploited?
CVE-2026-29063 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 58.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-29063?
CVE-2026-29063 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-29063?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-29063, 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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