CVE-2026-29063

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 1.0%, top 40% 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
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.6%CVSS: 9.8Exploit: None knownExposed services: Not assessed

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
9.8CRITICALmedium confidence
EG Risk
59
EG Risk 59/100

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
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
EPSS PROB
1.6%
EPSS %ILE
75th
KEV
Not listed

Published

March 6, 2026

Last Modified

September 10, 2026

Advisory Details (10)

Auto-updated Oct 8, 2026
🔬 Proof of concept available. Patch available. Sources: github_release, github, redhat.
redhatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:12118
redhatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:11916
redhatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:11858
redhatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:11414
redhatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:11217
redhatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:11070
githubMentions a patch (unverified)🟡 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 / EcosystemFix (by version range) / PatchReleasedSource
redhatopenshift4/ose-console:17840558342026-07-23redhat
redhatodf4/rook-ceph-rhel9-operator:17836853752026-07-20redhat
redhatodf4/rook-ceph-rhel9-operator:17836775332026-07-20redhat
redhatrhmtc/openshift-migration-ui-rhel8:17836905322026-07-20redhat
redhatodf4/rook-ceph-rhel9-operator:17836692192026-07-16redhat
redhatopenshift4/ose-console-rhel9:17833067152026-07-16redhat
redhatrhem/flightctl-ui-rhel10:17841945742026-07-16redhat
redhatrhem/flightctl-ui-rhel9:17841277362026-07-15redhat
redhatopenshift4/nmstate-console-plugin-rhel9:17822697942026-07-09redhat
redhatopenshift4/ose-console:17822765342026-07-09redhat
redhatopenshift4/ose-monitoring-plugin-rhel9:17822403322026-07-09redhat
redhatrhacm2/console-rhel9:17834517292026-07-08redhat
redhatrhem/flightctl-ui-rhel9:17835024382026-07-08redhat
redhatopenshift4/ose-console-rhel9:17821716762026-07-02redhat
redhatcluster-observability-operator/troubleshooting-panel-console-plugin-pf6-rhel9:17828399962026-07-01redhat
redhatopenshift4/ose-console-rhel9:17822595882026-07-01redhat
redhatopenshift4/ose-console:17821574142026-07-01redhat
redhatopenshift4/ose-console:17821270912026-07-01redhat
redhatopenshift4/ose-console-rhel9:17816887432026-06-23redhat
redhatsatellite/iop-vulnerability-frontend-rhel9:17810324952026-06-16redhat
redhatsatellite/iop-host-inventory-frontend-rhel9:17801051792026-06-16redhat
redhatopenshift4/ose-monitoring-plugin-rhel9:17805038462026-06-10redhat
redhatrhoai/odh-mod-arch-model-registry-rhel9:17804671472026-06-10redhat
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

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

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
node-immutable3.8.2+dfsg-3 ... 4.3.8-2 (11 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
node-immutable4.1.0-3, 4.3.4-1, 4.3.8-1, 4.3.8-2, 4.3.9-1
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
node-immutable4.3.4-1, 4.3.8-1, 4.3.8-2, 4.3.9-1
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
node-immutable4.3.4-1
  • every version up to 4.3.8-1: fixed in 4.3.8-1
—
npm(1)
PackageVulnerable rangeFix by version rangeDependents
immutable—
  • 4.0.0-rc.1 up to 4.3.8: fixed in 4.3.8
  • 5.0.0 up to 5.1.5: fixed in 5.1.5
  • every version up to 3.8.3: fixed in 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 7× in last 7d / 24× 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 318 total refreshes for this CVE.

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

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

Same product

2 shown

Debian:11:node-immutable

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 on March 6, 2026, with the most recent update on September 10, 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 1.6% probability of exploitation in the next 30 days (75th percentile of EPSS-scored CVEs).
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?
A fix for CVE-2026-29063 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-29063 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-29063

Explore →

Is Your Infrastructure Affected by CVE-2026-29063?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs