CVE-2026-4800

CRITICALNVD 9.88.1▼
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.1 under NVD CVSS v3. EPSS exploit probability: 0.0%, top 85% 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 — 3 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: 2%CVSS: 9.8Exploit: NoneExposed: 0

A fix is available — apply it.

Impact:

The fix for CVE-2021-23337 (https://github.com/advisories/GHSA-35jh-r3h4-6jhm) added validation for the variable option in _.template but did not apply the same validation to options.imports key names. Both paths flow into the same Function() constructor sink.

When an application passes untrusted input as options.imports key names, an attacker can inject default-parameter expressions that execute arbitrary code at template compilation time.

Additionally, _.template uses assignInWith to merge imports, which enumerates inherited properties via for..in. If Object.prototype has been polluted by any other vector, the polluted keys are copied into the imports object and passed to Function().

Patches:

Users should upgrade to version 4.18.0.

Workarounds:

Do not pass untrusted input as key names in options.imports. Only use developer-controlled, static key names.

CVSS v3
9.8
EG Score
8.1(medium)
EPSS
75.0%
KEV
Not listed

Published

March 31, 2026

Last Modified

July 10, 2026

Advisory Details (10)

Auto-updated Jul 11, 2026
Patch available. Sources: github, github_commit, redhat.
redhat Patch Available

Affected: Red Hat Enterprise Linux 10.0 Extended Update Support.

https://access.redhat.com/errata/RHSA-2026:11470
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions.

https://access.redhat.com/errata/RHSA-2026:11469
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions.

https://access.redhat.com/errata/RHSA-2026:11454
redhat Patch Available

Affected: Red Hat Enterprise Linux 10.

https://access.redhat.com/errata/RHSA-2026:10713
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.

https://access.redhat.com/errata/RHSA-2026:10710
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:10175
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:10131
github_commit Patch Available

commit 3469357cff39 (lodash/lodash)

Patch available: lodash/lodash 4.18.0 (contains commit 3469357cff39)

https://github.com/lodash/lodash/commit/3469357cff396a26c363f8c1b5a91dde28ba4b1c
github Patch Available

Command Injection in lodash · CVE-2021-23337 · GitHub Advisory Database · GitHub

https://github.com/advisories/GHSA-35jh-r3h4-6jhm
generic

Security Advisories | OpenJS Foundation CVE Numbering Authority

https://cna.openjsf.org/security-advisories.html

Vendor Advisories for CVE-2026-4800(20)

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

Patch Availability(29)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatrhoai/odh-mod-arch-model-registry-rhel9:17804671472026-06-10redhat
redhatautomation-platform-ui-0:2.6.9-1.el9ap2026-06-09redhat
redhatcockpit-image-builder-0:94.3-1.el10_22026-06-08redhat
redhatopenshift4/nmstate-console-plugin-rhel9:17798749672026-06-03redhat
redhatlodash2026-06-02redhat
redhatopenshift4/ose-networking-console-plugin-rhel9:17792563222026-05-27redhat
redhatopenshift4/nmstate-console-plugin-rhel9:17792499202026-05-27redhat
redhatcryostat/cryostat-rhel9:4.2.0-92026-05-26redhat
redhatopenshift-gitops-1/console-plugin-rhel8:17791155452026-05-26redhat
redhatopenshift-gitops-1/console-plugin-rhel8:17792105302026-05-26redhat
redhatopenshift4/nmstate-console-plugin-rhel9:17786450082026-05-20redhat
redhatopenshift4/ose-networking-console-plugin-rhel9:17785171092026-05-20redhat
redhatrhoai/odh-mod-arch-model-registry-rhel9:17786669872026-05-20redhat
redhatopenshift4/ose-networking-console-plugin-rhel9:17782562872026-05-20redhat
redhatopenshift4/ose-networking-console-plugin-rhel9:17786448582026-05-20redhat
redhatpcs-0:0.11.11-2.el9_8.12026-05-19redhat
redhatmigration-toolkit-virtualization/mtv-console-plugin-rhel9:17789274622026-05-19redhat
redhatmigration-toolkit-virtualization/mtv-console-plugin-rhel9:17791398722026-05-19redhat
redhatpcs-0:0.12.2-3.el10_2.12026-05-19redhat
redhatodf4/rook-ceph-rhel9-operator:17780778392026-05-14redhat
redhatodf4/rook-ceph-rhel9-operator:17780460792026-05-14redhat
redhatodf4/rook-ceph-rhel9-operator:17780504822026-05-14redhat
redhatnetwork-observability/network-observability-console-plugin-rhel9:17785104612026-05-13redhat
redhatsatellite/iop-host-inventory-frontend-rhel9:17774988062026-05-07redhat
redhatsatellite/iop-advisor-frontend-rhel9:17779115352026-05-07redhat
redhatrhdh/rhdh-hub-rhel9:17779032622026-05-05redhat
redhatansible-automation-platform-25/lightspeed-rhel8:17774038722026-05-04redhat
redhatansible-automation-platform-26/lightspeed-rhel9:17773872422026-05-04redhat
redhatodf4/rook-ceph-rhel9-operator:17760797742026-04-30redhat

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

(4 across 1 ecosystem)
npm(4)
PackageVulnerable rangeFixed inDependents
lodash—4.18.0—
lodash-amd—4.18.0—
lodash-es—4.18.0—
lodash.template—4.18.0—

Weakness Classification(1)

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

Additional Vendor Advisories

(22)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 12× in last 7d / 44× 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.

  1. 2026-07-11 08:27 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 → 8.1 · 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 → 8.1 · severity → HIGH
  8. 2026-07-08 15:16 UTCEPSS rescore
  9. 2026-07-07 13:46 UTCEPSS rescore
  10. 2026-07-06 16:27 UTCEPSS rescore
  11. 2026-07-06 02:23 UTCEPSS rescore
  12. 2026-07-05 02:30 UTCEPSS rescore
  13. 2026-07-04 06:31 UTCEPSS rescore
  14. 2026-07-01 15:07 UTCEPSS rescore
  15. 2026-06-30 23:22 UTCEPSS rescore
  16. 2026-06-30 04:32 UTCNVD updateCVSS v3 → 9.8 · severity → CRITICAL
  17. 2026-06-29 14:06 UTCEPSS rescore
  18. 2026-06-29 14:06 UTCEPSS rescore
  19. 2026-06-28 14:07 UTCEPSS rescore
  20. 2026-06-28 04:56 UTCEPSS rescore
  21. 2026-06-28 04:56 UTCEPSS rescore
  22. 2026-06-27 03:08 UTCEPSS rescore
  23. 2026-06-25 13:49 UTCEPSS rescore
  24. 2026-06-24 14:05 UTCEPSS rescore
  25. 2026-06-23 21:33 UTCEPSS rescore
Show 68 more
  1. 2026-06-23 21:33 UTCEPSS rescore
  2. 2026-06-22 14:25 UTCEPSS rescore
  3. 2026-06-22 14:25 UTCEPSS rescore
  4. 2026-06-21 14:56 UTCEPSS rescore
  5. 2026-06-21 14:56 UTCEPSS rescore
  6. 2026-06-21 01:59 UTCEPSS rescore
  7. 2026-06-21 01:59 UTCEPSS rescore
  8. 2026-06-19 19:26 UTCEPSS rescore
  9. 2026-06-19 19:26 UTCEPSS rescore
  10. 2026-06-18 17:52 UTCEPSS rescore
  11. 2026-06-18 17:52 UTCEPSS rescore
  12. 2026-06-17 17:53 UTCEPSS rescore
  13. 2026-06-16 17:53 UTCEPSS rescore
  14. 2026-06-15 17:49 UTCEPSS rescore
  15. 2026-06-15 17:49 UTCEPSS rescore
  16. 2026-06-14 23:18 UTCEPSS rescore
  17. 2026-06-13 23:00 UTCEPSS rescore
  18. 2026-06-12 23:12 UTCEPSS rescore
  19. 2026-06-12 23:12 UTCEPSS rescore
  20. 2026-06-11 22:35 UTCEG score recompute
  21. 2026-06-11 22:35 UTCVendor advisory
  22. 2026-06-11 14:00 UTCEPSS rescore
  23. 2026-06-10 22:19 UTCEPSS rescore
  24. 2026-06-10 14:26 UTCEG score recompute
  25. 2026-06-10 14:26 UTCVendor advisory
  26. 2026-06-10 13:22 UTCEPSS rescore
  27. 2026-06-10 02:19 UTCEG score recompute
  28. 2026-06-10 02:19 UTCVendor advisory
  29. 2026-06-09 15:00 UTCEG score recompute
  30. 2026-06-09 15:00 UTCVendor advisory
  31. 2026-06-08 14:17 UTCEPSS rescore
  32. 2026-06-08 14:17 UTCEPSS rescore
  33. 2026-06-08 12:55 UTCEG score recompute
  34. 2026-06-08 12:55 UTCVendor advisory
  35. 2026-06-07 22:49 UTCEG score recompute
  36. 2026-06-07 22:49 UTCVendor advisory
  37. 2026-06-07 15:25 UTCEPSS rescore
  38. 2026-06-07 15:25 UTCEPSS rescore
  39. 2026-06-07 11:28 UTCEG score recompute
  40. 2026-06-07 11:28 UTCVendor advisory
  41. 2026-06-06 13:47 UTCEPSS rescore
  42. 2026-06-06 13:47 UTCEPSS rescore
  43. 2026-06-05 22:47 UTCEPSS rescore
  44. 2026-06-05 06:10 UTCEPSS rescore
  45. 2026-06-05 06:10 UTCEPSS rescore
  46. 2026-06-04 13:12 UTCEPSS rescore
  47. 2026-06-04 13:12 UTCEPSS rescore
  48. 2026-06-02 20:13 UTCEPSS rescore
  49. 2026-06-01 13:52 UTCEPSS rescore
  50. 2026-06-01 13:52 UTCEPSS rescore
  51. 2026-05-31 22:30 UTCEPSS rescore
  52. 2026-05-31 22:30 UTCEPSS rescore
  53. 2026-05-31 00:16 UTCEPSS rescore
  54. 2026-05-31 00:16 UTCEPSS rescore
  55. 2026-05-29 13:44 UTCEPSS rescore
  56. 2026-05-29 13:44 UTCEPSS rescore
  57. 2026-05-28 13:44 UTCEPSS rescore
  58. 2026-05-28 13:44 UTCEPSS rescore
  59. 2026-05-27 13:40 UTCEPSS rescore
  60. 2026-05-27 13:40 UTCEPSS rescore
  61. 2026-05-26 13:44 UTCEPSS rescore
  62. 2026-05-26 07:18 UTCEPSS rescore
  63. 2026-05-23 00:08 UTCEG score recompute
  64. 2026-05-21 22:43 UTCEPSS rescore
  65. 2026-05-20 22:38 UTCEPSS rescore
  66. 2026-05-20 19:44 UTCEG score recompute
  67. 2026-05-20 19:44 UTCVendor advisory
  68. 2026-05-20 11:22 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-4800?
CVE-2026-4800 is a critical vulnerability published on March 31, 2026. Impact: The fix for CVE-2021-23337 (https://github.com/advisories/GHSA-35jh-r3h4-6jhm) added validation for the variable option in _.template but did not apply the same validation to options.imports key names. Both paths flow into the same Function() constructor sink. When an application passes…
When was CVE-2026-4800 disclosed?
CVE-2026-4800 was first published in the National Vulnerability Database on March 31, 2026, with the most recent update on July 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-4800 actively exploited?
CVE-2026-4800 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 75.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-4800?
CVE-2026-4800 has a CVSS v3 base score of 9.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 8.1.
How do I remediate CVE-2026-4800?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-4800, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-4800

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