RCE in Lodash
CVE-2026-4800
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 sam…
Vulnerability class: RCE (Remote Code Execution)
EPSS: 0.000 (14.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Lodash — versions 4.0.0, 4.18.0
- Lodash Lodash-amd — versions 4.0.0, 4.18.0
- Lodash Lodash-es — versions 4.0.0, 4.18.0
- Lodash Lodash.template — versions 4.0.0, 4.18.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- ce714d77-add3-4f53-aff5-83d477b104bb (Not Applicable)
- ce714d77-add3-4f53-aff5-83d477b104bb (Not Applicable)
- ce714d77-add3-4f53-aff5-83d477b104bb (Third Party Advisory)
Frequently asked questions
- What is CVE-2026-4800?
- CVE-2026-4800 is a high-severity vulnerability in Lodash, classified under Code Injection. CVSS score: 8.1/10. Published 2026-03-31.
- How severe is CVE-2026-4800?
- High severity. CVSS v3 base score is 8.1 out of 10.
- Is CVE-2026-4800 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.