CVE-2020-3946

HIGHNVD 7.57.5—

7.5

InstallBuilder AutoUpdate tool and regular installers enabling built with versions earlier than 19.11 are vulnerable to Billion laughs attack (denial-of-service).

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 55.0%
KEV: Not listed

Published

April 20, 2020

Last Modified

November 21, 2024

References (2)

security@vmwarehttps://blog.installbuilder.com/2019/12/configure-autoupdate-project-settings.html
af854a3a-2127-422b-91ae-364da2661108https://blog.installbuilder.com/2019/12/configure-autoupdate-project-settings.html

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 8× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 04:33 UTCEG score recompute
2026-05-27 04:33 UTCGHSA enrichment
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch

Frequently asked(5)

What is CVE-2020-3946?

CVE-2020-3946 is a high vulnerability published on April 20, 2020. InstallBuilder AutoUpdate tool and regular installers enabling <checkForUpdates> built with versions earlier than 19.11 are vulnerable to Billion laughs attack (denial-of-service).

When was CVE-2020-3946 disclosed?

CVE-2020-3946 was first published in the National Vulnerability Database on April 20, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2020-3946 actively exploited?

CVE-2020-3946 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 55.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2020-3946?

CVE-2020-3946 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2020-3946?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-3946, 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-2020-3946

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CVE-2020-3946

📅 Published

🔄 Last Modified

🔗 References (2)