CVE-2020-7767

MEDIUMNVD 5.35.3—

5.3

All versions of package express-validators are vulnerable to Regular Expression Denial of Service (ReDoS) when validating specifically-crafted invalid urls.

CVSS v3: 5.3
EG Score: 5.3(medium)
EPSS: 58.6%
KEV: Not listed

Published

November 11, 2020

Last Modified

November 21, 2024

References (2)

report@snykhttps://snyk.io/vuln/SNYK-JS-EXPRESSVALIDATORS-1017404
af854a3a-2127-422b-91ae-364da2661108https://snyk.io/vuln/SNYK-JS-EXPRESSVALIDATORS-1017404

Patch Availability(1)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
npm	express-validators	—	ghsa

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)

Package	Vulnerable range	Fixed in	Dependents
express-validators	—	—	—

Weakness Classification(1)

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

CWE-400Uncontrolled Resource Consumption (Denial of Service)

Data Freshness Timeline

(refreshed 10× in last 7d / 20× 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.

2026-06-04 13:10 UTCepss_batch
2026-06-04 13:10 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
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
2026-05-23 05:23 UTCEG score recompute
2026-05-23 05:23 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2020-7767?

CVE-2020-7767 is a medium vulnerability published on November 11, 2020. All versions of package express-validators are vulnerable to Regular Expression Denial of Service (ReDoS) when validating specifically-crafted invalid urls.

When was CVE-2020-7767 disclosed?

CVE-2020-7767 was first published in the National Vulnerability Database on November 11, 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-2020-7767 actively exploited?

CVE-2020-7767 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 58.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2020-7767?

CVE-2020-7767 has a CVSS v3 base score of 5.3 (NVD).

How do I remediate CVE-2020-7767?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-7767, 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-2020-7767

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