CVE-2020-7754: Regular Expression Denial of Service (ReDoS)
Vulnerability summary
CVE-2020-7754 is a high (CVSS 7.5) vulnerability in npmjs npm-user-validate. EPSS estimates a 3.48% chance of exploitation in the next 30 days, higher than 89.1% of scored vulnerabilities. 2 public exploits are recorded.
Public exploit (reference, Date unknown)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 6Timeline
- 27-10-2020PublishedVulnerability first disclosed.
- 17-09-2024Last modifiedVulnerability information updated.
Description
This affects the package npm-user-validate before 1.0.1. The regex that validates user emails took exponentially longer to process long input strings beginning with @ characters.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · NpmEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVDNIST7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
3.48%
Chance of exploitation in the next 30 days
Percentile
89%
Versus all other CVEs
30-day change
No change 0.00 pp
From 3.48% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
2 foundExploit Reference (snyk.io)
Maturity: unknown
Exploit Reference (snyk.io)
Maturity: unknown
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Npm1 product
- npm-user-validate< 1.0.1
Npmjs1 product
- npm-user-validate< 1.0.1
2 vendors · 2 products
References
5 links- github.com/npm/npm-user-validate/security/advisories/GHSA-xgh6-85xh-479pX Refsource MISCWEBThird Party Advisory
- github.com/npm/npm-user-validate/commit/c8a87dac1a4cc6988b5418f30411a8669bef204eX Refsource MISCWEBPatchThird Party Advisory
