A Regular Expression Denial of Service (ReDOS) vulnerability was discovered in regexfn…
Priority LOW 35CWE-1333Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-1333.
Summary
A Regular Expression Denial of Service (ReDOS) vulnerability was discovered in regexfn v1.0.5 when validating crafted invalid emails.
Why it matters now
EPSS 0.01054 64th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:regexfn_project:regexfn:1.0.5:*:*:*:*:node.js:*:* | 1.0.5 | Vulnerable | Regexfn Project |
- cpe:2.3:a:regexfn_project:regexfn:1.0.5:*:*:*:*:node.js:*:* Versions 1.0.5 Vulnerable ·Regexfn Project
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-40900
- 2026-10-03 Alias added: GHSA-6m39-m6c5-cfp9
References
Sources
- CVE-2021-40900 · CVE Program
- CVE-2021-40900 · NVD
- FIRST EPSS
- GHSA-6m39-m6c5-cfp9 · GitHub Advisory Database · CC BY 4.0
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