GHSL-2020-291: Regular Expression Denial of Service (ReDoS) in CommonRegexJS
Priority HIGH 77CWE-1333Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-1333.
Summary
CommonRegexJS is a CommonRegex port for JavaScript. All available versions contain one or more regular expressions that are vulnerable to Regular Expression Denial of Service (ReDoS). As of time of publication, no known patches are available.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00479 41st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| talyssonoc | CommonRegexJS | all versions | — | No fix listed | CNA |
| — | commonregex (npm) | up to 0.3.1 | — | No fix listed | GHSA-pmvv-57rg-5g86 |
- CommonRegexJS Vendortalyssonoc Affected all versions Fixed in — No fix listed CNA
- commonregex (npm) Vendor— Affected up to 0.3.1 Fixed in — No fix listed GHSA-pmvv-57rg-5g86
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:talyssonoc:commonregexjs:*:*:*:*:*:node.js:*:* | all versions | Vulnerable | talyssonoc |
- cpe:2.3:a:talyssonoc:commonregexjs:*:*:*:*:*:node.js:*:* Versions all versions Vulnerable ·talyssonoc
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-26305
- 2026-10-03 Alias added: GHSA-pmvv-57rg-5g86
References
Advisory 4
Sources
- CVE-2020-26305 · CVE Program
- CVE-2020-26305 · NVD
- FIRST EPSS
- GHSA-pmvv-57rg-5g86 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences