GHSL-2020-303: Regular Expression Denial of Service (ReDoS) in nope-validator
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
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-1333.
Summary
Validate.js provides a declarative way of validating javascript objects. Versions 0.11.3 and prior contain one or more regular expressions that are vulnerable to Regular Expression Denial of Service (ReDoS). As of time of publication, it is unknown if any patches are available.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00454 39th percentileScored 2026-11-07
Fix Fixed nope-validator (npm): 0.12.1
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 |
|---|---|---|---|---|---|
| ftonato | nope-validator | up to 0.11.3 | — | No fix listed | CNA |
| — | nope-validator (npm) | before 0.12.1 | 0.12.1 | Patch available | GHSA-3phv-83cj-p8p7 |
- nope-validator Vendorftonato Affected up to 0.11.3 Fixed in — No fix listed CNA
- nope-validator (npm) Vendor— Affected before 0.12.1 Fixed in 0.12.1 Patch available GHSA-3phv-83cj-p8p7
Remediation
- Fix · GHSA-3phv-83cj-p8p7 nope-validator (npm) Fixed in 0.12.1 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2020-26309
- 2026-10-03 Alias added: GHSA-3phv-83cj-p8p7
References
Advisory 2
Other 5
- https://securitylab.github.com/advisories/GHSL-2020-303-redos-nope-validator/
- https://github.com/ftonato/nope-validator/issues/352
- https://github.com/ftonato/nope-validator/commit/4564b7444dcd92769e5c5b80420469c9f18b7a05#diff-9c399c46fa266bcf2be2704fbb369181726959e148e95ab548a32ef9ca9e7d47R1
- https://github.com/ftonato/nope-validator/commit/c8af9f93abe8f4786f8f69d2b0518f8ca3652f44
- https://github.com/ftonato/nope-validator
Sources
- CVE-2020-26309 · CVE Program
- CVE-2020-26309 · NVD
- FIRST EPSS
- GHSA-3phv-83cj-p8p7 · 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