CVE-2020-26306 json
GHSL-2020-296: Regular Expression Denial of Service (ReDoS) in Knwl.js
published 2024-10-26 2 y ago modified 2026-06-17 4 mo ago also GHSA-68qg-g787-3rp5 , EUVD-2024-2963
- cvss
- 8.7
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 39%
- public exploits
- 0
- none known
Summary
Knwl.js is a Javascript library that parses through text for dates, times, phone numbers, emails, places, and more. Versions 1.0.2 and prior 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.
Patch / fix
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction
0.45% chance of exploitation in the next 30 days, higher than 39% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/U:Green |
| CNA | 4.0 | 8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Green |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | knwl.js | <=1.0.2 |
no fix listed |
Affected products
- benhmoore Knwl
Classification
- Weakness
-
- CWE-1333 Inefficient Regular Expression Complexity
References
-
github.com
/benhmoore/Knwl/commit/88aa966b1415a167c7c91b70053b72c7762c1cc0
web
- securitylab.github.com /advisories/GHSL-2020-296-redos-Knwl.js/
-
github.com
/benhmoore/Knwl/issues/106
web
-
nvd.nist.gov
/vuln/detail/CVE-2020-26306
advisory
-
github.com
/benhmoore/Knwl
package
-
securitylab.github.com
/advisories/GHSL-2020-296-redos-Knwl.js
advisory
Sources
- CVE List CVE-2020-26306
- GitHub Advisory GHSA-68qg-g787-3rp5
- NVD CVE-2020-26306
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