CVSS 3.1
9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCVE-2021-23406
Critical (9.8) in pac-resolver project pac-resolver. EPSS 2.9% chance of exploitation in the next 30 days. Fixed in pac-resolver 5.0.0.
This affects the package pac-resolver before 5.0.0. This can occur when used with untrusted input, due to unsafe PAC file handling. **NOTE:** The fix for this vulnerability is applied in the node-degenerator library, a dependency written by the same maintainer.
Severity
- EPSS
- 2.9% chance of exploitation in the next 30 days; higher than 87% of CVEs (scores of 2026-10-31)
- Published
- Modified
- Record from
- the NVD, synced
Affected
- pac-resolver_project:pac-resolver
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-9j49-mfvp-vmhm | npm | pac-resolver | <5.0.0 | 5.0.0 |
| GHSA-9j49-mfvp-vmhm | npm | degenerator | <3.0.1 | 3.0.1 |
References
- https://github.com/TooTallNate/node-degenerator/commit/9d25bb67d957bc2e5425fea7bf7a58b3fc64ff9e
- https://github.com/TooTallNate/node-degenerator/commit/ccc3445354135398b6eb1a04c7d27c13b833f2d5
- https://github.com/TooTallNate/node-pac-resolver/releases/tag/5.0.0
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1568506
- https://snyk.io/vuln/SNYK-JS-PACRESOLVER-1564857