CVE-2021-23406

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected software

Vendor	Product	Versions
n/a	pac-resolver	>= unspecified, < 5.0.0

References

https://github.com/TooTallNate/node-degenerator/commit/9d25bb67d957bc2e5425fea7bf7a58b3fc64ff9ePatch, Third Party Advisory
https://github.com/TooTallNate/node-degenerator/commit/ccc3445354135398b6eb1a04c7d27c13b833f2d5Patch, Third Party Advisory
https://github.com/TooTallNate/node-pac-resolver/releases/tag/5.0.0Patch, Release Notes, Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1568506Exploit, Patch, Third Party Advisory
https://snyk.io/vuln/SNYK-JS-PACRESOLVER-1564857Exploit, Patch, Third Party Advisory
https://github.com/TooTallNate/node-degenerator/commit/9d25bb67d957bc2e5425fea7bf7a58b3fc64ff9ePatch, Third Party Advisory
https://github.com/TooTallNate/node-degenerator/commit/ccc3445354135398b6eb1a04c7d27c13b833f2d5Patch, Third Party Advisory
https://github.com/TooTallNate/node-pac-resolver/releases/tag/5.0.0Patch, Release Notes, Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1568506Exploit, Patch, Third Party Advisory
https://snyk.io/vuln/SNYK-JS-PACRESOLVER-1564857Exploit, Patch, Third Party Advisory

Timeline

Published: Aug 24, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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