CVE-2021-23664: Server-side Request Forgery (SSRF)

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2022-01-21 · updated 2026-06-17
Weakness: CWE-918

Description

The package @isomorphic-git/cors-proxy before 2.7.1 are vulnerable to Server-side Request Forgery (SSRF) due to missing sanitization and validation of the redirection action in middleware.js.

Affected products

@isomorphic-git/cors-proxy: before 2.7.1 — fixed in 2.7.1

How to fix

Upgrade to a fixed version: @isomorphic-git/cors-proxy 2.7.1. Check the vendor advisory for mitigations.

References

https://github.com/isomorphic-git/cors-proxy/commit/1b1c91e71d946544d97ccc7cf0ac62b859e03311
https://snyk.io/vuln/SNYK-JS-ISOMORPHICGITCORSPROXY-1734788
https://github.com/isomorphic-git/cors-proxy/commit/1b1c91e71d946544d97ccc7cf0ac62b859e03311
https://snyk.io/vuln/SNYK-JS-ISOMORPHICGITCORSPROXY-1734788

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