CVE-2026-6662: ericc-ch copilot-api Token Endpoint server.ts cors cross-domain policy

Severity: high (CVSS 7.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-04-20 · updated 2026-10-26
Weakness: CWE-346

Description

A vulnerability was found in ericc-ch copilot-api up to 0.7.0. The impacted element is the function cors of the file src/server.ts of the component Token Endpoint. Performing a manipulation results in permissive cross-domain policy with untrusted domains. It is possible to initiate the attack remotely. The exploit has been made public and could be used.

Affected products

ericc-ch copilot-api: 0.1, 0.2, 0.3, 0.4, 0.5, 0.6 (+1)

References

https://github.com/August829/CVEP/issues/31
https://vuldb.com/submit/794601
https://vuldb.com/vuln/358300
https://vuldb.com/vuln/358300/cti

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