Vulnerability · Published Apr 20, 2026 · Assigned by VulDB
CVE-2026-6662ericc-ch copilot-api Token Endpoint server.ts cors cross-domain policy
High 7.3
In plain English
A high-severity security flaw in copilot-api from ericc-ch. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities).
Severity (CVSS 3.1)7.3High
Exploit odds (30 days)0.2%top 92.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| ericc-ch | copilot-api | 0.10.20.30.40.50.60.7.0 |
Weakness: CWE-942, CWE-346 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
References
- VDB-358300 | ericc-ch copilot-api Token Endpoint server.ts cors cross-domain policy vdb-entry, technical-description
- VDB-358300 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- Submit #794601 | ericc-ch copilot-api 0.7.0 Cross-Origin Token Theft via Wildcard CORS & Open Token Endpoint third-party-advisory
- https://github.com/August829/CVEP/issues/31 exploit, issue-tracking