# CVE-2026-57200: Asterisk authorization bypass in ARI REST-over-WebSocket

Source: https://junglewise.ai/threats/cve-2026-57200-asterisk-is-an-open-source-private-branch-exchange-and-telephony  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-27. Updated: 2026-10-27  
License: CC BY 4.0 with a link back

CVE-2026-57200 · Severity: high · CVSS 7.5 · Published 2026-10-27

Asterisk is an open-source telecommunications platform used to build telephone systems and voice applications. An authenticated attacker with read-only API credentials can bypass authorization checks through the REST-over-WebSocket interface to perform write operations, potentially loading malicious modules and executing arbitrary code. The vulnerability requires an attacker to already possess valid read-only credentials and requires the HTTP web server to be enabled.

Technologies: [Asterisk](https://junglewise.ai/threats/technologies/asterisk). Vendors: [Asterisk](https://junglewise.ai/threats/vendors/asterisk).

## Quick answers

**Is CVE-2026-57200 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-57200 being exploited in the wild.

**How severe is CVE-2026-57200?** High severity, with a CVSS score of 7.5, published 27 October 2026.

**Which products and versions are affected?** Asterisk before 20.20.1, 21.x before 21.12.3, 22.x before 22.10.1, 23.x before 23.4.1; Certified Asterisk before 22.8-cert3.

**Is there a fix for CVE-2026-57200?** Yes: fixed in Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1; Certified Asterisk 22.8-cert3. Until then: Disable the HTTP web server if not required, or restrict HTTP access to the localhost/loopback interface (127.0.0.1) where it is bound by default. Limit network access to the Asterisk HTTP server and ensure ARI read-only credentials are not distributed to untrusted users. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-57200 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-57200?** Check whether you run Asterisk at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1; Certified Asterisk 22.8-cert3

Disable the HTTP web server if not required, or restrict HTTP access to the localhost/loopback interface (127.0.0.1) where it is bound by default. Limit network access to the Asterisk HTTP server and ensure ARI read-only credentials are not distributed to untrusted users.

## Technical details

The vulnerability is an authorization bypass in the Asterisk REST Interface (ARI) REST-over-WebSocket handler where query parameters from the initial GET upgrade request were not properly forwarded to subsequent REST requests over the WebSocket connection. An authenticated attacker with read-only ARI credentials can execute non-GET methods (PUT, DELETE, POST) through the WebSocket, bypassing the intended read-only permission model. This allows arbitrary module path loading and conditional remote code execution on the Asterisk server.

## Affected products

- Asterisk Asterisk before 20.20.1, 21.x before 21.12.3, 22.x before 22.10.1, 23.x before 23.4.1; Certified Asterisk before 22.8-cert3

## Timeline

- 2026-10-27: disclosed
- 2026-06-25: patched: Patches committed to resolve GHSA-wcvv-g26m-wx5c

## References

- [https://github.com/asterisk/asterisk/commit/051d29a0d35559e9165bab346de9422e25415533](https://github.com/asterisk/asterisk/commit/051d29a0d35559e9165bab346de9422e25415533)
- [https://github.com/asterisk/asterisk/commit/205c301a0a0b0d013d4ebdf12856ebbc30405350](https://github.com/asterisk/asterisk/commit/205c301a0a0b0d013d4ebdf12856ebbc30405350)

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