Vulnerability · Published Oct 27, 2026 · Assigned by GitHub_M
CVE-2026-57202Asterisk: ARI setChannelVar bypasses live_dangerously and permits FILE() writes
High 8.1
In plain English
A high-severity security flaw in asterisk from asterisk. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Asterisk is an open source private branch exchange and telephony toolkit. Prior to Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3, an authenticated Asterisk REST Interface (ARI) attacker with read-only privileges may use `setChannelVar` to execute write dialplan functions, including `FILE()` writes, even when `live_dangerously` in `asterisk.conf` is set to no. The Asterisk HTTP web server must be enabled and reachable, and the attacker must already have valid `read-only ARI credentials`. HTTP is disabled by default and binds only to 127.0.0.1 by default even when enabled. This issue is fixed in Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:14 | asterisk | 1:22.10.1+dfsg+~cs6.17.60671434-1 | DEBIAN-CVE-2026-57202 |
| Ubuntu:22.04:LTS | asterisk | no fix listed | UBUNTU-CVE-2026-57202 |
| Ubuntu:24.04:LTS | asterisk | no fix listed | UBUNTU-CVE-2026-57202 |
| Ubuntu:26.04:LTS | asterisk | no fix listed | UBUNTU-CVE-2026-57202 |
| Ubuntu:26.10 | asterisk | no fix listed | UBUNTU-CVE-2026-57202 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| asterisk | asterisk | < 20.20.1>= 21.0.0-pre1, < 21.12.3>= 22.0.0-pre1, < 22.10.1>= 23.0.0-pre1, < 23.4.1 |
| asterisk | certified-asterisk | < 20.7-cert11>= 22.8-cert1-pre1, < 22.8-cert3 |
Weakness: CWE-267, CWE-1220 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
References
- https://github.com/asterisk/asterisk/security/advisories/GHSA-vrfp-mg3q-3959 x_refsource_CONFIRM
- https://github.com/asterisk/asterisk/commit/8f8ccaf70a80e518147b0c35c0c252de4735446f x_refsource_MISC
- https://github.com/asterisk/asterisk/commit/92a5dd1003b737ae1cd2df4e60b73beb8d5e42bb x_refsource_MISC
- https://github.com/asterisk/asterisk/commit/ba04e7f1f98887c3c6e0dc4ddce663021f7e948a x_refsource_MISC
- https://github.com/asterisk/asterisk/commit/bf9354267557ef6d6b75f5304faa243f595a5a66 x_refsource_MISC
- https://github.com/asterisk/asterisk/commit/caa4d50d9c3bf04fc979b5b2cdc5dc425772d845 x_refsource_MISC
- https://github.com/asterisk/asterisk/commit/d47b0b6e5a384746db194f751b53d559aba8dba9 x_refsource_MISC
- https://github.com/asterisk/asterisk/commit/d8614505b27688dec3a1d14554f52fda94712928 x_refsource_MISC
- https://github.com/asterisk/asterisk/releases/tag/20.20.1 x_refsource_MISC
- https://github.com/asterisk/asterisk/releases/tag/21.12.3 x_refsource_MISC
- https://github.com/asterisk/asterisk/releases/tag/22.10.1 x_refsource_MISC
- https://github.com/asterisk/asterisk/releases/tag/23.4.1 x_refsource_MISC
- https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11 x_refsource_MISC
- https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3 x_refsource_MISC
- https://github.com/asterisk/asterisk/tree/24.0.0-pre1 x_refsource_MISC