CVE-2026-89026 Issabel Framework Hard-coded JWT Key RCE via pbxapi/manager/originate
Hard-coded JWT key allows unauthenticated attackers to forge tokens and execute arbitrary OS commands via the manager originate endpoint.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-89026?
CVE-2026-89026 is a critical vulnerability in Issabel Framework, published on 15 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Issabel Framework, the web framework supporting Issabel PBX software, before commit b97dbaf contains a hard-coded HS256 JWT signing key in the pbxapi index.php file that is identical across every installation, allowing unauthenticated remote attackers to forge valid bearer tokens. Attackers can use the forged token to call the manager originate endpoint with the System application parameter, causing Asterisk to execute arbitrary OS commands as the Asterisk user. Exploitation evidence was first observed by the Shadowserver Foundation on 2026-09-09.
Weakness: CWE-321
Which versions are affected by CVE-2026-89026?
How do I fix CVE-2026-89026?
No fix has been published for CVE-2026-89026 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-89026 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-89026 exists.
Public exploit code: 1 Nuclei template and 2 proofs of concept on GitHub.
Sources
Also known as GHSA-mmrg-2gjg-78x9.