CVE-2026-890269.8CriticalCWE-321
Issabel Foundation Issabel Framework vulnerability
Issabel Foundation · Issabel Framework
Not in CISA KEVVendor fix available
2.7%probability of exploitation in the next 30 days
85th percentile
050100
Higher than 85% of scored CVEs
9.8CriticalCVSS 4.0
LowMediumHighCrit.
DescriptionNVD
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.
Coverage1 article · 1 outlet
First in our coverage: SecurityOnline, 16 Sep.
- Attackers Exploit Critical Issabel PBX Flaw to Run Commands RemotelySecurityOnline · first in our coverage
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