CVE-2026-89026 Issabel Framework - Authentication Bypass

Issabel Framework before commit b97dbaf contains a hard-coded HS256 JWT signing key in pbxapi index.php, letting unauthenticated remote attackers forge tokens to execute arbitrary OS commands as Asterisk user.

CVSS base score 9.8 /10
Critical
CISA KEV
Exploited in the wild
Public exploit
Proof of concept available
Authentication
Not required
EPSS
0.69% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Authentication Bypass
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
15 September 2026
Updated
15 October 2026
Weakness
CWE-321

Vendor fix

Update to the version after commit b97dbaf or latest available version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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