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CVE-2026-89026 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

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.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:10 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

CNA: [email protected]CVSS-B:9.8 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/IssabelFoundation/framework/commit/b97dbaf0b71c1c36f841e672b664afbeb02773bd	[email protected]	Source CodeVendor
https://www.vulncheck.com/advisories/issabel-pbx-hard-coded-jwt-key-rce-via-pbxapi-manager-originate	[email protected]	AdvisoryRemedy

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-321	Use of Hard-coded Cryptographic Key	[email protected]

Affected Products

Product	Versions
Issabel Framework	< b97dbaf0b71c1c36f841e672b664afbeb02773bd
CPE No CPEs found in CPE dictionary for this product. Remediation No remediation found in references.

Change History

2 change records found show changes

Date	Action	Recorded By
Sep 17, 2026	CVE Modified	CISA-ADP
Sep 15, 2026	New CVE Received	[email protected]