BillionMail through 4.9 contains a hard-coded cryptographic key vulnerability that allows unauthenticated attackers to forge unsubscribe and subscribe-confirm JWTs by computing the key from shipped configuration constants. Attackers can submit forged tokens to /api/unsubscribe, /api/unsubscribe_new, or /api/subscribe/confirm to deactivate any contact or force confirmed subscriptions.
History

Wed, 21 Oct 2026 02:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 19 Oct 2026 13:15:00 +0000

Type Values Removed Values Added
First Time appeared Aapanel
Aapanel billionmail
Vendors & Products Aapanel
Aapanel billionmail

Thu, 15 Oct 2026 22:00:00 +0000

Type Values Removed Values Added
Description BillionMail through 4.9 contains a hard-coded cryptographic key vulnerability that allows unauthenticated attackers to forge unsubscribe and subscribe-confirm JWTs by computing the key from shipped configuration constants. Attackers can submit forged tokens to /api/unsubscribe, /api/unsubscribe_new, or /api/subscribe/confirm to deactivate any contact or force confirmed subscriptions.
Title BillionMail through 4.9 Forgeable JWTs via Default Signing Key
Weaknesses CWE-1394
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-10-15T21:43:50.886Z

Updated: 2026-10-21T01:53:10.056Z

Reserved: 2026-10-15T21:21:22.403Z

Link: CVE-2026-111367

cve-icon Vulnrichment

Updated: 2026-10-21T01:53:03.491Z

cve-icon NVD

Status : Deferred

Published: 2026-10-15T22:19:34.703

Modified: 2026-10-21T02:17:06.403

Link: CVE-2026-111367

cve-icon Redhat

No data.