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TI-2026-75097 Aliases CVE-2026-111367

Hardcoded key in BillionMail lets attackers forge JWTs

Priority HIGH 70CWE-1394Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · Low · Low
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

aaPanel BillionMail through 4.9 contains a hardcoded cryptographic key that is computed from configuration constants shipped with the product, which is classified as CWE-1394. An unauthenticated remote attacker can forge unsubscribe and subscribe confirmation tokens to deactivate any contact or force confirmed subscriptions. CISA's SSVC assessment rates exploitation as proof of concept.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00332 26th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
aaPanelBillionMailup to 4.9—No fix listedCNA
  • BillionMail VendoraaPanel Affected up to 4.9 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for BillionMail.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Timeline

  1. 2026-10-16 Threatist record created from CVE-2026-111367
  2. 2026-10-16 Priority changed: MEDIUM → LOW
  3. 2026-10-21 CISA SSVC decision points changed
  4. 2026-10-21 Priority changed: LOW → HIGH

References

Advisory 1

Other 3

  • TI-2026-23391 An arbitrary file upload vulnerability in aaPanel v7.57.0 allows attackers to execute… CVSS 3.1CRITICAL 9.8
  • TI-2026-65055 aaPanel BaoTa File Merge files.py merge_split_file command injection CVSS 4.0CRITICAL 9.4
  • TI-2026-65056 aaPanel BaoTa Unzip panelTask.py panelTask.bt_task._unzip os command injection CVSS 4.0CRITICAL 9.3
  • TI-2026-65054 aaPanel BaoTa Database Backup database.py InputSql os command injection CVSS 4.0CRITICAL 9.3
  • TI-2026-23390 A lack of path validation in aaPanel v7.57.0 allows attackers to execute a local file… CVSS 3.1HIGH 7.5
  • TI-2026-23389 An issue in the VirtualHost configuration handling/parser component of aaPanel v7.57.0… CVSS 3.1HIGH 7.5
See all 15 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences