# CVE-2026-124579: aaPanel BillionMail Relay Configuration API relay.go injection

Status: published. Published: 2026-11-09. Updated: 2026-11-09.

A vulnerability was determined in aaPanel BillionMail up to 4.9. Affected by this issue is some unknown functionality of the file core/api/relay/v1/relay.go of the component Relay Configuration API. Executing a manipulation of the argument helo_name can lead to injection. The attack may be performed from remote. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- aaPanel / BillionMail: 4.0 (affected); 4.1 (affected); 4.2 (affected); 4.3 (affected); 4.4 (affected); 4.5 (affected); 4.6 (affected); 4.7 (affected); 4.8 (affected); 4.9 (affected). Source: CNA: VulDB

## Severity and prioritization

- CVSS 4.0: 5.3 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P; source: CNA: VulDB

- CVSS 3.1: 7.4 (high); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L/E:P/RL:X/RC:C; source: CNA: VulDB

- CVSS 3.0: 7.4 (high); CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L/E:P/RL:X/RC:C; source: CNA: VulDB

- CVSS 2.0: 6.5 (medium); AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:C; source: CNA: VulDB

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-74, CWE-707

## Exploit evidence

- exploit: https://gist.github.com/stoic-crawler/07c4b68b76b870659ade38d0035fced8 (CNA: VulDB)

## References

- https://vuldb.com/vuln/432929 (CNA: VulDB; vdb-entry, technical-description)

- https://vuldb.com/vuln/432929/cti (CNA: VulDB; signature, permissions-required)

- https://vuldb.com/cve/CVE-2026-124579 (CNA: VulDB; third-party-advisory)

- https://vuldb.com/submit/1038400 (CNA: VulDB; third-party-advisory)

- https://gist.github.com/stoic-crawler/07c4b68b76b870659ade38d0035fced8 (CNA: VulDB; exploit)

## Provenance

- CNA: VulDB: https://www.cve.org/CVERecord?id=CVE-2026-124579; retrieved 2026-11-09; source updated 2026-11-09

Revision: efce8a72a880635482f177ef327ce96be4022f7d7060c8140d1114c7c8789fe1

Canonical: https://y2.dev/cve/CVE-2026-124579

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