CVE-2026-111367: medium-severity vulnerability in aaPanel BillionMail
BillionMail through 4.9 Forgeable JWTs via Default Signing Key
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.9epss 0.3%
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.
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
Affected products
aaPanel · BillionMailReferences
https://github.com/aaPanel/BillionMailhttps://github.com/aaPanel/BillionMail/blob/v4.9/core/internal/service/batch_mail/jwt.go#L98-L123https://github.com/aaPanel/BillionMail/blob/v4.9/core/manifest/config/config.yamlhttps://hackmd.io/@hieuPenguinnn/billionmail-unsubscribe-subscribe-jwt-deterministic-secret-forgeryhttps://www.vulncheck.com/advisories/billionmail-through-4.9-forgeable-jwts-via-default-signing-key