{"id":"CVE-2026-111367","revision":null,"records":[{"revision":"0e5c9ff86a30475d87e9bcd5d02c4ab6","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-111367","aliases":[],"title":"BillionMail through 4.9 Forgeable JWTs via Default Signing Key","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.","state":0,"publishedAt":"2026-10-15T21:43:50.886+00:00","modifiedAt":"2026-10-21T01:53:10.056+00:00","affected":[{"ecosystem":"Vendor product","name":"BillionMail","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"aaPanel\",\n                    \"product\": \"BillionMail\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"lessThanOrEqual\": \"4.9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"custom\"\n                        }\n                    ],\n                    \"packageURL\": \"pkg:github/aaPanel/BillionMail\",\n                    \"repo\": \"https://github.com/aaPanel/BillionMail\"\n                }"}],"metrics":[{"system":"CVSS 4.0","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","score":6.9,"severity":"MEDIUM"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L","score":6.5,"severity":"MEDIUM"}],"references":["https://hackmd.io/@hieuPenguinnn/billionmail-unsubscribe-subscribe-jwt-deterministic-secret-forgery","https://github.com/aaPanel/BillionMail/blob/v4.9/core/internal/service/batch_mail/jwt.go#L98-L123","https://github.com/aaPanel/BillionMail/blob/v4.9/core/manifest/config/config.yaml","https://github.com/aaPanel/BillionMail","https://www.vulncheck.com/advisories/billionmail-through-4.9-forgeable-jwts-via-default-signing-key"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-111367","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-111367","identifiers":["CVE-2026-111367"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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