{"id":"CVE-2026-54649","title":"punchin-email is a Cloudflare Email Worker that provides two-way role aliases while relaying mail to a private inbox","summary":"punchin-email is a Cloudflare Email Worker that provides two-way role aliases while relaying mail to a private inbox. Prior to 1.5.0, handleInbound delivers inbound alias mail with message.forward(), which silently drops the added Reply-…","severity":"low","cvss":2.1,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","cwe":["CWE-200","CWE-201"],"vendor":"PunchIn-App","product":"punchin-email","affected":["punchin-email < 1.5.0"],"published":"2026-09-17","updated":"2026-09-24","sourceUpdated":"2026-09-24T21:17:17.103","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-54649","references":[{"url":"https://github.com/PunchIn-App/punchin-email/commit/593685ffc0b8eb3949a4838e7bfe1e97b953d084","label":"security-advisories@github.com"},{"url":"https://github.com/PunchIn-App/punchin-email/pull/66","label":"security-advisories@github.com"},{"url":"https://github.com/PunchIn-App/punchin-email/releases/tag/v1.5.0","label":"security-advisories@github.com"},{"url":"https://github.com/PunchIn-App/punchin-email/security/advisories/GHSA-2ph7-69xm-hmwv","label":"security-advisories@github.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-24T20:39:47.675180Z"},"cvssSource":"cna","epss":0.00838,"epssPercentile":0.55945,"ingestedAt":"2026-09-17T19:26:25.318Z","slug":"CVE-2026-54649","body":"## Overview\n\npunchin-email is a Cloudflare Email Worker that provides two-way role aliases while relaying mail to a private inbox. Prior to 1.5.0, handleInbound delivers inbound alias mail with message.forward(), which silently drops the added Reply-To header intended to route responses through the relay. When a correspondent sends mail to an alias and the operator replies, the mail client can send directly to the correspondent from the private FORWARD_TO inbox address, exposing that address. The disclosure is limited to the operator's own email address and does not expose third-party data or provide code execution or authentication bypass. This issue is fixed in version 1.5.0.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":12,"depthScoreParts":{"impact":11.6,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}