CVE-2026-54649
punchin-email is a Cloudflare Email Worker that provides two-way role aliases while relaying mail to a private inbox.
Impact
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-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.
Affected packages
This record carries no package version data, so it cannot be matched against a dependency list automatically. Read the advisory and compare your version by hand.
Weakness classification
References
- NVD record
- CVE.org record
- https://github.com/PunchIn-App/punchin-email/commit/593685ffc0b8eb3949a4838e7bfe1e97b953d084
- https://github.com/PunchIn-App/punchin-email/pull/66
- https://github.com/PunchIn-App/punchin-email/releases/tag/v1.5.0
- https://github.com/PunchIn-App/punchin-email/security/advisories/GHSA-2ph7-69xm-hmwv