CVE-2026-54649

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Source

https://cve.org/CVERecord?id=CVE-2026-54649

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54649.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-54649

Aliases

GHSA-2ph7-69xm-hmwv

Published

2026-09-17T18:29:23Z

Modified

2026-09-19T03:46:48Z

Severity

2.1 (Low) CVSS_V4 - 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 CVSS Calculator

Summary

punchin-email: Operator inbox (FORWARD_TO) disclosed to correspondents on reply — Cloudflare forward() drops the relay Reply-To

Details

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.

Database specific

{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-200",
        "CWE-201"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54649.json"
}

References

Affected packages

Git / github.com/punchin-app/punchin-email

Affected ranges

Type

GIT

Repo

https://github.com/punchin-app/punchin-email

Events

Introduced

Fixed

593685ffc0b8eb3949a4838e7bfe1e97b953d084

Database specific

Show details

{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.5.0"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

v1.*

v1.0.0

v1.0.1

v1.1.0

v1.1.1

v1.2.0

v1.2.1

v1.2.2

v1.2.3

v1.2.4

v1.2.5

v1.2.6

v1.3.0

v1.3.1

v1.4.0

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54649.json"