CVE-2026-121730

MEDIUMCVSS 6.5/10

Last modified

CVE-2026-121730 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. emailflare before commit cf31f33 contains a missing authorization vulnerability in POST /api/inbox/compose that allows authenticated members to send mail as any sender address. Attackers can supply an arbitrary from field, which is passed unchecked to the Cloudflare send call, to impersonate other users or the organization to external recipients..

Description

emailflare before commit cf31f33 contains a missing authorization vulnerability in POST /api/inbox/compose that allows authenticated members to send mail as any sender address. Attackers can supply an arbitrary from field, which is passed unchecked to the Cloudflare send call, to impersonate other users or the organization to external recipients.

Metrics

Weakness Enumeration

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
0xdpsemailflare< cf31f33bbb4a324d5353b8a5db0312fedc19618f

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-121730?
emailflare before commit cf31f33 contains a missing authorization vulnerability in POST /api/inbox/compose that allows authenticated members to send mail as any sender address. Attackers can supply an arbitrary from field, which is passed unchecked to the Cloudflare send call, to impersonate other users or the organization to external recipients.
How severe is CVE-2026-121730?
CVE-2026-121730 has a CVSS score of 6.5/10 (MEDIUM severity).
How do I fix CVE-2026-121730?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST