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TI-2026-84851 Aliases CVE-2026-121730GHSA-7mvm-jcxm-mh2j

emailflare Missing Authorization via Inbox Compose Endpoint

Priority LOW 31CWE-862Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
None · High · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-862.

Summary

emailflare before commit cf31f33 contains a missing authorization flaw (CWE-862) in the POST /api/inbox/compose endpoint. An authenticated member can supply an arbitrary from field, which is passed unchecked to the Cloudflare send call, so the member can send mail as any sender address. An attacker can impersonate other users or the organization to external recipients.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0022 12th percentileScored 2026-11-07
Fix Fixed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

No affected products listed by the sources yet.

Remediation

Update to commit cf31f33 or later, the first fixed commit. The sources list no fixed version number.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    0xdps emailflare cf31f33bbb4a324d5353b8a5db0312fedc19618f

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-84850 emailflare Missing Authorization on /api/keys RoutesPriority LOW 31
    Show all 2 records →

Timeline

  1. 2026-11-03 Threatist record created from CVE-2026-121730
  2. 2026-11-04 Alias added: GHSA-7mvm-jcxm-mh2j
  3. 2026-11-05 Priority changed: MEDIUM → LOW
  4. 2026-11-07 CISA SSVC decision points changed

References

Patch 1

Other 2

  • TI-2026-84850 emailflare Missing Authorization on /api/keys Routes CVSS 4.0HIGH 7.2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences