---
id: CVE-2026-123664
title: nasa-gcn gcn.nasa.gov Email Notification email improper authorization
summary: >-
  A security flaw has been discovered in nasa-gcn gcn.nasa.gov up to
  b299b562af665878964b981a459f0a9c04b11adf. This issue affects some unknown
  processing of the file /user/email of the component Email Notification
  Handler. Performing a man…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L/E:P/RL:X/RC:C'
cvssSource: cna
cwe:
  - CWE-285
  - CWE-266
vendor: nasa-gcn
product: gcn.nasa.gov
affected:
  - gcn.nasa.gov b299b562af665878964b981a459f0a9c04b11adf
published: '2026-11-06'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T14:30:21.995Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-123664'
references:
  - url: 'https://vuldb.com/vuln/431788'
    label: >-
      VDB-431788 | nasa-gcn gcn.nasa.gov Email Notification email improper
      authorization
  - url: 'https://vuldb.com/vuln/431788/cti'
    label: 'VDB-431788 | CTI Indicators (IOB, IOC, TTP, IOA)'
  - url: 'https://vuldb.com/cve/CVE-2026-123664'
    label: CVE-2026-123664 | CVE Analysis and Report
  - url: 'https://vuldb.com/submit/1033135'
    label: >-
      Submit #1033135 | GitHub https://github.com/nasa-gcn/gcn.nasa.gov 4.7.10
      Insufficient Verification of Data Authenticity
  - url: 'https://github.com/nasa-gcn/gcn.nasa.gov/issues/3805'
  - url: 'https://https:/github.com/nasa-gcn/gcn.nasa.gov/pull/3863'
  - url: 'https://github.com/nasa-gcn/gcn.nasa.gov/'
tags:
  - cve.org
ingestedAt: '2026-11-06T14:53:08.177Z'
epss: 0.00235
epssPercentile: 0.1452
---

## Overview

A security flaw has been discovered in nasa-gcn gcn.nasa.gov up to b299b562af665878964b981a459f0a9c04b11adf. This issue affects some unknown processing of the file /user/email of the component Email Notification Handler. Performing a manipulation of the argument Recipient results in improper authorization. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks. This product adopts a rolling release strategy to maintain continuous delivery. Therefore, version details for affected or updated releases cannot be specified. The pull request to fix this issue awaits acceptance.

## Affected

- `gcn.nasa.gov b299b562af665878964b981a459f0a9c04b11adf`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.