CVE-2026-123664 (GCVE-0-2026-123664)

Vulnerability from cvelistv5 – Published: 2026-11-06 14:30 – Updated: 2026-11-06 14:30
VLAI
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 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.
Severity
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
5.4 (Medium)
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
5.4 (Medium)
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L/E:P/RL:X/RC:C
CWE
  • CWE-285 - Improper Authorization
  • CWE-266 - Incorrect Privilege Assignment
Assigner
VulDB CNA under the mitre root
CNA scorecard B 83/100 over 3843 records in the last 180 days details
References
URL Tags
https://vuldb.com/vuln/431788 vdb-entrytechnical-description
https://vuldb.com/vuln/431788/cti signaturepermissions-required
https://vuldb.com/cve/CVE-2026-123664 third-party-advisory
https://vuldb.com/submit/1033135 third-party-advisory
https://github.com/nasa-gcn/gcn.nasa.gov/issues/3805 exploitgovernment-resourceissue-tracking
https://https:/github.com/nasa-gcn/gcn.nasa.gov/p… broken-linkgovernment-resourceissue-trackingpatch
https://github.com/nasa-gcn/gcn.nasa.gov/ government-resourceproduct
Impacted products
Vendor Product Version CPE status
nasa-gcn gcn.nasa.gov Affected: b299b562af665878964b981a459f0a9c04b11adf
    cpe:2.3:a:nasa-gcn:gcn.nasa.gov:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
NirvanaOn (VulDB User) VulDB CNA Team
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:nasa-gcn:gcn.nasa.gov:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "Email Notification Handler"
          ],
          "product": "gcn.nasa.gov",
          "vendor": "nasa-gcn",
          "versions": [
            {
              "status": "affected",
              "version": "b299b562af665878964b981a459f0a9c04b11adf"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "NirvanaOn (VulDB User)"
        },
        {
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          "type": "coordinator",
          "value": "VulDB CNA Team"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
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            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:P",
            "version": "4.0"
          }
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            "version": "3.1"
          }
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      "problemTypes": [
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            }
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        {
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      "providerMetadata": {
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        "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
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      "references": [
        {
          "name": "VDB-431788 | nasa-gcn gcn.nasa.gov Email Notification email improper authorization",
          "tags": [
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          ],
          "url": "https://vuldb.com/vuln/431788"
        },
        {
          "name": "VDB-431788 | CTI Indicators (IOB, IOC, TTP, IOA)",
          "tags": [
            "signature",
            "permissions-required"
          ],
          "url": "https://vuldb.com/vuln/431788/cti"
        },
        {
          "name": "CVE-2026-123664 | CVE Analysis and Report",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/cve/CVE-2026-123664"
        },
        {
          "name": "Submit #1033135 | GitHub https://github.com/nasa-gcn/gcn.nasa.gov 4.7.10 Insufficient Verification of Data Authenticity",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/submit/1033135"
        },
        {
          "tags": [
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            "issue-tracking"
          ],
          "url": "https://github.com/nasa-gcn/gcn.nasa.gov/issues/3805"
        },
        {
          "tags": [
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            "government-resource",
            "issue-tracking",
            "patch"
          ],
          "url": "https://https:/github.com/nasa-gcn/gcn.nasa.gov/pull/3863"
        },
        {
          "tags": [
            "government-resource",
            "product"
          ],
          "url": "https://github.com/nasa-gcn/gcn.nasa.gov/"
        }
      ],
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          "time": "2026-11-06T00:00:00.000Z",
          "value": "Advisory disclosed"
        },
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          "lang": "en",
          "time": "2026-11-06T01:00:00.000Z",
          "value": "VulDB entry created"
        },
        {
          "lang": "en",
          "time": "2026-11-06T10:24:17.000Z",
          "value": "VulDB entry last update"
        }
      ],
      "title": "nasa-gcn gcn.nasa.gov Email Notification email improper authorization",
      "x_generator": [
        "VulDB PVTS v202611"
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
    "cveId": "CVE-2026-123664",
    "datePublished": "2026-11-06T14:30:21.995Z",
    "dateReserved": "2026-11-06T09:19:10.777Z",
    "dateUpdated": "2026-11-06T14:30:21.995Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-123664",
      "date": "2026-11-09",
      "epss": "0.00235",
      "percentile": "0.14515"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "cpes": [
                  "cpe:2.3:a:nasa-gcn:gcn.nasa.gov:*:*:*:*:*:*:*:*"
                ],
                "modules": [
                  "Email Notification Handler"
                ],
                "product": "gcn.nasa.gov",
                "vendor": "nasa-gcn",
                "versions": [
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                    "status": "affected",
                    "version": "b299b562af665878964b981a459f0a9c04b11adf"
                  }
                ]
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            ],
            "source": "cna@vuldb.com"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "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."
          }
        ],
        "id": "CVE-2026-123664",
        "lastModified": "2026-11-06T15:17:20.597",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "MEDIUM",
              "cvssData": {
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                "confidentialityImpact": "NONE",
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                "version": "2.0"
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              "impactScore": 4.9,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
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            }
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          "cvssMetricV31": [
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                "baseSeverity": "MEDIUM",
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                "scope": "UNCHANGED",
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              "type": "Primary"
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          ],
          "cvssMetricV40": [
            {
              "cvssData": {
                "Automatable": "NOT_DEFINED",
                "Recovery": "NOT_DEFINED",
                "Safety": "NOT_DEFINED",
                "attackComplexity": "LOW",
                "attackRequirements": "NONE",
                "attackVector": "NETWORK",
                "availabilityRequirement": "NOT_DEFINED",
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                "baseSeverity": "LOW",
                "confidentialityRequirement": "NOT_DEFINED",
                "exploitMaturity": "PROOF_OF_CONCEPT",
                "integrityRequirement": "NOT_DEFINED",
                "modifiedAttackComplexity": "NOT_DEFINED",
                "modifiedAttackRequirements": "NOT_DEFINED",
                "modifiedAttackVector": "NOT_DEFINED",
                "modifiedPrivilegesRequired": "NOT_DEFINED",
                "modifiedSubAvailabilityImpact": "NOT_DEFINED",
                "modifiedSubConfidentialityImpact": "NOT_DEFINED",
                "modifiedSubIntegrityImpact": "NOT_DEFINED",
                "modifiedUserInteraction": "NOT_DEFINED",
                "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
                "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
                "modifiedVulnIntegrityImpact": "NOT_DEFINED",
                "privilegesRequired": "LOW",
                "providerUrgency": "NOT_DEFINED",
                "subAvailabilityImpact": "NONE",
                "subConfidentialityImpact": "NONE",
                "subIntegrityImpact": "NONE",
                "userInteraction": "NONE",
                "valueDensity": "NOT_DEFINED",
                "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
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            ],
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        ]
      }
    }
  }
}



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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

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