Vulnerability-Lookup

CVE-2026-113658 (GCVE-0-2026-113658)

Vulnerability from cvelistv5 – Published: 2026-10-20 16:56 – Updated: 2026-10-20 16:59

Title

ApostropheCMS: Unauthenticated CSV import requests leave rejected uploads in the system temporary directory

Summary

ApostropheCMS is an open-source Node.js content management system. Prior to 4.33.0, the unauthenticated Rich Text CSV conversion route writes a multipart upload to the system temporary directory before checking its extension and does not remove the staged file when that validation rejects it. Repeated large rejected uploads, using the normal public CSRF cookie, can persistently consume temporary-disk capacity and may disrupt ApostropheCMS and other services that depend on the same partition. This issue is fixed in version 4.33.0.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-400 - Uncontrolled Resource Consumption
CWE-459 - Incomplete Cleanup
CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7654 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/apostrophecms/apostrophe/secur…	x_refsource_CONFIRM
https://github.com/apostrophecms/apostrophe/commi…	x_refsource_MISC
https://github.com/apostrophecms/apostrophe/commi…	x_refsource_MISC
https://github.com/apostrophecms/apostrophe/relea…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
apostrophecms	apostrophe	Affected: < 4.33.0	guessed

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "apostrophe",
          "vendor": "apostrophecms",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 4.33.0"
            }
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        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "ApostropheCMS is an open-source Node.js content management system. Prior to 4.33.0, the unauthenticated Rich Text CSV conversion route writes a multipart upload to the system temporary directory before checking its extension and does not remove the staged file when that validation rejects it. Repeated large rejected uploads, using the normal public CSRF cookie, can persistently consume temporary-disk capacity and may disrupt ApostropheCMS and other services that depend on the same partition. This issue is fixed in version 4.33.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-400",
              "description": "CWE-400: Uncontrolled Resource Consumption",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-459",
              "description": "CWE-459: Incomplete Cleanup",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-770",
              "description": "CWE-770: Allocation of Resources Without Limits or Throttling",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-20T16:59:01.643Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-qhcq-9pm2-c9w9",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-qhcq-9pm2-c9w9"
        },
        {
          "name": "https://github.com/apostrophecms/apostrophe/commit/9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/apostrophecms/apostrophe/commit/9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce"
        },
        {
          "name": "https://github.com/apostrophecms/apostrophe/commit/f84fd41cbf6c22eb8d0008fc9c25df1f7130b350",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/apostrophecms/apostrophe/commit/f84fd41cbf6c22eb8d0008fc9c25df1f7130b350"
        },
        {
          "name": "https://github.com/apostrophecms/apostrophe/releases/tag/apostrophe@4.33.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/apostrophecms/apostrophe/releases/tag/apostrophe@4.33.0"
        }
      ],
      "source": {
        "advisory": "GHSA-qhcq-9pm2-c9w9",
        "discovery": "UNKNOWN"
      },
      "title": "ApostropheCMS: Unauthenticated CSV import requests leave rejected uploads in the system temporary directory"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-113658",
    "datePublished": "2026-10-20T16:56:01.862Z",
    "dateReserved": "2026-10-20T14:27:46.641Z",
    "dateUpdated": "2026-10-20T16:59:01.643Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "apostrophe",
                "vendor": "apostrophecms",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003c 4.33.0"
                  }
                ]
              }
            ],
            "source": "security-advisories@github.com"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "ApostropheCMS is an open-source Node.js content management system. Prior to 4.33.0, the unauthenticated Rich Text CSV conversion route writes a multipart upload to the system temporary directory before checking its extension and does not remove the staged file when that validation rejects it. Repeated large rejected uploads, using the normal public CSRF cookie, can persistently consume temporary-disk capacity and may disrupt ApostropheCMS and other services that depend on the same partition. This issue is fixed in version 4.33.0."
          }
        ],
        "id": "CVE-2026-113658",
        "lastModified": "2026-10-20T19:53:10.247",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 7.5,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 3.6,
              "source": "security-advisories@github.com",
              "type": "Secondary"
            }
          ]
        },
        "published": "2026-10-20T17:17:36.917",
        "references": [
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/apostrophecms/apostrophe/commit/9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/apostrophecms/apostrophe/commit/f84fd41cbf6c22eb8d0008fc9c25df1f7130b350"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/apostrophecms/apostrophe/releases/tag/apostrophe@4.33.0"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-qhcq-9pm2-c9w9"
          }
        ],
        "sourceIdentifier": "security-advisories@github.com",
        "vulnStatus": "Deferred",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-400"
              },
              {
                "lang": "en",
                "value": "CWE-459"
              },
              {
                "lang": "en",
                "value": "CWE-770"
              }
            ],
            "source": "security-advisories@github.com",
            "type": "Primary"
          }
        ]
      }
    }
  }
}

FKIE_CVE-2026-113658

Vulnerability from fkie_nvd - Published: 2026-10-20 17:17 - Updated: 2026-10-20 19:53

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/apostrophecms/apostrophe/commit/9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce
	security-advisories@github.com	https://github.com/apostrophecms/apostrophe/commit/f84fd41cbf6c22eb8d0008fc9c25df1f7130b350
	security-advisories@github.com	https://github.com/apostrophecms/apostrophe/releases/tag/apostrophe@4.33.0
	security-advisories@github.com	https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-qhcq-9pm2-c9w9

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "apostrophe",
          "vendor": "apostrophecms",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 4.33.0"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "ApostropheCMS is an open-source Node.js content management system. Prior to 4.33.0, the unauthenticated Rich Text CSV conversion route writes a multipart upload to the system temporary directory before checking its extension and does not remove the staged file when that validation rejects it. Repeated large rejected uploads, using the normal public CSRF cookie, can persistently consume temporary-disk capacity and may disrupt ApostropheCMS and other services that depend on the same partition. This issue is fixed in version 4.33.0."
    }
  ],
  "id": "CVE-2026-113658",
  "lastModified": "2026-10-20T19:53:10.247",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-10-20T17:17:36.917",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/apostrophecms/apostrophe/commit/9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/apostrophecms/apostrophe/commit/f84fd41cbf6c22eb8d0008fc9c25df1f7130b350"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/apostrophecms/apostrophe/releases/tag/apostrophe@4.33.0"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-qhcq-9pm2-c9w9"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        },
        {
          "lang": "en",
          "value": "CWE-459"
        },
        {
          "lang": "en",
          "value": "CWE-770"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}

GHSA-QHCQ-9PM2-C9W9

Vulnerability from github – Published: 2026-10-20 18:10 – Updated: 2026-10-20 18:10

Summary

ApostropheCMS: Unauthenticated CSV import requests leave rejected uploads in the system temporary directory

Details

Summary

A rejected upload can remain in the operating system temporary directory.

Multer writes the file before its extension is checked, and the rejection path does not remove that temporary file. An unauthenticated requester can repeat this with large files and steadily consume temporary disk space.

Details

The endpoint is:

POST /api/v1/@apostrophecms/rich-text-widget/generate-csv-table

In packages/apostrophe/modules/@apostrophecms/rich-text-widget/lib/apiRoutes.js, Multer first writes the upload to os.tmpdir(). The handler then rejects filenames whose extension is not csv, but there is no cleanup of the Multer file on this error path.

The route does not require an authenticated user. A normal CSRF cookie is sufficient.

During testing, the request returned HTTP 400 with Only csv files are supported, while the complete uploaded content remained in a randomly named file in the configured temporary directory after the response.

Relationship to prior public work

I reviewed PR #5013, which migrated the Rich Text CSV upload path from connect-multiparty to Multer. This report concerns cleanup after that migration: the rejected Multer file remains on disk, a behavior not described in the PR or its review discussion.

POC

Create a small test file. A larger file can be used to demonstrate disk growth, but 1 MiB is enough for a safe local reproduction:

dd if=/dev/zero of=rejected.txt bs=1M count=1

Obtain the normal site cookies and send the rejected upload:

curl -c cookies.txt 'http://127.0.0.1:3000/' > /dev/null

curl -i -b cookies.txt \
  -F 'file=@rejected.txt;filename=rejected.txt;type=text/plain' \
  'http://127.0.0.1:3000/api/v1/@apostrophecms/rich-text-widget/generate-csv-table'

The response is HTTP 400. Compare the contents of the system temporary directory before and after the request:

ls -lt /tmp

A new randomly named file remains present and contains the uploaded bytes.

No login is required. Repeating the multipart request creates additional persistent temporary files.

Impact

A remote unauthenticated attacker can fill the partition used by the operating system temporary directory. Once that partition is exhausted, Apostrophe and unrelated services on the same host may fail to upload files, create temporary data, or continue operating normally.

The attack requires only repeated HTTP requests and the stored files remain after each rejected response.

Severity

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "apostrophe"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.33.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-113658"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400",
      "CWE-459",
      "CWE-770"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-10-20T18:10:32Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "### Summary\n\nA rejected upload can remain in the operating system temporary directory.\n\nMulter writes the file before its extension is checked, and the rejection path does not remove that temporary file. An unauthenticated requester can repeat this with large files and steadily consume temporary disk space.\n\n### Details\n\nThe endpoint is:\n\n```text\nPOST /api/v1/@apostrophecms/rich-text-widget/generate-csv-table\n```\n\nIn `packages/apostrophe/modules/@apostrophecms/rich-text-widget/lib/apiRoutes.js`, Multer first writes the upload to `os.tmpdir()`. The handler then rejects filenames whose extension is not `csv`, but there is no cleanup of the Multer file on this error path.\n\nThe route does not require an authenticated user. A normal CSRF cookie is sufficient.\n\nDuring testing, the request returned HTTP 400 with `Only csv files are supported`, while the complete uploaded content remained in a randomly named file in the configured temporary directory after the response.\n\n### Relationship to prior public work\n\nI reviewed [PR #5013](https://github.com/apostrophecms/apostrophe/pull/5013), which migrated the Rich Text CSV upload path from `connect-multiparty` to Multer. This report concerns cleanup after that migration: the rejected Multer file remains on disk, a behavior not described in the PR or its review discussion.\n\n### POC\n\nCreate a small test file. A larger file can be used to demonstrate disk growth, but 1 MiB is enough for a safe local reproduction:\n\n```bash\ndd if=/dev/zero of=rejected.txt bs=1M count=1\n```\n\nObtain the normal site cookies and send the rejected upload:\n\n```bash\ncurl -c cookies.txt \u0027http://127.0.0.1:3000/\u0027 \u003e /dev/null\n\ncurl -i -b cookies.txt \\\n  -F \u0027file=@rejected.txt;filename=rejected.txt;type=text/plain\u0027 \\\n  \u0027http://127.0.0.1:3000/api/v1/@apostrophecms/rich-text-widget/generate-csv-table\u0027\n```\n\nThe response is HTTP 400. Compare the contents of the system temporary directory before and after the request:\n\n```bash\nls -lt /tmp\n```\n\nA new randomly named file remains present and contains the uploaded bytes.\n\nNo login is required. Repeating the multipart request creates additional persistent temporary files.\n\n### Impact\n\nA remote unauthenticated attacker can fill the partition used by the operating system temporary directory. Once that partition is exhausted, Apostrophe and unrelated services on the same host may fail to upload files, create temporary data, or continue operating normally.\n\nThe attack requires only repeated HTTP requests and the stored files remain after each rejected response.",
  "id": "GHSA-qhcq-9pm2-c9w9",
  "modified": "2026-10-20T18:10:32Z",
  "published": "2026-10-20T18:10:32Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-qhcq-9pm2-c9w9"
    },
    {
      "type": "WEB",
      "url": "https://github.com/apostrophecms/apostrophe/commit/9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce"
    },
    {
      "type": "WEB",
      "url": "https://github.com/apostrophecms/apostrophe/commit/f84fd41cbf6c22eb8d0008fc9c25df1f7130b350"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/apostrophecms/apostrophe"
    },
    {
      "type": "WEB",
      "url": "https://github.com/apostrophecms/apostrophe/releases/tag/apostrophe@4.33.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "ApostropheCMS: Unauthenticated CSV import requests leave rejected uploads in the system temporary directory"
}

Sightings

Author	Source	Type	Date	Other

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.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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CVE-2026-113658 (GCVE-0-2026-113658)

FKIE_CVE-2026-113658

GHSA-QHCQ-9PM2-C9W9

Summary

Details

Relationship to prior public work

POC

Impact

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour