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FKIE_CVE-2026-88045

Vulnerability from fkie_nvd - Published: 2026-09-10 17:17 - Updated: 2026-09-10 19:54
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
rclone is a command-line program to sync files and directories to and from different cloud storage providers. From 1.75.0 until 1.75.1, the serve S3 streamed multipart path in cmd/serve/s3/multipart.go passes attacker-controlled contentLength to multipart.NewRW().Reserve before reading request-body bytes. waitForTurn admits the current part and one oversized part when the buffer is empty despite --multipart-streaming-buffer-limit, and lib/pool allocates 1 MiB pages according to Content-Length or X-Amz-Decoded-Content-Length. A network client can retain or multiply these reservations without sending the declared body, exhausting process or host memory or permanently blocking request handlers. Anonymous S3 deployments require no credentials, while deployments using auth_key require an accepted S3 key. This issue is fixed in version 1.75.1.
References
security-advisories@github.comhttps://github.com/rclone/rclone/commit/7c1dfd99f3e6a22fcefd8686cc478226a15e63a1
security-advisories@github.comhttps://github.com/rclone/rclone/commit/ab1f458013aaf6356e4bdeca61f7cb9139f8eb86
security-advisories@github.comhttps://github.com/rclone/rclone/issues/9616
security-advisories@github.comhttps://github.com/rclone/rclone/releases/tag/v1.75.1
security-advisories@github.comhttps://github.com/rclone/rclone/security/advisories/GHSA-2p48-j3qc-rx9f
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/rclone/rclone/security/advisories/GHSA-2p48-j3qc-rx9f
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "rclone",
          "vendor": "rclone",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.75.0, \u003c 1.75.1"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "rclone is a command-line program to sync files and directories to and from different cloud storage providers. From 1.75.0 until 1.75.1, the serve S3 streamed multipart path in cmd/serve/s3/multipart.go passes attacker-controlled contentLength to multipart.NewRW().Reserve before reading request-body bytes. waitForTurn admits the current part and one oversized part when the buffer is empty despite --multipart-streaming-buffer-limit, and lib/pool allocates 1 MiB pages according to Content-Length or X-Amz-Decoded-Content-Length. A network client can retain or multiply these reservations without sending the declared body, exhausting process or host memory or permanently blocking request handlers. Anonymous S3 deployments require no credentials, while deployments using auth_key require an accepted S3 key. This issue is fixed in version 1.75.1."
    }
  ],
  "id": "CVE-2026-88045",
  "lastModified": "2026-09-10T19:54:25.810",
  "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"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-88045",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-10T17:31:12.490937Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-10T17:17:08.530",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/rclone/rclone/commit/7c1dfd99f3e6a22fcefd8686cc478226a15e63a1"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/rclone/rclone/commit/ab1f458013aaf6356e4bdeca61f7cb9139f8eb86"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/rclone/rclone/issues/9616"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/rclone/rclone/releases/tag/v1.75.1"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/rclone/rclone/security/advisories/GHSA-2p48-j3qc-rx9f"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/rclone/rclone/security/advisories/GHSA-2p48-j3qc-rx9f"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-789"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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