CVE-2026-107215 (GCVE-0-2026-107215)

Vulnerability from cvelistv5 – Published: 2026-10-07 17:48 – Updated: 2026-10-07 17:48
VLAI
Title
Excelize: extractPart allocates attacker-controlled, unbounded and negative-sized buffers from CFB directory entries: remote panic / OOM DoS
Summary
Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. From 2.3.1 to 2.11.0, extractPart allocates a byte slice directly from an attacker-controlled CFB directory-entry size before validating the sector chain or size domain. extractPart trusts the CFB directory entry streamSize for EncryptionInfo and EncryptedPackage allocations before validating the stream. When a crafted OLE compound file declares a negative or extremely large EncryptionInfo or EncryptedPackage stream size, the declared size reaches make with a negative length or forces a multi-gigabyte allocation, allowing an attacker to panic or exhaust process memory. No fixed version is available as of this review.
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-789 - Memory Allocation with Excessive Size Value
Assigner
References
Impacted products
Vendor Product Version CPE status
qax-os excelize Affected: >= 2.3.1, <= 2.11.0
guessed Create a notification for this product.
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      "providerMetadata": {
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        "shortName": "GitHub_M"
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        "discovery": "UNKNOWN"
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      "title": "Excelize: extractPart allocates attacker-controlled, unbounded and negative-sized buffers from CFB directory entries: remote panic / OOM DoS"
    }
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  "cveMetadata": {
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    "cveId": "CVE-2026-107215",
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    "dateReserved": "2026-10-07T14:34:14.815Z",
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    "state": "PUBLISHED"
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          }
        ],
        "id": "CVE-2026-107215",
        "lastModified": "2026-10-07T18:17:19.213",
        "metrics": {
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        "vulnStatus": "Received",
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            "type": "Primary"
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    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • 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.



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