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CVE-2026-107214

HIGH 7.5

Published 2026-10-07 · Last modified 2026-10-07

Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. From 2.3.1 to 2.11.0, the decryption dispatch performs insufficient structural and parameter validation before standard and agile decryptors slice, index, allocate, and divide using attacker-controlled values. Decrypt passes attacker-controlled EncryptionInfo and EncryptedPackage data into standardDecrypt or agileDecrypt before validating the structures used by those routines. When a malformed OLE compound file with a version-valid EncryptionInfo stream is opened or passed to Decrypt, nine malformed-input classes reach unrecovered Go runtime panics instead of the documented error path, allowing an attacker to terminate the calling process. No fixed version is available as of this review.

ELEVATED IMPACT

Severe if exploited (CVSS 7.5), but no known exploitation and low modeled probability. Patch on a normal cadence.

Exploitation likelihood

0.2%chance of exploitation in 30 days · 15th percentile

○ In CISA KEV ○ Catalogued PoC

Impact if exploited

7.5CVSS 3.1 · HIGH

  • ConfidentialityNone
  • IntegrityNone
  • AvailabilityHigh

What an attacker needs

  • ✓Access: Reachable over the network — no local access needed
  • ✓Privileges: No account or privileges required
  • ✓User interaction: No user interaction needed
  • ✓Complexity: No special conditions — reliably repeatable

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

Search for new PoCs

Search GitHub now — results may be empty or unverified.

Tracked sources are checked daily for recent CVEs, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Data snapshot:

Affected

Vendors Qax Os Excelize

Products Excelize

Weakness (CWE)

  • CWE-248: : Uncaught Exception

CVSS vector

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

References and research data (JSON)

Packages and version ranges

Each advisory describes its own package and affected ranges. A boundary applies to that range; it is not a universal upgrade recommendation.

  • github.com/xuri/excelize/v2 Go

    pkg:golang/github.com/xuri/excelize/v2

    SEMVER range
    • Introduced version (included): 2.3.1
    • Fixed boundary (excluded): 2.11.1-0.20260915055537-22f76f9acb94
    Additional upstream package constraints
    {
  "database": {
    "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-2j4c-ffch-9f23/GHSA-2j4c-ffch-9f23.json"
  }
}
    GitHub Advisory Database · GHSA-2j4c-ffch-9f23 · Updated 2026-10-19T21:40:56.735377549Z
  • github.com/360EntSecGroup-Skylar/excelize/v2 Go

    pkg:golang/github.com/360EntSecGroup-Skylar/excelize/v2

    SEMVER range
    • Introduced version (included): 2.3.1
    Additional upstream package constraints
    {
  "ecosystem": {
    "imports": [
      {
        "path": "github.com/360EntSecGroup-Skylar/excelize/v2",
        "symbols": [
          "Decrypt",
          "Encrypt",
          "File.Save",
          "File.SaveAs",
          "File.Write",
          "File.WriteTo",
          "File.WriteToBuffer",
          "OpenFile",
          "OpenReader",
          "agileDecrypt",
          "convertPasswdToKey",
          "createIV",
          "crypt",
          "cryptPackage",
          "standardConvertPasswdToKey",
          "standardDecrypt"
        ]
      }
    ]
  },
  "database": {
    "source": "https://vuln.go.dev/ID/GO-2026-6684.json"
  }
}
    Go Vulnerability Database · GO-2026-6684 · Updated 2026-10-19T21:31:35.702899949Z
  • github.com/xuri/excelize/v2 Go

    pkg:golang/github.com/xuri/excelize/v2

    SEMVER range
    • All earlier versions (introduced 0)
    • Fixed boundary (excluded): 2.11.1-0.20260915055537-22f76f9acb94
    Additional upstream package constraints
    {
  "ecosystem": {
    "imports": [
      {
        "path": "github.com/xuri/excelize/v2",
        "symbols": [
          "Decrypt",
          "Encrypt",
          "File.Save",
          "File.SaveAs",
          "File.Write",
          "File.WriteTo",
          "File.WriteToBuffer",
          "OpenFile",
          "OpenReader",
          "agileDecrypt",
          "convertPasswdToKey",
          "createIV",
          "decrypt",
          "decryptPackage",
          "standardConvertPasswdToKey",
          "standardDecrypt"
        ]
      }
    ]
  },
  "database": {
    "source": "https://vuln.go.dev/ID/GO-2026-6684.json"
  }
}
    Go Vulnerability Database · GO-2026-6684 · Updated 2026-10-19T21:31:35.702899949Z

Known Affected Software Configurations

VendorProductVersion range
ExcelizeExcelize≥ 2.3.1 and ≤ 2.11.0

All CVSS metrics

  • HIGH 7.5 v3.1 · CNA Primary
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • HIGH 7.5 v3.1 · NVD Secondary
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Exploit-tagged references (not proof of a PoC)

Patches & mitigations

Advisories

Technical & other

Sources: NVD · CVE.org · EPSS