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CVE-2026-107217

HIGH 7.5

Published 2026-10-07 · Last modified 2026-10-08

Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. From 2.0.0 to 2.11.0 in github.com/xuri/excelize/v2 and from 1.1.0 to 1.4.1 in github.com/xuri/excelize, ColumnNameToNumber accumulates a bijective base-26 value in int64 without detecting overflow, allowing an invalid long column name to wrap to zero with no error. ColumnNameToNumber accepts the overflowing name VGWQHXLSDVIKWV, after which checkSheetR0 and xlsxWorksheet.checkRow use the wrapped column value as an index. When a crafted worksheet uses an overflowing column name in a row normalized by checkSheetR0 or checkRow, the wrapped zero column becomes a negative slice index during worksheet normalization, allowing an attacker to panic and 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

0.4%chance of exploitation in 30 days · 30th 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

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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-190: : Integer Overflow or Wraparound
  • CWE-129: : Improper Validation of Array Index

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): 2.0.0
    • Fixed boundary (excluded): 2.11.1-0.20260910071107-696050fbf14e
    Additional upstream package constraints
    {
  "database": {
    "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-c85p-xxjj-2r75/GHSA-c85p-xxjj-2r75.json"
  }
}
    GitHub Advisory Database · GHSA-c85p-xxjj-2r75 · Updated 2026-10-07T20:30:05.831565732Z
  • github.com/xuri/excelize Go

    pkg:golang/github.com/xuri/excelize

    SEMVER range
    • Introduced version (included): 1.1.0
    • Last affected version (included): 1.4.1
    Additional upstream package constraints
    {
  "database": {
    "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-c85p-xxjj-2r75/GHSA-c85p-xxjj-2r75.json"
  }
}
    GitHub Advisory Database · GHSA-c85p-xxjj-2r75 · Updated 2026-10-07T20:30:05.831565732Z

Known Affected Software Configurations

VendorProductVersion range
ExcelizeExcelize≥ 1.1.0 and ≤ 1.4.1
ExcelizeExcelize≥ 2.0.0 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