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Public proof of conceptFix available

CVE-2026-107221

Excelize: a row whose earlier cell has a higher column reference than its last cell panics index out of range on almost every worksheet read API

A public proof of concept exists; no exploitation attested.

  • Published2026-10-07
  • WeaknessCWE-787

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. From 2.0.0 to 2.11.0, checkRow sizes its target cell slice from the last cell in XML document order and then re-scatters every cell by its explicit column reference. GetCellValue reaches workSheetReader and checkRow, where targetList is too short for an earlier out-of-order cell. When a crafted row places a higher-column cell before a lower-column final cell and a non-streaming worksheet API reads the sheet, the earlier cell's column index exceeds the slice length derived from the final cell, allowing an attacker to cause an unrecovered panic and terminate the process. No fixed version is available as of this review.

Timeline

dates in UTC
  1. 2026-10-0719:17CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-107221?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-107221?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV
Excelize
BranchAffectedFixed in
2.x≥ 2.0.0, ≤ 2.11.0no fix published
xuri/excelize
BranchAffectedFixed in
2.x≥ 2.0.0, < 2.11.1-0.20260816084418-46a5eb2894482.11.1-0.20260816084418-46a5eb289448

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • NVDCVE recordread 2026-10-23
  • CISA-ADPSSVC decisionpoc2026-10-07
  • OpenCVESSVC decisionpoc—
  • CNACVSS 3.16.5read 2026-10-23
  • CNAweakness (CWE)CWE-787read 2026-10-23
  • FIRST EPSSEPSS score0.3 %2026-10-22
  • OSVaffected packages—

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Published
2026-10-07
Last Modified
2026-10-13
NVD status
Analyzed

Frequently asked questions

What is CVE-2026-107221?

Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. From 2.0.0 to 2.11.0, checkRow sizes its target cell slice from the last cell in XML document order and then re-scatters every cell by its explicit column reference. GetCellValue reaches workSheetReader and checkRow, where targetList is too short for an earlier out-of-order cell. When a crafted row places a higher-column cell before a lower-column final cell and a non-streaming worksheet API reads the sheet, the earlier cell's column index exceeds the slice length derived from the final cell, allowing an attacker to cause an unrecovered panic and terminate the process. No fixed version is available as of this review.

Is CVE-2026-107221 actively exploited?

A proof-of-concept exploit exists for CVE-2026-107221, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2026-107221?

CVE-2026-107221 has a CVSS v3 base score of 6.5 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

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