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TI-2026-69266 Aliases CVE-2026-107217GHSA-c85p-xxjj-2r75

Integer overflow in Excelize column parsing causes process panic

Priority HIGH 72CWE-129Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-129 and the CVSS impact.

Summary

Excelize, a Go spreadsheet library, is affected in github.com/xuri/excelize/v2 from 2.0.0 before 2.11.1-0.20260910071107-696050fbf14e and github.com/xuri/excelize from 1.1.0 through 1.4.1. Its ColumnNameToNumber function uses int64 without overflow checks (CWE-190), so a long column name wraps to zero silently. A remote attacker with a crafted worksheet can panic the calling process via a negative slice index. A public proof of concept is linked in the references.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00363 30th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed github.com/xuri/excelize/v2 (Go): 2.11.1-0.20260910071107-696050fbf14e

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
qax-osexcelize2.0.0 – 2.11.0; 1.1.0 – 1.4.1—No fix listedCNA
—github.com/xuri/excelize/v2 (Go)2.0.0 to before 2.11.1-0.20260910071107-696050fbf14e2.11.1-0.20260910071107-696050fbf14ePatch availableGHSA-c85p-xxjj-2r75
—github.com/xuri/excelize (Go)1.1.0 – 1.4.1—No fix listedGHSA-c85p-xxjj-2r75
  • excelize Vendorqax-os Affected 2.0.0 – 2.11.0; 1.1.0 – 1.4.1 Fixed in — No fix listed CNA
  • github.com/xuri/excelize/v2 (Go) Vendor— Affected 2.0.0 to before 2.11.1-0.20260910071107-696050fbf14e Fixed in 2.11.1-0.20260910071107-696050fbf14e Patch available GHSA-c85p-xxjj-2r75
  • github.com/xuri/excelize (Go) Vendor— Affected 1.1.0 – 1.4.1 Fixed in — No fix listed GHSA-c85p-xxjj-2r75

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:excelize:excelize:*:*:*:*:*:go:*:*1.1.0 – 1.4.1; 2.0.0 – 2.11.0Vulnerableqax-os
  • cpe:2.3:a:excelize:excelize:*:*:*:*:*:go:*:* Versions 1.1.0 – 1.4.1; 2.0.0 – 2.11.0 Vulnerable ·qax-os

Remediation

Upgrade github.com/xuri/excelize/v2 to 2.11.1-0.20260910071107-696050fbf14e. The sources list no fixed version for excelize. The sources list no fixed version for github.com/xuri/excelize.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · GHSA-c85p-xxjj-2r75 github.com/xuri/excelize/v2 (Go) Fixed in 2.11.1-0.20260910071107-696050fbf14e Advisory →

Timeline

  1. 2026-10-07 Threatist record created from CVE-2026-107217
  2. 2026-10-07 Alias added: GHSA-c85p-xxjj-2r75
  3. 2026-10-07 Fix available: Go/github.com/xuri/excelize/[email protected] · GHSA-c85p-xxjj-2r75
  4. 2026-10-07 CVSS score added · GHSA-c85p-xxjj-2r75
  5. 2026-10-07 Weakness changed · GHSA-c85p-xxjj-2r75
  6. 2026-10-07 4 new references · GHSA-c85p-xxjj-2r75
  7. 2026-10-08 CISA SSVC decision points changed
  8. 2026-10-08 Priority changed: MEDIUM → HIGH

References

Exploit 1

Patch 2

Other 1

  • TI-2026-42325 Excelize: Streaming GetRows row-bound bypass causes attacker-controlled allocation CVSS 4.0HIGH 8.7
  • TI-2026-69263 Excelize crafted OLE files cause memory exhaustion and panic CVSS 3.1HIGH 7.5
  • TI-2026-69262 Unrecoverable panics in Excelize Decrypt on malformed OLE workbooks CVSS 3.1HIGH 7.5
  • TI-2026-69260 Unbounded row number in Excelize lets crafted spreadsheets hang reads CVSS 3.1HIGH 7.5
  • TI-2026-38996 Excelize: Unbounded Row Index Allocation in Worksheet Parser (checkSheet OOM/Panic DoS) CVSS 3.1HIGH 7.5
  • TI-2026-42326 Excelize: Negative shared-string index causes panic in GetCellValue and GetRows CVSS 4.0MEDIUM 6.9
See all 17 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences