Read the docs
TI-2026-69274 Aliases CVE-2026-107223GHSA-fq3v-74gv-27gm

Excelize column mutators exhaust CPU and memory on crafted worksheets

Priority LOW 31CWE-789Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-789.

Summary

The Excelize Go library from 2.1.0 through 2.11.0 does not check column ranges loaded from worksheet files against the worksheet column limit. When a crafted worksheet sets an oversized col max attribute and the application calls a column mutator such as SetColWidth, the library expands every column in the range and allocates memory without limit (CWE-789). An attacker who supplies such a file can exhaust CPU and memory or trigger an out-of-memory condition. A public exploit 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 2.1.0 to 2.11.0, flatCols expands file-loaded column ranges without validating Min and Max against the worksheet column limit. SetColWidth reaches flatCols, which expands xlsxCol.Min through xlsxCol.Max without enforcing MaxColumns. When a crafted worksheet supplies an oversized col max attribute and the application invokes a column mutator, flatCols performs a deep copy and append for every attacker-selected column number, allowing an attacker to consume excessive CPU and memory or trigger OOM. No fixed version is available as of this review.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0037 31st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed github.com/xuri/excelize/v2 (Go): 2.11.1-0.20260807015645-a54c578af309

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
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-osexcelize2.1.0 – 2.11.0—No fix listedCNA
—github.com/xuri/excelize/v2 (Go)2.1.0 to before 2.11.1-0.20260807015645-a54c578af3092.11.1-0.20260807015645-a54c578af309Patch availableGHSA-fq3v-74gv-27gm
  • excelize Vendorqax-os Affected 2.1.0 – 2.11.0 Fixed in — No fix listed CNA
  • github.com/xuri/excelize/v2 (Go) Vendor— Affected 2.1.0 to before 2.11.1-0.20260807015645-a54c578af309 Fixed in 2.11.1-0.20260807015645-a54c578af309 Patch available GHSA-fq3v-74gv-27gm

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:excelize:excelize:*:*:*:*:*:go:*:*2.1.0 – 2.11.0Vulnerableqax-os
  • cpe:2.3:a:excelize:excelize:*:*:*:*:*:go:*:* Versions 2.1.0 – 2.11.0 Vulnerable ·qax-os

Remediation

The Go module github.com/xuri/excelize/v2 is fixed in 2.11.1-0.20260807015645-a54c578af309. The sources list no fixed version for excelize.

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

  • Fix · GHSA-fq3v-74gv-27gm github.com/xuri/excelize/v2 (Go) Fixed in 2.11.1-0.20260807015645-a54c578af309 Advisory →

Timeline

  1. 2026-10-07 Threatist record created from CVE-2026-107223
  2. 2026-10-07 Alias added: GHSA-fq3v-74gv-27gm
  3. 2026-10-07 Fix available: Go/github.com/xuri/excelize/[email protected] · GHSA-fq3v-74gv-27gm
  4. 2026-10-07 CVSS score added · GHSA-fq3v-74gv-27gm
  5. 2026-10-07 Weakness changed · GHSA-fq3v-74gv-27gm
  6. 2026-10-07 4 new references · GHSA-fq3v-74gv-27gm
  7. 2026-10-07 CISA SSVC decision points changed
  8. 2026-10-07 Priority changed: MEDIUM → LOW
  9. 2026-10-13 CVSS score added · NVD

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-2026-69266 Integer overflow in Excelize column parsing causes process panic CVSS 3.1HIGH 7.5
  • 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
See all 17 →

Sources

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