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TI-2026-69260 Aliases CVE-2026-107212GHSA-jw42-f3rr-4cc3

Unbounded row number in Excelize lets crafted spreadsheets hang reads

Priority HIGH 72CWE-770Published · 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-770.

Summary

Excelize, a Go library for reading and writing Excel spreadsheets, is affected from 2.1.0 through 2.11.0. Rows.Columns accepts a row number above TotalRows that Rows.Next would reject, so the row iterator steps through every missing row number (CWE-770). A remote attacker without privileges or user interaction can make an application that calls GetRows or iterates Rows consume a CPU core for an attacker-controlled duration by supplying a crafted workbook. 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, Rows.Columns accepts a look-ahead row number above TotalRows without applying the limit enforced by Rows.Next. File.GetRows relies on Rows.Next and Rows.Columns, but Rows.Columns consumes the row r attribute without the limit check in Rows.Next. When a crafted worksheet places an oversized row number after an ordinary valid row and the application calls GetRows or iterates Rows, the iterator advances through every missing row number instead of rejecting the workbook, allowing an attacker to consume a CPU core for an attacker-controlled duration. 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): 2.11.1-0.20260930021559-01a9ff32fb3c

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-osexcelize2.1.0 – 2.11.0—No fix listedCNA
—github.com/xuri/excelize/v2 (Go)2.1.0 to before 2.11.1-0.20260930021559-01a9ff32fb3c2.11.1-0.20260930021559-01a9ff32fb3cPatch availableGHSA-jw42-f3rr-4cc3
  • 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 2.11.1-0.20260930021559-01a9ff32fb3c Fixed in 2.11.1-0.20260930021559-01a9ff32fb3c Patch available GHSA-jw42-f3rr-4cc3

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

Update the Go module github.com/xuri/excelize/v2 to 2.11.1-0.20260930021559-01a9ff32fb3c, which fixes the flaw. The sources list no fixed version for excelize.

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

  • Fix · GHSA-jw42-f3rr-4cc3 github.com/xuri/excelize/v2 (Go) Fixed in 2.11.1-0.20260930021559-01a9ff32fb3c Advisory →

Timeline

  1. 2026-10-07 Threatist record created from CVE-2026-107212
  2. 2026-10-07 CISA SSVC decision points changed
  3. 2026-10-07 Priority changed: MEDIUM → HIGH
  4. 2026-10-08 Alias added: GHSA-jw42-f3rr-4cc3
  5. 2026-10-08 Fix available: Go/github.com/xuri/excelize/[email protected] · GHSA-jw42-f3rr-4cc3
  6. 2026-10-08 CVSS score added · GHSA-jw42-f3rr-4cc3
  7. 2026-10-08 Weakness changed · GHSA-jw42-f3rr-4cc3
  8. 2026-10-08 5 new references · GHSA-jw42-f3rr-4cc3

References

Exploit 1

Patch 2

Advisory 1

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-2026-38996 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