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TI-2026-69262 Aliases CVE-2026-107214GHSA-2j4c-ffch-9f23

Unrecoverable panics in Excelize Decrypt on malformed OLE workbooks

Priority HIGH 72CWE-248Published · 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-248.

Summary

Excelize, a Go library for Microsoft Excel spreadsheets, is affected from 2.3.1 through 2.11.0. Its Decrypt function uses attacker-controlled encryption data before validating its structure, so malformed input causes unrecovered runtime panics instead of an error (CWE-248). A remote unauthenticated attacker can terminate the calling process by supplying a malformed OLE compound file with a valid EncryptionInfo stream. 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 2.3.1 to 2.11.0, the decryption dispatch performs insufficient structural and parameter validation before standard and agile decryptors slice, index, allocate, and divide using attacker-controlled values. Decrypt passes attacker-controlled EncryptionInfo and EncryptedPackage data into standardDecrypt or agileDecrypt before validating the structures used by those routines. When a malformed OLE compound file with a version-valid EncryptionInfo stream is opened or passed to Decrypt, nine malformed-input classes reach unrecovered Go runtime panics instead of the documented error path, allowing an attacker to 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 0.0024 15th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed github.com/xuri/excelize/v2 (Go): 2.11.1-0.20260915055537-22f76f9acb94

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-osexcelize2.3.1 – 2.11.0—No fix listedCNA
—github.com/xuri/excelize/v2 (Go)2.3.1 to before 2.11.1-0.20260915055537-22f76f9acb942.11.1-0.20260915055537-22f76f9acb94Patch availableGHSA-2j4c-ffch-9f23
  • excelize Vendorqax-os Affected 2.3.1 – 2.11.0 Fixed in — No fix listed CNA
  • github.com/xuri/excelize/v2 (Go) Vendor— Affected 2.3.1 to before 2.11.1-0.20260915055537-22f76f9acb94 Fixed in 2.11.1-0.20260915055537-22f76f9acb94 Patch available GHSA-2j4c-ffch-9f23

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:excelize:excelize:*:*:*:*:*:go:*:*2.3.1 – 2.11.0Vulnerableqax-os
  • cpe:2.3:a:excelize:excelize:*:*:*:*:*:go:*:* Versions 2.3.1 – 2.11.0 Vulnerable ·qax-os

Remediation

Upgrade github.com/xuri/excelize/v2 to 2.11.1-0.20260915055537-22f76f9acb94, the fixed version. The sources list no fixed version for excelize.

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

  • Fix · GHSA-2j4c-ffch-9f23 github.com/xuri/excelize/v2 (Go) Fixed in 2.11.1-0.20260915055537-22f76f9acb94 Advisory →

Timeline

  1. 2026-10-07 Threatist record created from CVE-2026-107214
  2. 2026-10-07 CISA SSVC decision points changed
  3. 2026-10-07 Priority changed: MEDIUM → HIGH
  4. 2026-10-08 Alias added: GHSA-2j4c-ffch-9f23
  5. 2026-10-08 Fix available: Go/github.com/xuri/excelize/[email protected] · GHSA-2j4c-ffch-9f23
  6. 2026-10-08 CVSS score added · GHSA-2j4c-ffch-9f23
  7. 2026-10-08 Weakness changed · GHSA-2j4c-ffch-9f23
  8. 2026-10-08 5 new references · GHSA-2j4c-ffch-9f23

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-2026-69260 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