Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-107219

CVE-2026-107219HIGH

qax-os excelize — Excelize: Unbounded spinCount in agile decryption burns CPU during OpenFile

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  N  N  H    7.5   .0034   25.7     —

AFFECTED
  Product   Versions               Fixed
  excelize  >= 2.3.1, <= 2.11.0 –  —

TIMELINE
  Oct 7   Reserved by GitHub_M
  Oct 7   Published (CNA: GitHub_M)
  Oct 13  EXPLOIT PUBLISHED — CVE-2026-107219 (qax-os excelize). Public exploit reference added.

CWE-400 · CNA: GitHub_M · CVSS v3.1 · 3 references · NVD status: Analyzed

Description

Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. From 2.3.1 to 2.11.0, agile decryption accepts an attacker-controlled spinCount and performs that many password-key derivation iterations before verifier validation. OpenFile reaches agileDecrypt, which passes the unbounded spinCount to convertPasswdToKey before password verification. When a crafted OLE encrypted-workbook header supplies an excessive spinCount and the file is opened, the key-derivation loop performs unbounded attacker-selected work and cannot be cancelled, allowing an attacker to consume a CPU core for an attacker-controlled duration. No fixed version is available as of this review.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
October 7, 2026	Reserved	Reserved by GitHub_M
October 7, 2026	Published	Published (CNA: GitHub_M)
October 13, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-107219 (qax-os excelize). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
qax-os	excelize	—	>= 2.3.1, <= 2.11.0	—

Weaknesses

CWE-400

References (3)

https://github.com/qax-os/excelize/commit/2badfcd5841d0d88b0ffea119f5a2f3c53b4910b [Patch]
https://github.com/qax-os/excelize/pull/2389 [Issue Tracking, Patch]
https://github.com/qax-os/excelize/security/advisories/GHSA-jrfj-fhj2-jjvm [Exploit, Vendor Advisory]

Authoritative record: CVE-2026-107219 at cve.org

Vendors: qax-os

Weaknesses: CWE-400

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-107219 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.