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.
Published: 2026-10-07
Score: 7.5 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-jrfj-fhj2-jjvm Excelize: Unbounded spinCount in agile decryption burns CPU during OpenFile
History

Wed, 07 Oct 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 07 Oct 2026 20:15:00 +0000

Type Values Removed Values Added
First Time appeared Qax-os
Qax-os excelize
Vendors & Products Qax-os
Qax-os excelize

Wed, 07 Oct 2026 18:45:00 +0000

Type Values Removed Values Added
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.
Title Excelize: Unbounded spinCount in agile decryption burns CPU during OpenFile
Weaknesses CWE-400
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-10-07T19:45:16.819Z

Reserved: 2026-10-07T14:34:14.816Z

Link: CVE-2026-107219

cve-icon Vulnrichment

Updated: 2026-10-07T19:44:58.740Z

cve-icon NVD

Status : Received

Published: 2026-10-07T19:17:34.287

Modified: 2026-10-07T20:17:11.450

Link: CVE-2026-107219

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-07T20:00:12Z

Weaknesses