CVE-2026-107219 Excelize: Unbounded spinCount in agile decryption burns CPU during OpenFile
An attacker can cause CPU exhaustion in applications using Excelize by providing a crafted Excel file with an excessive spinCount during decryption.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-107219?
CVE-2026-107219 is a high-severity denial of service vulnerability in qax-os excelize, published on 7 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-400
Which versions are affected by CVE-2026-107219?
2 open source packages ship an affected version, including github.com/xuri/excelize/v2. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/xuri/excelize/v2 Go | From 2.3.1 | 2.11.1-0.20260906004932-2badfcd5841d |
github.com/xuri/excelize/v2 Go | From 2.3.1 | 2.11.1-0.20260906004932-2badfcd5841d |
Products include Excelize Excelize.
How do I fix CVE-2026-107219?
Upgrade github.com/xuri/excelize/v2 to 2.11.1-0.20260906004932-2badfcd5841d or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-107219 being exploited?
There is no known exploitation of CVE-2026-107219 in the wild and no public exploit code.
Other vulnerabilities in qax-os excelize
- CVE-2026-107211 Excelize: Unchecked pivot-cache field index in extractPivotTableFields causes unrecoverable panic
- CVE-2026-107213 Excelize: Nil-pointer dereference in GetSlicers when a worksheet has extLst present but no drawing element
- CVE-2026-59161 Excelize: Streaming GetRows row-bound bypass causes attacker-controlled allocation
- CVE-2026-107212 Excelize: Unbounded row number in Rows.Columns makes GetRows and the Rows iterator loop for days
- CVE-2026-107214 Excelize Decrypt: unrecoverable panics on malformed OLE/CFB encrypted workbooks
Sources
Also known as GHSA-jrfj-fhj2-jjvm.