CVE-2026-59161 Excelize: Streaming GetRows row-bound bypass causes attacker-controlled allocation
An attacker can cause excessive memory and CPU consumption in applications using the Excelize library by providing a crafted XLSX file with invalid row indices.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-59161?
CVE-2026-59161 is a high-severity denial of service vulnerability in qax-os excelize, published on 10 Jul 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. Prior to 2.11.0, the streaming worksheet reader used by Rows and GetRows does not enforce the TotalRows limit on the row r attribute, allowing a small XLSX file with a row number above 1048576 and no cell coordinate to make GetRows append empty rows up to the attacker-controlled index and consume excessive memory and CPU. This issue is fixed in version 2.11.0.
Which versions are affected by CVE-2026-59161?
5 open source packages ship an affected version, including github.com/xuri/excelize/v2 and github.com/xuri/excelize. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/xuri/excelize/v2 Go | All versions | 2.11.0 |
github.com/xuri/excelize/v2 Go | All versions | 2.11.0 |
github.com/xuri/excelize/v2 Go | All versions | 2.11.0 |
github.com/xuri/excelize Go | All versions to 1.4.0 | None |
github.com/xuri/excelize Go | All versions to 1.4.0 | None |
Products include Excelize Excelize.
How do I fix CVE-2026-59161?
Upgrade github.com/xuri/excelize/v2 to 2.11.0 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-2026-59161 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-59161 exists.
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-2026-107212 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
- CVE-2026-107215 Excelize: extractPart allocates attacker-controlled, unbounded and negative-sized buffers from CFB directory entries: remote panic / OOM DoS
Sources
Also known as GHSA-q5j5-6p94-4gwc, GO-2026-6453.