CVE-2026-59162 Excelize: Negative shared-string index causes panic in GetCellValue and GetRows
A malicious XLSX file with a negative shared-string index causes a panic in the Excelize Go library, leading to denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-59162?
CVE-2026-59162 is a medium-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, Excelize parses shared-string cell values with strconv.Atoi and checks only the upper bound before indexing the shared string slice, allowing an XLSX file containing a shared-string cell with -1 to trigger sharedStrings[-1] and panic when read through GetCellValue or GetRows. This issue is fixed in version 2.11.0.
Which versions are affected by CVE-2026-59162?
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-2026-59162?
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-2026-59162 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-59162 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-2026-59161 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-fx5j-qcqg-grpf, GO-2026-6452.