CVE-2026-107214 Excelize Decrypt: unrecoverable panics on malformed OLE/CFB encrypted workbooks
Attackers can crash applications using the Excelize library by providing malformed encrypted Excel files, causing unrecoverable panics.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-107214?
CVE-2026-107214 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, the decryption dispatch performs insufficient structural and parameter validation before standard and agile decryptors slice, index, allocate, and divide using attacker-controlled values. Decrypt passes attacker-controlled EncryptionInfo and EncryptedPackage data into standardDecrypt or agileDecrypt before validating the structures used by those routines. When a malformed OLE compound file with a version-valid EncryptionInfo stream is opened or passed to Decrypt, nine malformed-input classes reach unrecovered Go runtime panics instead of the documented error path, allowing an attacker to terminate the calling process. No fixed version is available as of this review.
Weakness: CWE-248
Which versions are affected by CVE-2026-107214?
4 open source packages ship an affected version, including github.com/xuri/excelize/v2 and github.com/360EntSecGroup-Skylar/excelize/v2. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/xuri/excelize/v2 Go | All versions | 2.11.1-0.20260915055537-22f76f9acb94 |
github.com/xuri/excelize/v2 Go | From 2.3.1 | 2.11.1-0.20260915055537-22f76f9acb94 |
github.com/xuri/excelize/v2 Go | From 2.3.1 | 2.11.1-0.20260915055537-22f76f9acb94 |
github.com/360EntSecGroup-Skylar/excelize/v2 Go | From 2.3.1 | None |
Products include Excelize Excelize.
How do I fix CVE-2026-107214?
Upgrade github.com/xuri/excelize/v2 to 2.11.1-0.20260915055537-22f76f9acb94 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-2026-107214 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-107214 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-2026-107215 Excelize: extractPart allocates attacker-controlled, unbounded and negative-sized buffers from CFB directory entries: remote panic / OOM DoS
Sources
Also known as GHSA-2j4c-ffch-9f23, GO-2026-6684.