Is CVE-2026-107218 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-107218 being exploited in the wild.

How severe is CVE-2026-107218?

Medium severity, with a CVSS score of 5.3, published 7 October 2026.

Which products and versions are affected?

Excelize v2.10.1, v2.11.0; github.com/xuri/excelize/v2 (Go) >= 2.10.1, < 2.11.1-0.20260908032718-ecd99d761fe0, SEMVER:introduced=2.10.1,fixed=2.11.1-0.20260908032718-ecd99d761fe0.

Is there a fix for CVE-2026-107218?

Yes. github.com/xuri/excelize/v2 (Go): upgrade to 2.11.1-0.20260908032718-ecd99d761fe0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-107218 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-107218?

Check whether you run Excelize or github.com/xuri/excelize/v2 (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-107218: Excelize RIGHT() function panic on supplementary-plane text with negative index

Q: Is there a fix for CVE-2026-107218?

Yes. github.com/xuri/excelize/v2 (Go): upgrade to 2.11.1-0.20260908032718-ecd99d761fe0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-107218 attacked?

It is attacked over the network, in a software library.

Q: Am I affected by CVE-2026-107218?

Check whether you run Excelize or github.com/xuri/excelize/v2 (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-107218 · Severity: medium · CVSS 5.3 · Published 2026-10-07

Excelize is a Go library for reading and writing Excel files. A logic error in the RIGHT() formula function can cause the application to crash when processing specially crafted spreadsheets containing certain Unicode characters. This denial-of-service issue can be triggered automatically when a malicious file is normalized using AutoFitColWidth, or manually through explicit formula evaluation.

Technologies: Excelize, github.com/xuri/excelize/v2 (Go). Vendors: Excelize, Go.

Quick answers

Is CVE-2026-107218 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-107218 being exploited in the wild.
How severe is CVE-2026-107218?: Medium severity, with a CVSS score of 5.3, published 7 October 2026.
Which products and versions are affected?: Excelize v2.10.1, v2.11.0; github.com/xuri/excelize/v2 (Go) >= 2.10.1, < 2.11.1-0.20260908032718-ecd99d761fe0, SEMVER:introduced=2.10.1,fixed=2.11.1-0.20260908032718-ecd99d761fe0.
Is there a fix for CVE-2026-107218?: Yes. github.com/xuri/excelize/v2 (Go): upgrade to 2.11.1-0.20260908032718-ecd99d761fe0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-107218 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-107218?: Check whether you run Excelize or github.com/xuri/excelize/v2 (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

github.com/xuri/excelize/v2 (Go): upgrade to 2.11.1-0.20260908032718-ecd99d761fe0 or later
```
go get github.com/xuri/excelize/v2@v2.11.1-0.20260908032718-ecd99d761fe0
```

Technical details

A unit mismatch in the RIGHT() function allows a negative array index to bypass bounds checking: the guard uses UTF-16 code unit counting (where supplementary-plane characters count as 2), but the slice operation uses UTF-8 rune counting (where they count as 1). For text with supplementary-plane characters, this causes a panic on slice bounds out of range. The vulnerability is reachable without user interaction via AutoFitColWidth (added in v2.11.0) or through explicit CalcCellValue calls.

Affected products

Excelize Excelize v2.10.1, v2.11.0

Identifiers

CVE-2026-107218
GHSA-8jjq-8j9w-m2v6
GO-2026-6675

Timeline

2026-10-07: disclosed

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