CVE-2026-54063: Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets

Q: How do I fix CVE-2026-54063?

excelize: upgrade to 2.11.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-54063 being exploited?

CVE-2026-54063 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-54063 affect?

CVE-2026-54063 affects excelize. Severity is high (CVSS 7.5). Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. Prior to 2.11.0, the checkSheet() function in github.com/xuri/excelize/v2 uses an attacker-controlled XML attribute value directly as the le

This week

HIGH 7.5REMOTEWATCHLISTUPGRADE

CVE-2026-54063 is a high-severity flaw (CVSS 7.5) affecting excelize. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. Prior to 2.11.0, the checkSheet() function in github.com/xuri/excelize/v2 uses an attacker-controlled <row r="N"> XML attribute value directly as the length argument to make([]xlsxRow, row) without validating it against the Excel row limit (TotalRows = 1,048,576). A specially crafted XLSX file can trigger two denial-of-service variants: (A) an out-of-memory pr

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 51%)
CISA exploited list	No
Weakness	CWE-770
Published	2026-07-10
Last modified	2026-10-25

Publisher (CNA): GitHub, Inc. · Vendor: excelize

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-10 17:16 UTCPublished CVE record published
2026-10-25 15:10 UTCUpdated Record last modified

excelize excelize UPGRADE

Affected: < 2.11.0

Fixed in: 2.11.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy excelize || rpm -q excelize || excelize --version

2. UPGRADE to 2.11.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade excelize

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade excelize

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Exact fixes by distribution

Go · github.com/xuri/excelize/v2 · FIXED · 2.11.0 · vulnerable: < 2.11.0 · source

go get github.com/xuri/excelize/v2@v2.11.0 go list -m github.com/xuri/excelize/v2

Fedora ELN · nginx-mod-headers-more · FIXED · 0.41-1.eln159 · FEDORA-2026-31f55f396a · source

sudo dnf upgrade --advisory=FEDORA-2026-31f55f396a

Fedora 46 · erlang-hex_core · FIXED · 0.21.1-1.fc46 · FEDORA-2026-f3389199ff · source

sudo dnf upgrade --advisory=FEDORA-2026-f3389199ff

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-54063?

excelize: upgrade to 2.11.0. Exact commands for each OS are on this page.

Is CVE-2026-54063 being exploited?

CVE-2026-54063 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-54063 affect?

CVE-2026-54063 affects excelize. Severity is high (CVSS 7.5). Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. Prior to 2.11.0, the checkSheet() function in github.com/xuri/excelize/v2 uses an attacker-controlled <row r="N"> XML attribute value directly as the le

How urgent is CVE-2026-54063?

Priority 53/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action; On your watchlist

Software pages

GitHub vulnerabilities

Related CVEs

CVE-2026-59161 HIGH 7.5 UPGRADE Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets
CVE-2026-59162 HIGH 7.5 UPGRADE Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets

References

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