CVE-2026-59161: Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets

Q: How do I fix CVE-2026-59161?

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

Q: Is CVE-2026-59161 being exploited?

CVE-2026-59161 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-2026-59161 affect?

CVE-2026-59161 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 streaming worksheet reader used by Rows and GetRows does not enforce the TotalRows limit on the row r attribute, allowing a small X

Q: How urgent is CVE-2026-59161?

Priority 54/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action; On your watchlist

This week

HIGH 7.5REMOTEWATCHLISTUPGRADE

CVE-2026-59161 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 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.

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	0.7% (top 49%)
CISA exploited list	No
Weakness	CWE-400, 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 17:17 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

Go · github.com/xuri/excelize · NO FIX YET · vulnerable: <= 1.4.0 · source

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

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: github.com/qax-os/excelize/security/advisories/GHSA-q5j5-6p94-4gwc

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-2026-59161?

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

Is CVE-2026-59161 being exploited?

CVE-2026-59161 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-2026-59161 affect?

CVE-2026-59161 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 streaming worksheet reader used by Rows and GetRows does not enforce the TotalRows limit on the row r attribute, allowing a small X

How urgent is CVE-2026-59161?

Priority 54/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action; On your watchlist

Related CVEs

CVE-2026-59162 HIGH 7.5 UPGRADE Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets
CVE-2026-54063 HIGH 7.5 UPGRADE Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets

References

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