CVE-2022-23640: Excel-Streaming-Reader is an easy-to-use implementation of a streaming Excel reader using Apache POI

Q: How do I fix CVE-2022-23640?

excel streaming reader: upgrade to 2.1.0. Exact commands for each OS are on this page.

Q: Is CVE-2022-23640 being exploited?

CVE-2022-23640 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-2022-23640 affect?

CVE-2022-23640 affects excel streaming reader. Severity is critical (CVSS 9.8). Excel-Streaming-Reader is an easy-to-use implementation of a streaming Excel reader using Apache POI. Prior to xlsx-streamer 2.1.0, the XML parser that was used did apply all the necessary settings to prevent XML Entity Expansion issues. Up

Q: How urgent is CVE-2022-23640?

Priority 62/100. Critical severity; Remotely exploitable, no login, no user action; On your watchlist

This week

CRITICAL 9.8REMOTEWATCHLISTUPGRADE

CVE-2022-23640 is a critical-severity flaw (CVSS 9.8) affecting excel streaming reader. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Excel-Streaming-Reader is an easy-to-use implementation of a streaming Excel reader using Apache POI. Prior to xlsx-streamer 2.1.0, the XML parser that was used did apply all the necessary settings to prevent XML Entity Expansion issues. Upgrade to version 2.1.0 to receive a patch. There is no known workaround.

Why this priority

Critical severity
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.3% (top 30%)
CISA exploited list	No
Weakness	CWE-611, CWE-776
Published	2022-03-02
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: excel streaming reader project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-03-02 20:15 UTCPublished CVE record published
2026-06-17 04:30 UTCUpdated Record last modified

excel streaming reader project excel streaming reader UPGRADE

Affected: < 2.1.0

Fixed in: 2.1.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy excel-streaming-reader || rpm -q excel-streaming-reader || excel-streaming-reader --version

2. UPGRADE to 2.1.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade excel-streaming-reader

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade excel-streaming-reader

Note

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

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-2022-23640?

excel streaming reader: upgrade to 2.1.0. Exact commands for each OS are on this page.

Is CVE-2022-23640 being exploited?

CVE-2022-23640 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-2022-23640 affect?

CVE-2022-23640 affects excel streaming reader. Severity is critical (CVSS 9.8). Excel-Streaming-Reader is an easy-to-use implementation of a streaming Excel reader using Apache POI. Prior to xlsx-streamer 2.1.0, the XML parser that was used did apply all the necessary settings to prevent XML Entity Expansion issues. Up

How urgent is CVE-2022-23640?

Priority 62/100. Critical severity; Remotely exploitable, no login, no user action; On your watchlist

References

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