CVE-2026-22243: EGroupware is a Web based groupware server written in PHP

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HIGH 8.8UPGRADE

CVE-2026-22243 is a high-severity flaw (CVSS 8.8) affecting egroupware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

EGroupware is a Web based groupware server written in PHP. A SQL Injection vulnerability exists in the core components of EGroupware prior to versions 23.1.20260113 and 26.0.20260113, specifically in the `Nextmatch` filter processing. The flaw allows authenticated attackers to inject arbitrary SQL commands into the `WHERE` clause of database queries. This is achieved by exploiting a PHP type juggling issue where JSON decoding converts numeric str

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 63%)
CISA exploited list	No
Weakness	CWE-89
Published	2026-01-28
Last modified	2026-06-17

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

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

Am I affected?

Timeline

2026-01-28 17:16 UTCPublished CVE record published
2026-06-17 10:19 UTCUpdated Record last modified

egroupware egroupware UPGRADE

Affected: < 23.1.20260113 · >= 26.0.20251208 and < 26.0.20260113

Fixed in: 23.1.20260113, 26.0.20260113

Safe to downgrade to: a release before 26.0.20251208

1. Check installed version

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

2. UPGRADE to 23.1.20260113 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade egroupware

Note

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

3. If no update is available yet, DOWNGRADE to a release before 26.0.20251208 (Debian / Ubuntu)

apt-cache madison egroupware sudo apt install egroupware=<VERSION_BEFORE_26.0.20251208> sudo apt-mark hold egroupware

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list egroupware sudo dnf downgrade egroupware-<VERSION_BEFORE_26.0.20251208> sudo dnf versionlock add egroupware

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2026-22243?

egroupware: upgrade to 23.1.20260113, 26.0.20260113. Exact commands for each OS are on this page.

Is CVE-2026-22243 being exploited?

CVE-2026-22243 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-2026-22243 affect?

CVE-2026-22243 affects egroupware. Severity is high (CVSS 8.8). EGroupware is a Web based groupware server written in PHP. A SQL Injection vulnerability exists in the core components of EGroupware prior to versions 23.1.20260113 and 26.0.20260113, specifically in the `Nextmatch` filter processing. The f

How urgent is CVE-2026-22243?

Priority 45/100. High severity; Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2024-40614 CRITICAL 9.8 UPGRADE EGroupware before 23.1.20240624 mishandles an ORDER BY clause
CVE-2023-38329 MEDIUM 6.1 DOWNGRADE An issue was discovered in eGroupWare 17.1.20190111
CVE-2023-38328 MEDIUM 4.9 DOWNGRADE An issue was discovered in eGroupWare 17.1.20190111
CVE-2023-38327 MEDIUM 5.3 DOWNGRADE An issue was discovered in eGroupWare 17.1.20190111

References

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