How severe is CVE-2026-22243?

CVE-2026-22243 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-22243 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-22243?

CVE-2026-22243 affects Egroupware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-22243?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-22243 have an EU (EUVD) identifier?

Yes. CVE-2026-22243 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4883.

When was CVE-2026-22243 published?

CVE-2026-22243 was published on 2026-01-28 and last updated on 2026-06-17.

CVE-2026-22243

CVE-2026-22243 is a high-severity vulnerability in Egroupware with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-89.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v4: 8.7
EPSS exploit prediction: 0% (28th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-4883
Weakness: CWE-89
Affected product: Egroupware
Published: 2026-01-28
Last modified: 2026-06-17

Description

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 strings into integers, bypassing the `is_int()` security check used by the application. Versions 23.1.20260113 and 26.0.20260113 patch the vulnerability.

Frequently asked questions

What is CVE-2026-22243?: 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 strings into integers, bypassing the `is_int()` security check used by the application. Versions 23.1.20260113 and 26.0.20260113 patch the vulnerability.
How severe is CVE-2026-22243?: CVE-2026-22243 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-22243 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-22243?: CVE-2026-22243 affects Egroupware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-22243?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-22243 have an EU (EUVD) identifier?: Yes. CVE-2026-22243 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4883.
When was CVE-2026-22243 published?: CVE-2026-22243 was published on 2026-01-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:egroupware:egroupware:*:*:*:*:community:*:*:*

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