How severe is CVE-2026-21931?

CVE-2026-21931 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-21931 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-21931?

CVE-2026-21931 primarily affects Oracle Apex. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-21931?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-21931 have an EU (EUVD) identifier?

Yes. CVE-2026-21931 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3578.

When was CVE-2026-21931 published?

CVE-2026-21931 was published on 2026-01-20 and last updated on 2026-06-17.

CVE-2026-21931

CVE-2026-21931 is a medium-severity vulnerability in Oracle Apex with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
EPSS exploit prediction: 0% (8th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-3578
Affected product: Oracle Apex
Published: 2026-01-20
Last modified: 2026-06-17

Description

Vulnerability in the Oracle APEX Sample Applications product of Oracle APEX (component: Brookstrut Sample App). Supported versions that are affected are 23.2.0, 23.2.1, 24.1.0, 24.2.0 and 24.2.1. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle APEX Sample Applications. Successful attacks require human interaction from a person other than the attacker and while the vulnerability is in Oracle APEX Sample Applications, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle APEX Sample Applications accessible data as well as unauthorized read access to a subset of Oracle APEX Sample Applications accessible data. CVSS 3.1 Base Score 5.4 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N).

Frequently asked questions

What is CVE-2026-21931?: Vulnerability in the Oracle APEX Sample Applications product of Oracle APEX (component: Brookstrut Sample App). Supported versions that are affected are 23.2.0, 23.2.1, 24.1.0, 24.2.0 and 24.2.1. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle APEX Sample Applications. Successful attacks require human interaction from a person other than the attacker and while the vulnerability is in Oracle APEX Sample Applications, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle APEX Sample Applications accessible data as well as unauthorized read access to a subset of Oracle APEX Sample Applications accessible data. CVSS 3.1 Base Score 5.4 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N).
How severe is CVE-2026-21931?: CVE-2026-21931 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-21931 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-21931?: CVE-2026-21931 primarily affects Oracle Apex. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-21931?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-21931 have an EU (EUVD) identifier?: Yes. CVE-2026-21931 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3578.
When was CVE-2026-21931 published?: CVE-2026-21931 was published on 2026-01-20 and last updated on 2026-06-17.

References

https://www.oracle.com/security-alerts/cpujan2026.html

Affected products (4)

cpe:2.3:a:oracle:apex:23.2.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:apex:23.2.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:apex:24.1.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:apex:24.2.1:*:*:*:*:*:*:*

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