CVE-2026-91399

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-20 · updated 2026-10-23
Weakness: CWE-284

Description

Vulnerability in the Primavera P6 Enterprise Project Portfolio Management product of Oracle Construction and Engineering (component: Web Access). Supported versions that are affected are 21.12.0.0-21.12.21.9, 22.12.0.0-22.12.21.4, 23.12.0-23.12.20, 24.12.0-24.12.16 and 25.12.0-25.12.8. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Primavera P6 Enterprise Project Portfolio Management. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Primavera P6 Enterprise Project Portfolio Management accessible data. CVSS 3.1 Base Score 4.3 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N).

Affected products

Oracle Corporation Primavera P6 Enterprise Project Portfolio Management: from 21.12.0.0 through 21.12.21.9; from 22.12.0.0 through 22.12.21.4; from 23.12.0 through 23.12.20; from 24.12.0 through 24.12.16; from 25.12.0 through 25.12.8

References

https://www.oracle.com/security-alerts/cpuoct2026.html

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