Oracle April 2026 Critical Patch Update released
Oracle's quarterly patch release fixes numerous vulnerabilities across its product portfolio, some allowing remote code execution, with no known exploitation in the wild.
Sourcecisecurity.org — open the original
What to check
- Applies to
- Whether this concerns you is not assessed; the names the report mentions are listed below.
Oracle issued its quarterly Critical Patch Update on April 21, 2026, addressing a large number of vulnerabilities spanning nearly its entire product line, including Oracle Database Server, E-Business Suite, WebLogic Server, Java SE, MySQL, PeopleSoft, Siebel, and numerous financial services, communications, retail, and utilities applications. The most severe of these flaws could allow an attacker to achieve remote code execution in the context of the logged-on user, with impact scope depending on the privileges of that account.
MS-ISAC notes that there are currently no reports of these vulnerabilities being exploited in the wild, indicating this is a routine but broad patch cycle rather than an active threat. Given the breadth of affected products—spanning government, financial services, telecommunications, healthcare-adjacent life sciences, retail, and energy/utilities sectors—organizations running Oracle software are advised to prioritize patching based on exposure and criticality, following standard vulnerability management practices such as automated patch management, least-privilege configurations, and exploit protection controls.
As with all Oracle Critical Patch Updates, the sheer volume of affected products and versions means impact assessment should be tailored to each organization's specific deployment footprint. No named threat actors, malware, or active campaigns are associated with this disclosure at this time.
Source reporting: https://www.cisecurity.org/advisory/oracle-quarterly-critical-patches-issued-april-21-2026_2026-041
Free public brief. The indicators are in the app with a free account, no card. Slack alerts on the vendors you run come with the paid plans, and a new account gets three days of them.
What this brief leaves out
This page is the free tier: the write-up, the severity, the names. In the app the same report carries its extracted indicators. The paid plans add the security research and news reporting the free tier leaves out.
It sits in a corpus of 16,436 reports from 149 sources, 661 of them written in the last seven days, and it grows through the day.
A new account starts with three days of all of it, no card, then keeps the government and CERT reporting free. Slack alerts are a paid-plan feature: name the vendors you run and Slack hears about the reports that touch them, not the rest of the week's. Nothing is charged unless you subscribe.
Create a free account What it costs