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Oracle Critical Security Patch Update September 2026

Released September 2026 · Oracle's advisory ↗ · ← Security Patch Update, August 2026 · Critical Patch Update, October 2026 →

806 CVEs in this release, one square each

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Share this chart Oracle Critical Security Patch Update September 2026, one square per CVE: 639 Java CVEs, 6 protected by Waratek, 5 exploited, 167 other CVEs in this release.

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6Protected by Waratek633No exploit published1Outside Waratek scope166Not applicable 5Exploited, marked by the ring

No exploit published. For 596 of them, Oracle's security advisory is the source of public detail.

Protected by Waratek. Waratek RASP can block exploitation of these on systems that have not applied the patch yet.

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Overview 6 matches · 0 exploited · 0 CISA KEV · 2 public PoC · 0 EPSS ≥ 0.5
6matches 0exploited0.0% 0CISA KEV0.0% 2public PoC33.3% 0EPSS ≥ 0.50.0%
Protected by Waratek 6 100.0% Rule in development 0 0.0% Mitigation candidate 0 0.0% No exploit published 0 0.0%
Critical 4 66.7% High 0 0.0% Medium 2 33.3% Low 0 0.0% None 0 0.0% Unknown 0 0.0%
blocked by ARMR today 6 100.0% partly blocked 0 0.0% not blocked 0 0.0% not established 0 0.0% unrecorded 0 0.0%
Exploited 0 0.0% Working exploit published 1 16.7% Proof of concept only 1 16.7% Forecast only 0 0.0% No public exploit 4 66.7%
split by peak 2 / month
Protected by Waratek: 6 Medium: 2Critical: 4 blocked by ARMR today: 6 No public exploit: 4Proof of concept only: 1Working exploit published: 1
Apr 262 Protected by Waratek2 Critical2 blocked by ARMR today2 No public exploit2 May 261 Protected by Waratek1 Critical1 blocked by ARMR today1 Proof of concept only1 Jun 262 Protected by Waratek2 Critical1 Medium1 blocked by ARMR today2 Working exploit published1 No public exploit1 Jul 260 Aug 261 Protected by Waratek1 Medium1 blocked by ARMR today1 No public exploit1
Apr 26May 26Jun 26Jul 26Aug 26
6 matches Sign in to download these CVEs as CSV or JSON, or to follow them in a feed.
CVE Severity Published▾ Status Exploitation Description
CVE-2026-19880 Medium 2026-08-14 Protected by Waratek No public exploit Path-traversal vulnerability in QOS.CH Sarl Logback-classic on Java (logback-classic module) allows path-traversal vulnerability. More specifically, an MDC-based discriminator value flows unsanitized into a nested FileAppender path, letting an attacker who influences that MDC value (e.g. via an HTTP header) create and append log files outside the intended directory. This issue affects Logback-classic: from 0.9.14 through 1.6.2.
CVE-2026-50229 Medium 2026-06-29 Protected by Waratek Working exploit published Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability in the number guess example for Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M1 through 10.1.55, from 9.0.0.M1 through 9.0.118, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other versions that have reached end of support may also be affected. Users are recommended to upgrade to version 11.0.23, 10.1.56 or 9.0.119, which fix the issue.
CVE-2026-47065 Critical 2026-06-03 Protected by Waratek No public exploit ZDRES-232: resolveProxyClass Not Overridden - acceptMatchers Filter Bypass via java.lang.reflect.Proxy Assessment: Fully addressed. When the serialised stream contains a TC_PROXYCLASSDESC (the marker for a java.lang.reflect.Proxy ), JDK’s ObjectInputStream.readProxyDesc() is dispatched. JDK then calls the default ObjectInputStream.resolveProxyClass(interfaces) implementation, which performs Class.forName(intf, false, latestUserDefinedLoader()) for EACH interface name and constructs the proxy class — bypassing the accepted classes list . ZDRES-233: Class.forName(name, initialize=true, classLoader) in readClassDescriptor Triggers Static Initialiser of Allow-Listed Classes Assessment: Fully addressed. For ANY class on the allow-list, deserialising a stream that names it triggers the class’s (static initialiser) BEFORE any instance is constructed. This means an attacker who supplies a class name on the allow-list (e.g., the developer wrote accept(“com.myapp.*") , attacker supplies com.myapp.SomeClass ) causes <clinit> of SomeClass — and many real-world classes have side-effecting static initialisers Both issues have been fixed.
CVE-2026-42779 Critical 2026-05-01 Protected by Waratek Proof of concept only The fix for CVE-2026-41635 was not applied to the 2.1.X and 2.2.X branches. Here was the original issue description: Apache MINA's AbstractIoBuffer.resolveClass() contains two branches, one of them (for static classes or primitive types) does not check the class at all, bypassing the classname allowlist and allowing arbitrary code to be executed. The fix checks if the class is present in the accepted class filter before calling Class.forName(). Affected versions are Apache MINA 2.1.0 <= 2.1.11, and 2.2.0 <= 2.2.6. The problem is resolved in Apache MINA 2.1.12, and 2.2.7 by applying the classname allowlist earlier. Affected are applications using Apache MINA that call IoBuffer.getObject(). Applications using Apache MINA are advised to upgrade.
CVE-2026-41635 Critical 2026-04-27 Protected by Waratek No public exploit Apache MINA's AbstractIoBuffer.resolveClass() contains two branches, one of them (for static classes or primitive types) does not check the class at all, bypassing the classname allowlist and allowing arbitrary code to be executed. The fix checks if the class is present in the accepted class filter before calling Class.forName().  Affected versions are Apache MINA 2.0.0 <= 2.0.27, 2.1.0 <= 2.1.10, and 2.2.0 <= 2.2.5. The problem is resolved in Apache MINA 2.0.28, 2.1.11, and 2.2.6 by applying the classname allowlist earlier. Affected are applications using Apache MINA that call  IoBuffer.getObject(). Applications using Apache MINA are advised to upgrade.
CVE-2026-41409 Critical 2026-04-27 Protected by Waratek No public exploit The fix for CVE-2024-52046 in Apache MINA AbstractIoBuffer.getObject() was incomplete. The classname allowlist of classes allowed to be deserialized was applied too late after a static initializer in a class to be read might already have been executed. Affected versions are Apache MINA 2.0.0 <= 2.0.27, 2.1.0 <= 2.1.10, and 2.2.0 <= 2.2.5. The problem is resolved in Apache MINA 2.0.28, 2.1.11, and 2.2.6 by applying the classname allowlist earlier. Affected are applications using Apache MINA that call IoBuffer.getObject(). Applications using Apache MINA are advised to upgrade