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Oracle Critical Patch Update October 2026

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

1,693 CVEs in this release, one square each

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Share this chart Oracle Critical Patch Update October 2026, one square per CVE: 1,131 Java CVEs, 21 protected by Waratek, 5 exploited, 562 other CVEs in this release.

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21Protected by Waratek1Mitigation candidate1,109No exploit published13Outside Waratek scope549Not applicable 5Exploited, marked by the ring

No exploit published. For 858 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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Including CVEs outside Waratek scope✕Has a public PoC✕
Overview 14 matches · 7 in Waratek scope · 6 protected · 4 exploited · 3 CISA KEV · 7 EPSS ≥ 0.5
14matches 7in Waratek scope50.0% 6protected42.9% 4exploited28.6% 3CISA KEV21.4% 7EPSS ≥ 0.550.0%
Protected by Waratek 6 42.9% Rule in development 0 0.0% Mitigation candidate 1 7.1% No exploit published 0 0.0% Outside Waratek scope 1 7.1% Not applicable 6 42.9% Withdrawn CVE 0 0.0%
Critical 5 35.7% High 6 42.9% Medium 3 21.4% Low 0 0.0% None 0 0.0% Unknown 0 0.0%
blocked by ARMR today 6 42.9% partly blocked 0 0.0% not blocked 8 57.1% not established 0 0.0% unrecorded 0 0.0%
Exploited 4 28.6% Working exploit published 2 14.3% Proof of concept only 8 57.1% Forecast only 0 0.0% No public exploit 0 0.0%
split by peak 7 / quarter
Not applicable: 6Outside Waratek scope: 1Mitigation candidate: 1Protected by Waratek: 6 Medium: 3High: 6Critical: 5 not blocked: 8blocked by ARMR today: 6 Proof of concept only: 8Working exploit published: 2Exploited: 4
Q3 221 Protected by Waratek1 High1 blocked by ARMR today1 Proof of concept only1 Q4 221 Protected by Waratek1 Critical1 blocked by ARMR today1 Exploited1 Q1 230 Q2 230 Q3 230 Q4 231 Mitigation candidate1 High1 not blocked1 Exploited1 Q1 240 Q2 241 Outside Waratek scope1 High1 not blocked1 Working exploit published1 Q3 240 Q4 240 Q1 251 Protected by Waratek1 Critical1 blocked by ARMR today1 Exploited1 Q2 250 Q3 250 Q4 250 Q1 262 Not applicable2 Critical1 Medium1 not blocked2 Proof of concept only2 Q2 267 Protected by Waratek3 Not applicable4 Critical2 High3 Medium2 blocked by ARMR today3 not blocked4 Exploited1 Working exploit published1 Proof of concept only5
Q4 22Q2 23Q4 23Q2 24Q4 24Q2 25Q4 25Q2 26
14 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-2026-50229 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-2026-55200 Critical 2026-06-17 Not applicable Proof of concept only libssh2 1.11.1, fixed in commit 97acf3d, contains an out-of-bounds write vulnerability in ssh2_transport_read() that fails to enforce upper bounds on packet_length field. Remote attackers can send crafted SSH packets with excessively large packet_length values to corrupt heap memory and achieve remote code execution.
CVE-2026-49975 High 2026-06-08 Not applicable Proof of concept only Memory Allocation with Excessive Size Value vulnerability in Apache HTTP Server's mod_http leads to denial of service via malicious HTTP requests. This issue affects Apache HTTP Server: from 2.4.17 through 2.4.67.
CVE-2026-42536 High 2026-06-08 Not applicable Proof of concept only Heap-based Buffer Overflow vulnerability in Apache HTTP Server with mod_xml2enc, xml2StartParse, and untrusted content This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67. Users are recommended to upgrade to version 2.4.68, which fixes the issue.
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-2026-34486 High 2026-04-09 Protected by Waratek Exploited Missing Encryption of Sensitive Data vulnerability in Apache Tomcat due to the fix for CVE-2026-29146 allowing the bypass of the EncryptInterceptor. This issue affects Apache Tomcat: 11.0.20, 10.1.53, 9.0.116. Users are recommended to upgrade to version 11.0.21, 10.1.54 or 9.0.117, which fix the issue.
CVE-2026-34835 Medium 2026-04-02 Not applicable Proof of concept only Rack is a modular Ruby web server interface. From versions 3.0.0.beta1 to before 3.1.21, and 3.2.0 to before 3.2.6, Rack::Request parses the Host header using an AUTHORITY regular expression that accepts characters not permitted in RFC-compliant hostnames, including /, ?, #, and @. Because req.host returns the full parsed value, applications that validate hosts using naive prefix or suffix checks can be bypassed. This can lead to host header poisoning in applications that use req.host, req.url, or req.base_url for link generation, redirects, or origin validation. This issue has been patched in versions 3.1.21 and 3.2.6.
CVE-2026-20643 Medium 2026-03-17 Not applicable Proof of concept only A cross-origin issue in the Navigation API was addressed with improved input validation. This issue is fixed in Background Security Improvements for iOS, iPadOS, and macOS, Safari 26.4, iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, visionOS 26.4. Processing maliciously crafted web content may bypass Same Origin Policy.
CVE-2025-15467 Critical 2026-01-27 Not applicable Proof of concept only Issue summary: Parsing CMS AuthEnvelopedData or EnvelopedData message with maliciously crafted AEAD parameters can trigger a stack buffer overflow. Impact summary: A stack buffer overflow may lead to a crash, causing Denial of Service, or potentially remote code execution. When parsing CMS (Auth)EnvelopedData structures that use AEAD ciphers such as AES-GCM, the IV (Initialization Vector) encoded in the ASN.1 parameters is copied into a fixed-size stack buffer without verifying that its length fits the destination. An attacker can supply a crafted CMS message with an oversized IV, causing a stack-based out-of-bounds write before any authentication or tag verification occurs. Applications and services that parse untrusted CMS or PKCS#7 content using AEAD ciphers (e.g., S/MIME (Auth)EnvelopedData with AES-GCM) are vulnerable. Because the overflow occurs prior to authentication, no valid key material is required to trigger it. While exploitability to remote code execution depends on platform and toolchain mitigations, the stack-based write primitive represents a severe risk. The FIPS modules in 3.6, 3.5, 3.4, 3.3 and 3.0 are not affected by this issue, as the CMS implementation is outside the OpenSSL FIPS module boundary. OpenSSL 3.6, 3.5, 3.4, 3.3 and 3.0 are vulnerable to this issue. OpenSSL 1.1.1 and 1.0.2 are not affected by this issue.
CVE-2025-24813 Critical 2025-03-10 Protected by Waratek Exploited Path Equivalence: 'file.Name' (Internal Dot) leading to Remote Code Execution and/or Information disclosure and/or malicious content added to uploaded files via write enabled Default Servlet in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.2, from 10.1.0-M1 through 10.1.34, from 9.0.0.M1 through 9.0.98. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.0 though 8.5.100. Other, older, EOL versions may also be affected. If all of the following were true, a malicious user was able to view security sensitive files and/or inject content into those files: - writes enabled for the default servlet (disabled by default) - support for partial PUT (enabled by default) - a target URL for security sensitive uploads that was a sub-directory of a target URL for public uploads - attacker knowledge of the names of security sensitive files being uploaded - the security sensitive files also being uploaded via partial PUT If all of the following were true, a malicious user was able to perform remote code execution: - writes enabled for the default servlet (disabled by default) - support for partial PUT (enabled by default) - application was using Tomcat's file based session persistence with the default storage location - application included a library that may be leveraged in a deserialization attack Users are recommended to upgrade to version 11.0.3, 10.1.35 or 9.0.99, which fixes the issue.
CVE-2024-4367 High 2024-05-14 Outside Waratek scope Working exploit published A type check was missing when handling fonts in PDF.js, which would allow arbitrary JavaScript execution in the PDF.js context. This vulnerability affects Firefox < 126, Firefox ESR < 115.11, and Thunderbird < 115.11.
CVE-2023-44487 High 2023-10-10 Mitigation candidate Exploited The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023.
CVE-2022-1471 Critical 2022-12-01 Protected by Waratek Exploited SnakeYaml's Constructor() class does not restrict types which can be instantiated during deserialization. Deserializing yaml content provided by an attacker can lead to remote code execution. We recommend using SnakeYaml's SafeConsturctor when parsing untrusted content to restrict deserialization. We recommend upgrading to version 2.0 and beyond.
CVE-2022-34169 High 2022-07-19 Protected by Waratek Proof of concept only The Apache Xalan Java XSLT library is vulnerable to an integer truncation issue when processing malicious XSLT stylesheets. This can be used to corrupt Java class files generated by the internal XSLTC compiler and execute arbitrary Java bytecode. Users are recommended to update to version 2.7.3 or later. Note: Java runtimes (such as OpenJDK) include repackaged copies of Xalan.