CVE-2023-44487

HTTP/2: Multiple HTTP/2 enabled web servers are vulnerable to a DDoS attack (Rapid Reset Attack)

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.

CVSS 3.1 · 7.5 High EPSS 100.0% KEV · Listed

Vendors

Akka Amazon Apache and 30 more

Products

Http Server Opensearch Data Prepper Apisix and 375 more

CVE-2021-44228

Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints

Apache Log4j2 2.0-beta9 through 2.15.0 (excluding security releases 2.12.2, 2.12.3, and 2.3.1) JNDI features used in configuration, log messages, and parameters do not protect against attacker controlled LDAP and other JNDI related endpoints. An attacker who can control log messages or log message parameters can execute arbitrary code loaded from LDAP servers when message lookup substitution is enabled. From log4j 2.15.0, this behavior has been disabled by default. From version 2.16.0 (along with 2.12.2, 2.12.3, and 2.3.1), this functionality has been completely removed. Note that this vulnerability is specific to log4j-core and does not affect log4net, log4cxx, or other Apache Logging Services projects.

CVSS 3.1 · 10 Critical EPSS 100.0% KEV · Listed

Vendors

Apache Apple Bentley and 10 more

Products

Log4j Xcode Synchro and 174 more

CVE-2026-64608

Apache Fory: Heap type confusion and out-of-bounds read/write in C++ compatible-mode field-skip paths

Heap type confusion and out-of-bounds read/write in the Apache Fory C++ implementation. When deserializing data in compatible mode, the field-skip paths do not correctly validate the declared field types against the actual data, so input with an inconsistent schema can cause type confusion and out-of-bounds memory access. Only the C++ implementation is affected; other language implementations of Apache Fory are not. This issue affects Apache Fory C++: from 0.14.0 before 1.4.0. Users are recommended to upgrade to version 1.4.0, which fixes the issue.

CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed

Vendors

Apache

Products

Fory

CVE-2026-67592

Apache Qpid ProtonJ2: Unable to govern the maximum number of transfer frames per incoming delivery

It was not possible to govern the maximum number of transfer frames per incoming delivery, enabling an authenticated attacker to cause excessive resource usage and potential denial of service. This issue affects Apache Qpid ProtonJ2: through 1.1.0. Users are recommended to upgrade to version 1.2.0, which fixes the issue

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed

Vendors

Apache

Products

Qpid Proton-j Qpid Protonj2

CVE-2026-34502

Apache Portable Runtime Utility: Heap buffer overflow in APR memcached client

Heap-based Buffer Overflow vulnerability in Apache Portable Runtime Utility memcached client This issue affects Apache Portable Runtime Utility: from 1.3.0 through 1.6.3.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed

Vendors

Apache

Products

Apr-util Portable Runtime Utility

CVE-2026-34501

Apache Portable Runtime Utility: Heap buffer overflow in APR redis client

Heap-based Buffer Overflow vulnerability in Apache Portable Runtime Utility redis client. This issue affects Apache Portable Runtime Utility: from 1.6.0 through 1.6.3. Users are recommended to upgrade to version 1.6.4, which fixes the issue.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed

Vendors

Apache

Products

Apr-util Portable Runtime Utility

CVE-2026-34191

Apache Portable Runtime Utility: SQL Injection in apr_dbd_oracle

Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in Apache Portable Runtime Utility via apr_dbd_oracle provider. This issue affects Apache Portable Runtime Utility: from 1.6.0 through 1.6.3

CVSS 3.1 · 9.1 Critical EPSS < 1% KEV · Not listed

Vendors

Apache

Products

Apr-util Portable Runtime Utility

CVE-2025-49506

Apache Portable Runtime Utility: apr_password_validate() vulnerable to timing attack

APR-util versions 1.6.3 (and earlier) function apr_password_validate() was not constant-time with regards to hashes or passwords comparisons, potentially leaking their content via a side channel timing attack particularly on platforms without crypt() such as  Windows, BeOS, NetWare, or Android. Users are recommended to upgrade to version 1.6.4, which fixes this issue.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed

Vendors

Apache

Products

Apr-util Portable Runtime Utility

CVE-2026-71558

Apache Fory: Heap type confusion in C++ polymorphic smart-pointer deserialization

Heap type confusion vulnerability in Apache Fory C++ deserialization. This issue affects Apache Fory C++ versions from 0.14.0 before 1.5.0. A crafted input payload can bypass type compatibility checks during polymorphic smart-pointer deserialization, causing an object of an incompatible type to be treated as the declared base type. This may result in undefined behavior and potentially lead to denial of service or arbitrary code execution. Users are recommended to upgrade to Apache Fory 1.5.0, which fixes this issue. Applications not using Apache Fory C++ polymorphic smart-pointer deserialization are not affected.

CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed

Vendors

Apache

Products

Fory

CVE-2026-71560

Apache Fory: Out-of-bounds heap read in C++ struct deserializer tagged-int fast-path

Out-of-bounds Read vulnerability in Apache Fory C++ deserialization. This issue affects Apache Fory C++ versions from 0.14.0 before 1.5.0 when deserializing structs containing tagged integer fields. A crafted input payload may trigger an out-of-bounds heap read in the tagged integer fast-path deserializer, potentially causing information disclosure or denial of service. Users are recommended to upgrade to Apache Fory 1.5.0, which fixes this issue. Applications that do not use Apache Fory C++ or do not use tagged integer fields are not affected.

CVSS 3.1 · 9.1 Critical EPSS < 1% KEV · Not listed

Vendors

Apache

Products

Fory

CVE-2026-50645

Apache CXF: No restriction on attachment headers per message

There is no restriction on the amount of attachment headers that a message can contain when being deserialized by Apache CXF, which can lead to uncontrolled resource consumption or a denial of service attack. Users are recommended to upgrade to versions 4.2.2 or 4.1.7 or 3.6.12, which fix this issue by imposing a maximum default of 500 attachments per message.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed

Vendors

Apache

Products

Cxf

CVE-2026-50631

Apache CXF: OAuth2: TOCTOU Race Condition in Refresh Token Processing

A race condition in AbstractOAuthDataProvider allows concurrent requests using the same Refresh Token to bypass single-use semantics and generate multiple valid Access Tokens, when 'recycleRefreshTokens' is set to false. A leaked refresh token can be replayed concurrently by multiple attackers or threads. Users are recommended to upgrade to versions 4.2.2 or 4.1.7 or 3.6.12, which fixes this issue.

CVSS 3.1 · 7.4 High EPSS < 1% KEV · Not listed

Vendors

Apache

Products

Cxf

CVE-2026-60023

Apache Answer: Unauthorized disclosure of deleted or pending answer content

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.1. Deleted or pending answers could be retrieved by unauthorized users through the single-answer read path when the parent question remained visible, exposing answer content that should not have been accessible. Users are recommended to upgrade to version 2.0.2, which fixes the issue.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed

Vendors

Apache

Products

Answer

CVE-2026-54225

Apache CXF: Denial of Service attack via large attachments

Apache CXF allows to control the maximum attachment size via the "attachment-max-size". Prior to Apache CXF 4.2.3 and 4.1.8 and 3.6.12, there was no default placed on this size, meaning that a denial of service attack is possible if the user doesn't explicitly set the limit. Users should update to Apache CXF 4.2.3 or 4.1.8 or 3.6.12 which fixes this problem by imposing a default attachment size limit of 50mb.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed

Vendors

Apache

Products

Cxf

CVE-2026-64958

Apache CXF: Denial of service via message header attachments

An incomplete fix for CVE-2026-50645 means that it is still possible to perform a denial of service attack on Apache CXF by sending a message with many attachment headers. Users are recommended to upgrade to versions 4.2.3 or 4.1.8 or 3.6.12, which fix this issue.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed

Vendors

Apache

Products

Cxf

CVE-2026-66909

Apache CXF: Unsafe deserialization of inbound JMS ObjectMessage

Apache CXF's JMS transport deserializes the body of any inbound JMS ObjectMessage using native Java deserialization, with no type restrictions in place. Any attacker able to place a message on the service's JMS destination can submit a malicious serialized object, leading to denial of service or, if a suitable gadget class is on the classpath, remote code execution. The fix disables ObjectMessage deserialization by default, with a configuration switch to re-enable it if needed. Users are recommended to upgrade to versions 4.2.3 or 4.1.8 or 3.6.12, which fix this issue.

CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed

Vendors

Apache

Products

Cxf

CVE-2026-65432

Apache CXF: XXE via WSDL/XSD import parsing

Apache CXF reads a top-level WSDL through its hardened StaxUtils path, which disables XML DTDs and external entities. However, any <wsdl:import> or <xsd:import> referenced from that top-level WSDL is handed off to WSDL4J, which does not disable DOCTYPE declarations or external entities. As a result, the protections applied to the top-level document do not extend to imported documents, leaving imported WSDL/XSD content vulnerable to XML External Entity (XXE) attacks. Users are recommended to upgrade to versions 4.2.3 or 4.1.8 or 3.6.12, which fix this issue.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed

Vendors

Apache

Products

Cxf

CVE-2026-57817

Apache CXF: The authorization code hash (c_hash) is not enforced for the hybrid OIDC flow

The OpenID Connect Core 1.0 specification mandates that the RP MUST validate the `c_hash` parameter when operating in the Hybrid Flow. If an Apache CXF RP is integrated with a non-compliant or misconfigured Identity Provider (IdP) that omits the `c_hash`, the RP becomes vulnerable to Authorization Code Substitution/Injection attacks. Users are recommended to upgrade to versions 4.2.3 or 4.1.8 or 3.6.12, which fix this issue.

CVSS 3.1 · 8.1 High EPSS < 1% KEV · Not listed

Vendors

Apache

Products

Cxf

CVE-2026-68079

Apache CXF: DefaultEncryptingCodeDataProvider allows unlimited authorization code replay

In Apache CXF's DefaultEncryptingCodeDataProvider, a captured authorization code can be redeemed an unlimited number of times due to a flaw in the implementation of the removeCodeGrant functionality. This violates the RFC requirement that "The authorization code MUST NOT be used more than once." Users are recommended to upgrade to versions 4.2.3 or 4.1.8 or 3.6.12, which fix this issue.

CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed

Vendors

Apache

Products

Cxf

CVE-2026-57818

Apache CXF: OAuth2 Authorization Code Replay via TOCTOU in JCacheCodeDataProvider

A race condition in JCacheCodeDataProvider allows an attacker to redeem a single authorization code multiple times via concurrent requests, resulting in the issuance of multiple distinct, valid access tokens. Users are recommended to upgrade to versions 4.2.3, 4.1.8 or 3.6.12, which fix this issue.

CVSS 3.1 · 8.1 High EPSS < 1% KEV · Not listed

Vendors

Apache

Products

Cxf