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CVE-2026-50634

Apache CXF: WS JSON request filter trusts metadata from an unvalidated first signature entry

A vulnerability in Apache CXF's JwsJsonContainerRequestFilter can be exploited to cause CXF to process metadata that was not authenticated by the accepted signature. This can bypass the application's assumption that accepted `Content-Type` or protected HTTP-header metadata came from a verified signature entry, and may steer downstream JAX-RS entity parsing or signed-header consistency checks. Users are recommended to upgrade to versions 4.2.2 or 4.1.7 or 3.6.12, which fix this issue.

CVSS 3.1 · 6.5 Medium 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-2026-50630

Apache CXF: OAuth2: HTTP Response Splitting via WWW-Authenticate Realm Injection

A CRLF injection vulnerability exists in the OAuth2 AuthorizationUtils class. When constructing the WWW-Authenticate response header, the 'realm' parameter is concatenated without sanitizing Carriage Return (CR) and Line Feed (LF) characters. If an attacker can control the realm value, they can inject arbitrary HTTP headers or split the HTTP response entirely. 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 · 6.5 Medium EPSS < 1% KEV · Not listed
Vendors
Apache
Products
Cxf
CVE-2026-50629

Apache CXF: OAuth2: Log Injection via Unsanitized Client Identifier

The 'clientId' parameter from incoming HTTP requests is directly concatenated into OAuth2 server log warning messages without sanitizing control characters. This allows an attacker to inject arbitrary content, including fake log entries, into the server's log files. 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 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Apache
Products
Cxf
CVE-2026-50623

Apache CXF: Authentication Bypass in OAuth2 TokenIntrospectionService

An authentication bypass vulnerability exists in the OAuth2 TokenIntrospectionService in Apache CXF. Due to a missing 'throw' keyword in the security context check, the introspection endpoint (/services/oauth2/introspect) can be accessed by any unauthenticated network attacker. However note that this is a safeguard only in the case that someone forgot to enable authentication on the service. Users are recommended to upgrade to version 4.2.2 or 4.1.7 or 3.6.12, which fixes this issue.

CVSS 3.1 · 4.8 Medium 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
CVE-2026-68481

Apache CXF: Revocation bypass in DefaultEncryptingOAuthDataProvider

In Apache CXF's DefaultEncryptingOAuthDataProvider, revoked access tokens still decrypt successfully, and TokenIntrospectionService reports active:true. The same applies to refresh tokens. This violates the RFC stipulations that 'The authorization server MUST invalidate the token.' and 'introspection of a revoked token MUST return {"active":false}'. 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-2026-32327

Apache Portable Runtime Utility: apr-util XML stack recursion crash

A bug in APR-util version 1.6.3 (and earlier) allows a stack recursion attack against any library consumer which parses XML from untrusted sources and uses the apr_xml_quote_elem() function. Users are recommended to upgrade to version 1.6.4, which fixes this issue.

CVSS 3.1 · 9.1 Critical EPSS < 1% KEV · Not listed
Vendors
Apache
Products
Apr-util Portable Runtime Utility
CVE-2026-67551

Apache Qpid Proton Dotnet: Type size/count handling can lead to excessive allocation pre-authentication

pre-authentication attacker could leverage type size/count handling to cause excessive allocation leading to potential denial of service. This issue affects Apache Qpid Proton-Dotnet: through 1.0.0. Users are recommended to upgrade to version 1.1.0, which fixes the issue.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Apache
Products
Qpid Proton-dotnet Qpid Proton Dotnet
CVE-2026-50749

Apache Answer: Missing authorization in revision audit reject allows authenticated users to reject pending revisions

Improper Authorization vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.1. Any authenticated user can reject arbitrary pending edit-revisions without review permission due to a missing authorization check on the reject operation. Users are recommended to upgrade to version 2.0.2, which fixes the issue.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Vendors
Apache
Products
Answer
CVE-2026-68075

Apache Qpid Broker-J: Incoming session flow control window can be exceeded

An authenticated attacker could exceed the session flow control incoming window potentially leading to denial of service. This issue affects Apache Qpid Broker-J: through 10.0.1. Users are recommended to upgrade to version 10.1.0, which fixes the issue.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Vendors
Apache
Products
Qpid Broker-j
CVE-2026-61466

Apache CXF: OAuth2 Dynamic Client Registration Scope Self-Escalation

In Apache CXF's OAuth2 Dynamic Client Registration endpoint, the authorization server accepts and stores the `scope` value supplied in the client registration request verbatim, without validating it against an AS-defined allowlist. This could lead to a client self-assigning privileged scopes at registration time. 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 · 9.1 Critical EPSS < 1% KEV · Not listed
Vendors
Apache
Products
Cxf
CVE-2026-63687

Apache CXF: JwtRequestCodeFilter silently overrides outer PKCE and nonce parameters

Apache CXF's JwtRequestCodeFilter copies all claims from a signed request JWT into the authorization parameter map without excluding security-sensitive parameters. A client that can produce a validly-signed request JWT (e.g., one whose client_secret is known or compromised) can thereby substitute the code_challenge, code_challenge_method, nonce, and state values that were set in the outer HTTP request, undermining PKCE integrity and OpenID Connect replay protection. 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 · 9.1 Critical EPSS < 1% KEV · Not listed
Vendors
Apache
Products
Cxf