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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
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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
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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
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CVE-2026-66276

Apache Qpid Proton-J: Unbounded disposition range handling can lead to denial of service

An authenticated attacker can craft a disposition frame with large or illegal ranges causing excessive CPU usage due to naive range handling, leading to denial of service. This issue affects Apache Qpid Proton-J: through 0.34.1. Users are recommended to upgrade to version 0.35.0, which fixes the issue.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
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CVE-2026-68077

Apache Qpid Broker-J: Unbounded disposition range handling can lead to denial of service

An authenticated attacker can craft a disposition frame with large or illegal ranges causing excessive CPU usage due to naive range handling, 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
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CVE-2026-68073

Apache Qpid Broker-J: Unbounded type nesting can lead to pre-authentication stack overflow

A pre-authentication attacker could leverage type nesting to cause a StackOverflowError 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 · 7.5 High EPSS < 1% KEV · Not listed
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CVE-2026-66273

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

A 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-J: through 0.34.1. Users are recommended to upgrade to version 0.35.0, which fixes the issue.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
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CVE-2026-67588

Apache Qpid ProtonJ2: Unbounded symbol value caching can lead to pre-authentication resource exhaustion

A pre-authentication attacker could leverage unbounded symbol value caching to cause resource exhaustion leading to 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
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CVE-2026-67465

Apache Qpid Proton Dotnet: Unbounded symbol value caching can lead to pre-authentication resource exhaustion

A pre-authentication attacker could leverage unbounded symbol value caching to cause resource exhaustion leading to 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
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CVE-2026-68074

Apache Qpid Broker-J: Unbounded symbol value caching can lead to pre-authentication resource exhaustion

A pre-authentication attacker could leverage unbounded symbol value caching to cause resource exhaustion 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 · 7.5 High EPSS < 1% KEV · Not listed
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CVE-2026-66257

Apache Qpid Proton-J: Unbounded symbol value caching can lead to pre-authentication resource exhaustion

A pre-authentication attacker could leverage unbounded symbol value caching to cause resource exhaustion leading to denial of service. This issue affects Apache Qpid Proton-J: through 0.34.1. Users are recommended to upgrade to version 0.35.0, which fixes the issue.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
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CVE-2026-66277

Apache Qpid Proton-J: 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 Proton-J: through 0.34.1. Users are recommended to upgrade to version 0.35.0, which fixes the issue.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
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CVE-2026-68078

Apache Qpid Broker-J: 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 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
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CVE-2026-68080

Apache Qpid Broker-J: Unbounded echo flow responses can lead to denial of service

It was not possible to govern the rate at which the broker would respond to an echo flow, enabling an authenticated attacker to cause excessive resource usage and potential 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
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CVE-2016-4467

The C client and C-based client bindings in the Apache Qpid Proton library before 0.13.1 on Windows do not properly verify that the server hostname matches a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate when using the SChannel-based security layer, which allows man-in-the-middle attackers to spoof servers via an arbitrary valid certificate.

CVSS 3.0 · 5.9 Medium EPSS 1.6% KEV · Not listed
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CVE-2017-15701

In Apache Qpid Broker-J versions 6.1.0 through 6.1.4 (inclusive) the broker does not properly enforce a maximum frame size in AMQP 1.0 frames. A remote unauthenticated attacker could exploit this to cause the broker to exhaust all available memory and eventually terminate. Older AMQP protocols are not affected.

CVSS 3.1 · 7.5 High EPSS 4.4% KEV · Not listed
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CVE-2016-8741

qpid-java: Information leakage via specific AuthenticationProviders

The Apache Qpid Broker for Java can be configured to use different so called AuthenticationProviders to handle user authentication. Among the choices are the SCRAM-SHA-1 and SCRAM-SHA-256 AuthenticationProvider types. It was discovered that these AuthenticationProviders in Apache Qpid Broker for Java 6.0.x before 6.0.6 and 6.1.x before 6.1.1 prematurely terminate the SCRAM SASL negotiation if the provided user name does not exist thus allowing remote attacker to determine the existence of user accounts. The Vulnerability does not apply to AuthenticationProviders other than SCRAM-SHA-1 and SCRAM-SHA-256.

CVSS 3.1 · 7.5 High EPSS 6.4% KEV · Not listed
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CVE-2017-15702

qpid-java: Authentication vulnerability on HTTP ports

In Apache Qpid Broker-J 0.18 through 0.32, if the broker is configured with different authentication providers on different ports one of which is an HTTP port, then the broker can be tricked by a remote unauthenticated attacker connecting to the HTTP port into using an authentication provider that was configured on a different port. The attacker still needs valid credentials with the authentication provider on the spoofed port. This becomes an issue when the spoofed port has weaker authentication protection (e.g., anonymous access, default accounts) and is normally protected by firewall rules or similar which can be circumvented by this vulnerability. AMQP ports are not affected. Versions 6.0.0 and newer are not affected.

CVSS 3.1 · 9.8 Critical EPSS 6.2% KEV · Not listed
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CVE-2015-0224

qpid-cpp: AMQP 0-10 protocol sequence-set maximal range DoS (incomplete CVE-2015-0203 fix)

qpidd in Apache Qpid 0.30 and earlier allows remote attackers to cause a denial of service (daemon crash) via a crafted protocol sequence set. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-0203.

CVSS 3.0 · 7.5 High EPSS 15.1% KEV · Not listed
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CVE-2016-3094

qpid-java: crash in PLAIN SASL handler on malformed SASL response

PlainSaslServer.java in Apache Qpid Java before 6.0.3, when the broker is configured to allow plaintext passwords, allows remote attackers to cause a denial of service (broker termination) via a crafted authentication attempt, which triggers an uncaught exception.

CVSS 3.1 · 5.9 Medium EPSS 7.8% KEV · Not listed
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