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CVE-2026-5588

Опубликовано: 15 апр. 2026
Источник: redhat
CVSS3: 7.5

Описание

Use of a Broken or Risky Cryptographic Algorithm vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA bcpkix on all (pkix modules), Legion of the Bouncy Castle Inc. BCPKIX-FIPS bcpkix on All (pkix modules), Legion of the Bouncy Castle Inc. BCPIX-LTS bcpkix on All (pkix modules). This vulnerability is associated with program files JcaContentVerifierProviderBuilder.Java, JcaContentVerfierProviderBuilder.Java. This issue affects BC-JAVA: from 1.67 before 1.80.2, from 1.81 before 1.81.1, from 1.82 before 1.84; BCPKIX-FIPS: from 2.0.6 before 2.0.11, from 2.1.7 before 2.1.11; BCPIX-LTS: from 2.73.7 before 2.73.11.

A flaw was found in Legion of the Bouncy Castle Inc. BC-JAVA bcpkix. The PKIX draft CompositeVerifier implementation improperly accepts an empty signature sequence as a valid cryptographic signature. This issue allows a remote attacker to bypass signature verification mechanisms, potentially compromising the authenticity and integrity of data.

Отчет

To exploit this issue, an attacker needs to submit a crafted payload or token containing an empty signature sequence to an application using the CompositeVerifier for cryptographic validation. An attack typically requires the application to process this malformed data and improperly accept the empty sequence as a valid signature, bypassing standard verification checks. The primary impact of this vulnerability is the compromise of data authenticity and integrity, allowing an attacker to forge digital signatures and impersonate trusted entities.

Меры по смягчению последствий

To mitigate this flaw, check that the signature sequence is not empty before passing any data to the CompositeVerifier for cryptographic validation. If the sequence is empty or null, explicitly reject the payload before it is processed.

Затронутые пакеты

ПлатформаПакетСостояниеРекомендацияРелиз
Cryostat 4bcpkix-jdk18onNot affected
OpenShift Developer Tools and ServicesjenkinsAffected
OpenShift Developer Tools and Servicesjenkins-2-pluginsAffected
OpenShift Developer Tools and Servicesocp-tools-4/jenkins-rhel8Affected
OpenShift Developer Tools and Servicesocp-tools-4/jenkins-rhel9Affected
Red Hat AMQ Broker 7bcpkix-jdk15onNot affected
Red Hat build of Apache Camel 4 for Quarkus 3bcpkix-jdk18onAffected
Red Hat build of Apicurio Registry 3bcpkix-jdk18onNot affected
Red Hat build of Debezium 3bcpkix-jdk18onWill not fix
Red Hat Data Grid 8bcpkix-jdk15onNot affected

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Дополнительная информация

Статус:

Important
Дефект:
CWE-347
https://bugzilla.redhat.com/show_bug.cgi?id=2458634bouncycastle: BC-JAVA: PKIX draft CompositeVerifier accepts empty signature sequence as valid

7.5 High

CVSS3

Связанные уязвимости

CVSS3: 7.5
ubuntu
4 месяца назад

Use of a Broken or Risky Cryptographic Algorithm vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA bcpkix on all (pkix modules), Legion of the Bouncy Castle Inc. BCPKIX-FIPS bcpkix on All (pkix modules), Legion of the Bouncy Castle Inc. BCPIX-LTS bcpkix on All (pkix modules). This vulnerability is associated with program files JcaContentVerifierProviderBuilder.Java, JcaContentVerfierProviderBuilder.Java. This issue affects BC-JAVA: from 1.67 before 1.80.2, from 1.81 before 1.81.1, from 1.82 before 1.84; BCPKIX-FIPS: from 2.0.6 before 2.0.11, from 2.1.7 before 2.1.11; BCPIX-LTS: from 2.73.7 before 2.73.11.

CVSS3: 7.5
nvd
4 месяца назад

Use of a Broken or Risky Cryptographic Algorithm vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA bcpkix on all (pkix modules), Legion of the Bouncy Castle Inc. BCPKIX-FIPS bcpkix on All (pkix modules), Legion of the Bouncy Castle Inc. BCPIX-LTS bcpkix on All (pkix modules). This vulnerability is associated with program files JcaContentVerifierProviderBuilder.Java, JcaContentVerfierProviderBuilder.Java. This issue affects BC-JAVA: from 1.67 before 1.80.2, from 1.81 before 1.81.1, from 1.82 before 1.84; BCPKIX-FIPS: from 2.0.6 before 2.0.11, from 2.1.7 before 2.1.11; BCPIX-LTS: from 2.73.7 before 2.73.11.

CVSS3: 7.5
debian
4 месяца назад

Use of a Broken or Risky Cryptographic Algorithm vulnerability in Legi ...

github
4 месяца назад

Bouncy Castle Crypto Package For Java: Use of a Broken or Risky Cryptographic Algorithm vulnerability in bcpkix modules

suse-cvrf
3 месяца назад

Security update for bouncycastle

7.5 High

CVSS3