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CVE-2021-21349

A Server-Side Forgery Request can be activated unmarshalling with XStream to access data streams from an arbitrary URL referencing a resource in an intranet or the local host

XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is a vulnerability which may allow a remote attacker to request data from internal resources that are not publicly available only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. If you rely on XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.16.

CVSS 3.1 · 6.1 Medium EPSS 46.8% KEV · Not listed
Vendors
Apache Debian Fedoraproject and 4 more
Products
Activemq Jmeter Debian Linux and 20 more
CVE-2021-21348

XStream is vulnerable to an attack using Regular Expression for a Denial of Service (ReDos)

XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is a vulnerability which may allow a remote attacker to occupy a thread that consumes maximum CPU time and will never return. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. If you rely on XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.16.

CVSS 3.1 · 5.3 Medium EPSS 13.8% KEV · Not listed
Vendors
Apache Debian Fedoraproject and 4 more
Products
Activemq Jmeter Debian Linux and 19 more
CVE-2021-21347

XStream is vulnerable to an Arbitrary Code Execution attack

XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is a vulnerability which may allow a remote attacker to load and execute arbitrary code from a remote host only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. If you rely on XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.16.

CVSS 3.1 · 6.1 Medium EPSS 14.3% KEV · Not listed
Vendors
Apache Debian Fedoraproject and 4 more
Products
Activemq Jmeter Debian Linux and 20 more
CVE-2021-21346

XStream is vulnerable to an Arbitrary Code Execution attack

XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is a vulnerability which may allow a remote attacker to load and execute arbitrary code from a remote host only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. If you rely on XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.16.

CVSS 3.1 · 6.1 Medium EPSS 76.4% KEV · Not listed
Vendors
Apache Debian Fedoraproject and 4 more
Products
Activemq Jmeter Debian Linux and 20 more
CVE-2021-21345

XStream is vulnerable to a Remote Command Execution attack

XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is a vulnerability which may allow a remote attacker who has sufficient rights to execute commands of the host only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. If you rely on XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.16.

CVSS 3.1 · 5.8 Medium EPSS 72.3% KEV · Not listed
Vendors
Apache Debian Fedoraproject and 4 more
Products
Activemq Jmeter Debian Linux and 20 more
CVE-2021-21344

XStream is vulnerable to an Arbitrary Code Execution attack

XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is a vulnerability which may allow a remote attacker to load and execute arbitrary code from a remote host only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. If you rely on XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.16.

CVSS 3.1 · 5.3 Medium EPSS 76.0% KEV · Not listed
Vendors
Apache Debian Fedoraproject and 4 more
Products
Activemq Jmeter Debian Linux and 20 more
CVE-2021-21343

XStream is vulnerable to an Arbitrary File Deletion on the local host when unmarshalling as long as the executing process has sufficient rights

XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is a vulnerability where the processed stream at unmarshalling time contains type information to recreate the formerly written objects. XStream creates therefore new instances based on these type information. An attacker can manipulate the processed input stream and replace or inject objects, that result in the deletion of a file on the local host. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. If you rely on XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.16.

CVSS 3.1 · 5.3 Medium EPSS 46.7% KEV · Not listed
Vendors
Apache Debian Fedoraproject and 4 more
Products
Activemq Jmeter Debian Linux and 18 more
CVE-2021-21342

A Server-Side Forgery Request can be activated unmarshalling with XStream to access data streams from an arbitrary URL referencing a resource in an intranet or the local host

XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is a vulnerability where the processed stream at unmarshalling time contains type information to recreate the formerly written objects. XStream creates therefore new instances based on these type information. An attacker can manipulate the processed input stream and replace or inject objects, that result in a server-side forgery request. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. If you rely on XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.16.

CVSS 3.1 · 5.3 Medium EPSS 50.0% KEV · Not listed
Vendors
Apache Debian Fedoraproject and 4 more
Products
Activemq Jmeter Debian Linux and 18 more
CVE-2021-21341

XStream can cause a Denial of Service

XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is vulnerability which may allow a remote attacker to allocate 100% CPU time on the target system depending on CPU type or parallel execution of such a payload resulting in a denial of service only by manipulating the processed input stream. No user is affected who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. If you rely on XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.16.

CVSS 3.1 · 7.5 High EPSS 77.8% KEV · Not listed
Vendors
Apache Debian Fedoraproject and 4 more
Products
Activemq Jmeter Debian Linux and 16 more
CVE-2020-26259

XStream is vulnerable to an Arbitrary File Deletion on the local host when unmarshalling

XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.15, is vulnerable to an Arbitrary File Deletion on the local host when unmarshalling. The vulnerability may allow a remote attacker to delete arbitrary know files on the host as log as the executing process has sufficient rights only by manipulating the processed input stream. If you rely on XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.15. The reported vulnerability does not exist running Java 15 or higher. No user is affected, who followed the recommendation to setup XStream's Security Framework with a whitelist! Anyone relying on XStream's default blacklist can immediately switch to a whilelist for the allowed types to avoid the vulnerability. Users of XStream 1.4.14 or below who still want to use XStream default blacklist can use a workaround described in more detailed in the referenced advisories.

CVSS 3.1 · 6.8 Medium EPSS 82.4% KEV · Not listed
Vendors
Apache Debian Fedoraproject and 2 more
Products
Struts Debian Linux Fedora and 7 more
CVE-2020-26258

Server-Side Forgery Request can be activated unmarshalling with XStream

XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.15, a Server-Side Forgery Request vulnerability can be activated when unmarshalling. The vulnerability may allow a remote attacker to request data from internal resources that are not publicly available only by manipulating the processed input stream. If you rely on XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.15. The reported vulnerability does not exist if running Java 15 or higher. No user is affected who followed the recommendation to setup XStream's Security Framework with a whitelist! Anyone relying on XStream's default blacklist can immediately switch to a whilelist for the allowed types to avoid the vulnerability. Users of XStream 1.4.14 or below who still want to use XStream default blacklist can use a workaround described in more detailed in the referenced advisories.

CVSS 3.1 · 6.3 Medium EPSS 81.8% KEV · Not listed
Vendors
Apache Debian Fedoraproject and 2 more
Products
Struts Debian Linux Fedora and 7 more
CVE-2020-26217

Remote Code Execution in XStream

XStream before version 1.4.14 is vulnerable to Remote Code Execution.The vulnerability may allow a remote attacker to run arbitrary shell commands only by manipulating the processed input stream. Only users who rely on blocklists are affected. Anyone using XStream's Security Framework allowlist is not affected. The linked advisory provides code workarounds for users who cannot upgrade. The issue is fixed in version 1.4.14.

CVSS 3.1 · 8 High EPSS 85.0% KEV · Not listed
Vendors
Apache Debian Netapp and 3 more
Products
Activemq Debian Linux Snapmanager and 20 more
CVE-2022-42004

jackson-databind: use of deeply nested arrays

In FasterXML jackson-databind before 2.13.4, resource exhaustion can occur because of a lack of a check in BeanDeserializer._deserializeFromArray to prevent use of deeply nested arrays. An application is vulnerable only with certain customized choices for deserialization.

CVSS 3.1 · 7.5 High EPSS 3.4% KEV · Not listed
Vendors
Debian Fasterxml Netapp and 2 more
Products
Debian Linux Jackson-databind Oncommand Workflow Automation and 17 more
CVE-2022-42003

jackson-databind: deep wrapper array nesting wrt UNWRAP_SINGLE_VALUE_ARRAYS

In FasterXML jackson-databind before versions 2.13.4.1 and 2.12.17.1, resource exhaustion can occur because of a lack of a check in primitive value deserializers to avoid deep wrapper array nesting, when the UNWRAP_SINGLE_VALUE_ARRAYS feature is enabled.

CVSS 3.1 · 7.5 High EPSS 3.4% KEV · Not listed
Vendors
Debian Fasterxml Netapp and 2 more
Products
Debian Linux Jackson-databind Oncommand Workflow Automation and 20 more
CVE-2026-85511

Wildfly-elytron-realm-token: parameter injection in eap's elytron oauth2

A flaw was found in EAP's Elytron. An EAP application whose security domain is backed by an Elytron token-realm with oauth2-introspection would allow parameter substitution due to missing URL encoding.

CVSS 3.1 · 4.2 Medium EPSS < 1% KEV · Not listed
Vendors
Redhat
Products
Jboss Data Grid Jboss Enterprise Application Platform Jboss Enterprise Application Platform Expansion Pack and 3 more
CVE-2026-17526

Keycloak-services: keycloak-services: privilege escalation via impersonation role allows takeover of realm administrator accounts

Keycloak is an open-source identity and access management solution. A vulnerability was discovered where a user with the impersonation role can impersonate a realm administrator. This allows the attacker to gain full administrative control over the realm, including the ability to manage users, clients, and roles.

CVSS 3.1 · 7.2 High EPSS < 1% KEV · Not listed
Vendors
Redhat
Products
Build Keycloak Build Of Keycloak Data Grid 8 and 4 more
CVE-2026-18212

Keycloak-services: keycloak-services: saml redirect deflate helpers leak native zlib state

A flaw was found in the SAML Redirect Binding implementation of Keycloak, an open-source identity and access management solution. The issue occurs because the custom DEFLATE compression and decompression helpers fail to release native zlib memory after use. An unauthenticated attacker can exploit this by sending repeated malformed SAML requests, leading to native memory exhaustion and a denial of service.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Redhat
Products
Build Keycloak Jboss Data Grid Jbosseapxp and 1 more
CVE-2026-18209

Keycloak-services: keycloak-services: oidc redirect_uri fragment bypass in http parameter pollution check

A flaw was found in the keycloak-services component of Keycloak, which handles OpenID Connect (OIDC) authentication flows. The issue occurs because the security check designed to prevent HTTP parameter pollution only inspects the query portion of a redirect URL and ignores the fragment portion. When a client is configured with a wildcard redirect URI, an attacker can use this to inject duplicate security parameters into the login response. If a client application is not configured correctly, it might trust the attacker's injected data instead of the real security information from Keycloak, leading to session fixation or account confusion.

CVSS 3.1 · 3.4 Low EPSS < 1% KEV · Not listed
Vendors
Redhat
Products
Build Keycloak Build Of Keycloak Data Grid and 5 more