Security Bulletin: Multiple Vulnerabilities in IBM Library Support for Spring

Vulnerability Details

CVEID:   CVE-2026-40972
DESCRIPTION:   An attacker on the same network as the remote application may be able to utilize a timing attack to discover information about the remote secret. In extreme circumstances this could result in the attacker determining the secret and uploading changed classes, thereby achieving remote code execution in the remote application. Affected: Spring Boot 4.0.0–4.0.5 (fix 4.0.6), 3.5.0–3.5.13 (fix 3.5.14), 3.4.0–3.4.15 (fix 3.4.16), 3.3.0–3.3.18 (fix 3.3.19), 2.7.0–2.7.32 (fix 2.7.33); DevTools remote secret comparison. Versions that are no longer supported are also affected per vendor advisory.
CWE:   CWE-208: Observable Timing Discrepancy
CVSS Source:   security@vmware.com
CVSS Base score:   7.5
CVSS Vector:   (CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)

CVEID:   CVE-2026-40973
DESCRIPTION:   A local attacker on the same host as the application may be able to take control of the directory used by `ApplicationTemp`. When `server.servlet.session.persistent` is set to `true` and the attack persists across application restarts, this may allow the attacker to read session information and hijack authenticated users or deploy a gadget chain and execute code as the application's user. Affected: Spring Boot 4.0.0–4.0.5 (fix 4.0.6), 3.5.0–3.5.13 (fix 3.5.14), 3.4.0–3.4.15 (fix 3.4.16), 3.3.0–3.3.18 (fix 3.3.19), 2.7.0–2.7.32 (fix 2.7.33); predictable temp directory / `ApplicationTemp` ownership verification. Versions that are no longer supported are also affected per vendor advisory.
CWE:   CWE-377: Insecure Temporary File
CVSS Source:   security@vmware.com
CVSS Base score:   7
CVSS Vector:   (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H)

CVEID:   CVE-2026-40974
DESCRIPTION:   Spring Boot's Cassandra auto-configuration does not perform hostname verification when establishing an SSL connection to Cassandra. Affected: Spring Boot 4.0.0–4.0.5 (fix 4.0.6), 3.5.0–3.5.13 (fix 3.5.14), 3.4.0–3.4.15 (fix 3.4.16), 3.3.0–3.3.18 (fix 3.3.19), 2.7.0–2.7.32 (fix 2.7.33); Cassandra SSL auto-configuration. Versions that are no longer supported are also affected per vendor advisory.
CWE:   CWE-295: Improper Certificate Validation
CVSS Source:   NVD
CVSS Base score:   9.8
CVSS Vector:   (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

CVEID:   CVE-2026-40975
DESCRIPTION:   Values produced by ${random.value} are not suitable for use as secrets. ${random.uuid} is not affected. ${random.int} and ${random.long} should never be used for secrets as they are numeric values with a predictable range. Affected: Spring Boot 4.0.0–4.0.5 (fix 4.0.6), 3.5.0–3.5.13 (fix 3.5.14), 3.4.0–3.4.15 (fix 3.4.16), 3.3.0–3.3.18 (fix 3.3.19), 2.7.0–2.7.32 (fix 2.7.33); random value property source / weak PRNG for secrets. Versions that are no longer supported are also affected per vendor advisory.
CWE:   CWE-330: Use of Insufficiently Random Values
CVSS Source:   NVD
CVSS Base score:   7.5
CVSS Vector:   (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)

CVEID:   CVE-2026-40977
DESCRIPTION:   When an application is configured to use `ApplicationPidFileWriter`, a local attacker with write access to the PID file's location can corrupt one file on the host each time the application is started. Affected: Spring Boot 4.0.0–4.0.5 (fix 4.0.6), 3.5.0–3.5.13 (fix 3.5.14), 3.4.0–3.4.15 (fix 3.4.16), 3.3.0–3.3.18 (fix 3.3.19), 2.7.0–2.7.32 (fix 2.7.33); PID file / symlink behavior (`ApplicationPidFileWriter`). Versions that are no longer supported are also affected per vendor advisory.
CWE:   CWE-59: Improper Link Resolution Before File Access ('Link Following')
CVSS Source:   NVD
CVSS Base score:   6.7
CVSS Vector:   (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H)

CVEID:   CVE-2026-22733
DESCRIPTION:   Spring Boot applications with Actuator can be vulnerable to an "Authentication Bypass" vulnerability when an application endpoint that requires authentication is declared under the path used by the CloudFoundry Actuator endpoints. This issue affects Spring Security: from 4.0.0 through 4.0.3, from 3.5.0 through 3.5.11, from 3.4.0 through 3.4.14, from 3.3.0 through 3.3.17, from 2.7.0 through 2.7.31.
CWE:   CWE-288: Authentication Bypass Using an Alternate Path or Channel
CVSS Source:   NVD
CVSS Base score:   8.1
CVSS Vector:   (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)

CVEID:   CVE-2026-22746
DESCRIPTION:   Vulnerability in Spring Spring Security. If an application is using the UserDetails#isEnabled, #isAccountNonExpired, or #isAccountNonLocked user attributes, to enable, expire, or lock users, then DaoAuthenticationProvider's timing attack defense can be bypassed for users who are disabled, expired, or locked.This issue affects Spring Security: from 5.7.0 through 5.7.22, from 5.8.0 through 5.8.24, from 6.3.0 through 6.3.15, from 6.5.0 through 6.5.9, from 7.0.0 through 7.0.4.
CWE:   CWE-208: Observable Timing Discrepancy
CVSS Source:   security@vmware.com
CVSS Base score:   3.7
CVSS Vector:   (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N)

CVEID:   CVE-2026-22748
DESCRIPTION:   Vulnerability in Spring Spring Security. When an application configures JWT decoding with NimbusJwtDecoder  or NimbusReactiveJwtDecoder, it must configure an OAuth2TokenValidatorJwt separately, for example by calling setJwtValidator.This issue affects Spring Security: from 6.3.0 through 6.3.14, from 6.4.0 through 6.4.14, from 6.5.0 through 6.5.9, from 7.0.0 through 7.0.4.
CWE:   CWE-20: Improper Input Validation
CVSS Source:   NVD
CVSS Base score:   6.5
CVSS Vector:   (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N)

CVEID:   CVE-2026-22732
DESCRIPTION:   When applications specify HTTP response headers for servlet applications using Spring Security, there is the possibility that the HTTP Headers will not be written.  This issue affects Spring Security Servlet applications using lazy (default) writing of HTTP Headers: : from 5.7.0 through 5.7.21, from 5.8.0 through 5.8.23, from 6.3.0 through 6.3.14, from 6.4.0 through 6.4.14, from 6.5.0 through 6.5.8, from 7.0.0 through 7.0.3.
CWE:   CWE-425: Direct Request ('Forced Browsing')
CVSS Source:   security@vmware.com
CVSS Base score:   9.1
CVSS Vector:   (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N)

CVEID:   CVE-2026-22752
DESCRIPTION:   Spring Security Authorization Server Dynamic Client Registration endpoints perform insufficient validation of certain client metadata fields when explicitly enabled.

An attacker possessing a valid Initial Access Token can dynamically register a malicious client with crafted metadata. Depending on the metadata provided and the Authorization Server's configuration, this can lead to Stored Cross-Site Scripting (XSS), Privilege Escalation, or Server-Side Request Forgery (SSRF).
CWE:   CWE-918: Server-Side Request Forgery (SSRF)
CVSS Source:   VMware
CVSS Base score:   9.6
CVSS Vector:   (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N)

CVEID:   CVE-2026-22740
DESCRIPTION:   A WebFlux server application that processes multipart requests creates temp files for parts larger than 10 K. Under some circumstances, temp files may remain not deleted after the request is fully processed. This allows an attacker to consume available disk space. Older, unsupported versions are also affected.
CWE:   CWE-400: Uncontrolled Resource Consumption
CVSS Source:   security@vmware.com
CVSS Base score:   6.5
CVSS Vector:   (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)

CVEID:   CVE-2026-22741
DESCRIPTION:   Spring MVC and WebFlux applications are vulnerable to cache poisoning when resolving static resources. More precisely, an application can be vulnerable when all the following are true: * the application is using Spring MVC or Spring WebFlux * the application is configuring the  resource chain support https://docs.spring.io/spring-framework/reference/web/webmvc/mvc-config…  with caching enabled * the application adds support for encoded resources resolution * the resource cache must be empty when the attacker has access to the application When all the conditions above are met, the attacker can send malicious requests and poison the resource cache with resources using the wrong encoding. This can cause a denial of service by breaking the front-end application for clients.
CWE:   CWE-524: Use of Cache Containing Sensitive Information
CVSS Source:   security@vmware.com
CVSS Base score:   3.1
CVSS Vector:   (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L)

CVEID:   CVE-2026-22745
DESCRIPTION:   Spring MVC and WebFlux applications are vulnerable to Denial of Service attacks when resolving static resources. More precisely, an application can be vulnerable when all the following are true: * the application is using Spring MVC or Spring WebFlux * the application is serving static resources from the file system * the application is running on a Windows platform When all the conditions above are met, the attacker can send malicious requests that are slow to resolve and that can keep HTTP connections in use. This can cause a Denial of Service on the application.
CWE:   CWE-400: Uncontrolled Resource Consumption
CVSS Source:   security@vmware.com
CVSS Base score:   5.3
CVSS Vector:   (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)

CVEID:   CVE-2025-41249
DESCRIPTION:   The Spring Framework annotation detection mechanism may not correctly resolve annotations on methods within type hierarchies with a parameterized super type with unbounded generics. This can be an issue if such annotations are used for authorization decisions. Your application may be affected by this if you are using Spring Security's @EnableMethodSecurity feature. You are not affected by this if you are not using @EnableMethodSecurity or if you do not use security annotations on methods in generic superclasses or generic interfaces. This CVE is published in conjunction with CVE-2025-41248 https://spring.io/security/cve-2025-41248 .
CWE:   CWE-285: Improper Authorization
CVSS Source:   security@vmware.com
CVSS Base score:   7.5
CVSS Vector:   (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)

CVEID:   CVE-2025-41242
DESCRIPTION:   Spring Framework MVC applications can be vulnerable to a “Path Traversal Vulnerability” when deployed on a non-compliant Servlet container. An application can be vulnerable when all the following are true: * the application is deployed as a WAR or with an embedded Servlet container * the Servlet container does not reject suspicious sequences https://jakarta.ee/specifications/servlet/6.1/jakarta-servlet-spec-6.1… * the application serves static resources https://docs.spring.io/spring-framework/reference/web/webmvc/mvc-config…  with Spring resource handling We have verified that applications deployed on Apache Tomcat or Eclipse Jetty are not vulnerable, as long as default security features are not disabled in the configuration. Because we cannot check exploits against all Servlet containers and configuration variants, we strongly recommend upgrading your application.
CWE:   CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CVSS Source:   security@vmware.com
CVSS Base score:   5.9
CVSS Vector:   (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)

CVEID:   CVE-2025-41254
DESCRIPTION:   STOMP over WebSocket applications may be vulnerable to a security bypass that allows an attacker to send unauthorized messages. Affected Spring Products and VersionsSpring Framework: * 6.2.0 - 6.2.11 * 6.1.0 - 6.1.23 * 6.0.x - 6.0.29 * 5.3.0 - 5.3.45 * Older, unsupported versions are also affected. MitigationUsers of affected versions should upgrade to the corresponding fixed version. Affected version(s)Fix versionAvailability6.2.x6.2.12OSS6.1.x6.1.24 Commercial https://enterprise.spring.io/ 6.0.xN/A Out of support https://spring.io/projects/spring-framework#support 5.3.x5.3.46 Commercial https://enterprise.spring.io/ No further mitigation steps are necessary. CreditThis vulnerability was discovered and responsibly reported by Jannis Kaiser.
CWE:   CWE-352: Cross-Site Request Forgery (CSRF)
CVSS Source:   security@vmware.com
CVSS Base score:   4.3
CVSS Vector:   (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N)

CVEID:   CVE-2026-22735
DESCRIPTION:   Spring MVC and WebFlux applications are vulnerable to stream corruption when using Server-Sent Events (SSE). This issue affects Spring Foundation: from 7.0.0 through 7.0.5, from 6.2.0 through 6.2.16, from 6.1.0 through 6.1.25, from 5.3.0 through 5.3.46.
CWE:   CWE-667: Improper Locking
CVSS Source:   security@vmware.com
CVSS Base score:   2.6
CVSS Vector:   (CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:N)

CVEID:   CVE-2026-22737
DESCRIPTION:   Use of Java scripting engine enabled (e.g. JRuby, Jython) template views in Spring MVC and Spring WebFlux applications can result in disclosure of content from files outside the configured locations for script template views. This issue affects Spring Framework: from 7.0.0 through 7.0.5, from 6.2.0 through 6.2.16, from 6.1.0 through 6.1.25, from 5.3.0 through 5.3.46.
CWE:   CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CVSS Source:   security@vmware.com
CVSS Base score:   5.9
CVSS Vector:   (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)