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Critical Spring Boot CVEs

11 CVEs, 1 exploited, 2 protected by Waratek

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Product spring boot✕
Overview 11 matches · 2 protected · 1 exploited · 0 CISA KEV · 1 public PoC · 1 EPSS ≥ 0.5
11matches 2protected18.2% 1exploited9.1% 0CISA KEV0.0% 1public PoC9.1% 1EPSS ≥ 0.59.1%
Protected by Waratek 2 18.2% Rule in development 0 0.0% Mitigation candidate 0 0.0% No exploit published 9 81.8%
Critical 11 100.0% High 0 0.0% Medium 0 0.0% Low 0 0.0% None 0 0.0% Unknown 0 0.0%
blocked by ARMR today 2 18.2% partly blocked 0 0.0% not blocked 9 81.8% not established 0 0.0% unrecorded 0 0.0%
Exploited 1 9.1% Working exploit published 0 0.0% Proof of concept only 0 0.0% Forecast only 0 0.0% No public exploit 10 90.9%
split by peak 6 / year
No exploit published: 9Protected by Waratek: 2 Critical: 11 not blocked: 9blocked by ARMR today: 2 No public exploit: 10Exploited: 1
20181 Protected by Waratek1 Critical1 blocked by ARMR today1 Exploited1 20190 20200 20212 Protected by Waratek1 No exploit published1 Critical2 blocked by ARMR today1 not blocked1 No public exploit2 20221 No exploit published1 Critical1 not blocked1 No public exploit1 20231 No exploit published1 Critical1 not blocked1 No public exploit1 20240 20250 20266 No exploit published6 Critical6 not blocked6 No public exploit6
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CVE Severity Published▾ Status Exploitation Description
CVE-2026-40976 Critical 2026-04-28 No exploit published No public exploit In certain circumstances, Spring Boot's default web security is ineffective allowing unauthorized access to all endpoints. For an application to be vulnerable, it must: be a servlet-based web application; have no Spring Security configuration of its own and rely on the default web security filter chain; depend on spring-boot-actuator-autoconfigure; not depend on spring-boot-health. If any of the above does not apply, the application is not vulnerable. Affected: Spring Boot 4.0.0–4.0.5; upgrade to 4.0.6 or later per vendor advisory.
CVE-2026-40974 Critical 2026-04-28 No exploit published No public exploit 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.
CVE-2026-40971 Critical 2026-04-27 No exploit published No public exploit When configured to use an SSL bundle, Spring Boot's RabbitMQ auto-configuration does not perform hostname verification when connecting to the RabbitMQ broker. Affected: Spring Boot 4.0.0–4.0.5 (fix 4.0.6), 3.5.0–3.5.13 (fix 3.5.14) per vendor advisory.
CVE-2026-28369 Critical 2026-03-27 No exploit published No public exploit A flaw was found in Undertow. When Undertow receives an HTTP request where the first header line starts with one or more spaces, it incorrectly processes the request by stripping these leading spaces. This behavior, which violates HTTP standards, can be exploited by a remote attacker to perform request smuggling. Request smuggling allows an attacker to bypass security mechanisms, access restricted information, or manipulate web caches, potentially leading to unauthorized actions or data exposure.
CVE-2026-28368 Critical 2026-03-27 No exploit published No public exploit A flaw was found in Undertow. This vulnerability allows a remote attacker to construct specially crafted requests where header names are parsed differently by Undertow compared to upstream proxies. This discrepancy in header interpretation can be exploited to launch request smuggling attacks, potentially bypassing security controls and accessing unauthorized resources.
CVE-2026-28367 Critical 2026-03-27 No exploit published No public exploit A flaw was found in Undertow. A remote attacker can exploit this vulnerability by sending `\r\r\r` as a header block terminator. This can be used for request smuggling with certain proxy servers, such as older versions of Apache Traffic Server and Google Cloud Classic Application Load Balancer, potentially leading to unauthorized access or manipulation of web requests.
CVE-2023-20873 Critical 2023-04-20 No exploit published No public exploit In Spring Boot versions 3.0.0 - 3.0.5, 2.7.0 - 2.7.10, and older unsupported versions, an application that is deployed to Cloud Foundry could be susceptible to a security bypass. Users of affected versions should apply the following mitigation: 3.0.x users should upgrade to 3.0.6+. 2.7.x users should upgrade to 2.7.11+. Users of older, unsupported versions should upgrade to 3.0.6+ or 2.7.11+.
CVE-2022-46166 Critical 2022-12-09 No exploit published No public exploit Spring boot admins is an open source administrative user interface for management of spring boot applications. All users who run Spring Boot Admin Server, having enabled Notifiers (e.g. Teams-Notifier) and write access to environment variables via UI are affected. Users are advised to upgrade to the most recent releases of Spring Boot Admin 2.6.10 and 2.7.8 to resolve this issue. Users unable to upgrade may disable any notifier or disable write access (POST request) on `/env` actuator endpoint.
CVE-2021-26077 Critical 2021-05-10 No exploit published No public exploit Broken Authentication in Atlassian Connect Spring Boot (ACSB) in version 1.1.0 before 2.1.3 and from version 2.1.4 before 2.1.5: Atlassian Connect Spring Boot is a Java Spring Boot package for building Atlassian Connect apps. Authentication between Atlassian products and the Atlassian Connect Spring Boot app occurs with a server-to-server JWT or a context JWT. Atlassian Connect Spring Boot versions 1.1.0 before 2.1.3 and versions 2.1.4 before 2.1.5 erroneously accept context JWTs in lifecycle endpoints (such as installation) where only server-to-server JWTs should be accepted, permitting an attacker to send authenticated re-installation events to an app.
CVE-2021-26987 Critical 2021-03-15 Protected by Waratek No public exploit Element Plug-in for vCenter Server incorporates SpringBoot Framework. SpringBoot Framework versions prior to 1.3.2 are susceptible to a vulnerability which when successfully exploited could lead to Remote Code Execution. All versions of Element Plug-in for vCenter Server, Management Services versions prior to 2.17.56 and Management Node versions through 12.2 contain vulnerable versions of SpringBoot Framework.
CVE-2017-8046 Critical 2018-01-04 Protected by Waratek Exploited Malicious PATCH requests submitted to servers using Spring Data REST versions prior to 2.6.9 (Ingalls SR9), versions prior to 3.0.1 (Kay SR1) and Spring Boot versions prior to 1.5.9, 2.0 M6 can use specially crafted JSON data to run arbitrary Java code.