Applications that evaluate user-supplied Spring Expression Language (SpEL) expressions are vulnerable to an Algorithmic Denial of Service (DoS). By providing a specially crafted expression, an attacker can trigger excessive resource consumption during evaluation, leading to application degradation or unavailability. Affected versions: Spring Framework 7.0.0 through 7.0.7; 6.2.0 through 6.2.18; 6.1.0 through 6.1.27; 5.3.0 through 5.3.48.

According to its self-reported version number, the Atlassian Crowd application running on the remote host is prior to 7.2.2. It is, therefore, affected by multiple vulnerabilities, including flaws in bundled third-party dependencies :

- A broken authentication and session management vulnerability in Atlassian Crowd. (CVE-2026-21582)

- Multiple denial of service vulnerabilities in the bundled Netty dependency. (CVE-2026-56745, CVE-2026-59901, CVE-2026-45416, CVE-2026-55831, CVE-2026-55833, CVE-2026-48043, CVE-2026-56819)

- Multiple injection vulnerabilities in the bundled axios dependency. (CVE-2026-44494, CVE-2026-42041, CVE-2026-44490, CVE-2026-42035, CVE-2026-42033)

- A server-side request forgery (SSRF) vulnerability in the bundled axios dependency. (CVE-2026-44492)

- Multiple information disclosure vulnerabilities in the bundled axios dependency. (CVE-2026-67320, CVE-2026-44487, CVE-2026-44486)

- A SQL injection vulnerability in the bundled Hibernate ORM dependency. (CVE-2026-0603)

- A man-in-the-middle vulnerability in the bundled PostgreSQL JDBC Driver dependency. (CVE-2026-54291)

- A denial of service vulnerability in the bundled underscore dependency. (CVE-2026-27601)

- Multiple insecure deserialization vulnerabilities in the bundled jackson-databind dependency. (CVE-2026-54513, CVE-2026-54512)

- An improper authorization vulnerability in the bundled Netty dependency. (CVE-2026-44249)

- A broken authentication and session management vulnerability in the bundled Spring Security dependency. (CVE-2026-47838)

- A denial of service vulnerability in the bundled Apache Tomcat dependency. (CVE-2026-41284)

- Multiple denial of service vulnerabilities in the bundled Spring Framework dependency. (CVE-2026-41842, CVE-2026-41851, CVE-2026-41850)

- A man-in-the-middle vulnerability in the bundled Netty dependency. (CVE-2026-50010)

- Multiple denial of service vulnerabilities in the bundled axios dependency. (CVE-2026-44496, CVE-2026-44488)

- Multiple denial of service vulnerabilities in the bundled Micrometer dependency. (CVE-2026-40983, CVE-2026-40984)

- An information disclosure vulnerability in the bundled postcss dependency. (CVE-2026-45623)

- A business logic vulnerability in the bundled Apache Tomcat dependency. (CVE-2026-43513)

- An injection vulnerability in the bundled js-cookie dependency. (CVE-2026-46625)

- A cross-site scripting (XSS) vulnerability in the bundled Spring Framework dependency. (CVE-2026-41845)

- A remote code execution vulnerability in the bundled axios dependency. (CVE-2026-44495)

Note that the scanner has not tested for these issues but has instead relied only on the application's self-reported version number.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - Applications that evaluate user-supplied Spring Expression Language (SpEL) expressions are vulnerable to
    an Algorithmic Denial of Service (DoS). By providing a specially crafted expression, an attacker can
    trigger excessive resource consumption during evaluation, leading to application degradation or
    unavailability. Affected versions: Spring Framework 7.0.0 through 7.0.7; 6.2.0 through 6.2.18; 6.1.0
    through 6.1.27; 5.3.0 through 5.3.48. (CVE-2026-41850)

The version of AOS installed on the remote host is prior to 7.6.0.6. It is, therefore, affected by multiple vulnerabilities as referenced in the NXSA-AOS-7.6.0.6 advisory.

  - In an untrusted JMS environment, org.springframework.jms.support.converter.MappingJackson2MessageConverter     and org.springframework.jms.support.converter.JacksonJsonMessageConverter allow arbitrary class     instantiation, which can lead to unauthorized actions via gadget class deserialization. Affected versions:
    Spring Framework 7.0.0 through 7.0.7; 6.2.0 through 6.2.18; 6.1.0 through 6.1.27; 5.3.0 through 5.3.48.
    (CVE-2026-41855)

  - Postfix before 3.8.16, 3.9 before 3.9.10, and 3.10 before 3.10.9 sometimes allows a buffer over-read and     process crash via an enhanced status code that lacks text after the third number. (CVE-2026-43964)

  - Improper encoding of non-finite floating-point values during MapMessage JSON serialization in Apache Log4j     API produces output that is not valid JSON. This issue affects Apache Log4j API versions 2.13.1 through     2.25.4 and version 2.26.0. The fix for CVE-2026-34481 did not cover all code paths: when a MapMessage     contains a non-finite IEEE 754 value (NaN, Infinity, or -Infinity), MapMessage.asJson() emits the     corresponding bare token. RFC 8259 does not permit these tokens, so a conformant parser rejects the     resulting document. The defect is reachable only when both of the following conditions hold: * The     application uses the message resolver https://logging.apache.org/log4j/2.x/manual/json-template-     layout.html#event-template-resolver-message of JsonTemplateLayout or any other layout that relies on     MapMessage.asJson() or MapMessage.getFormattedMessage(new String[]{JSON}). * The application logs a     MapMessage that contains an attacker-controlled floating-point value. An attacker who can supply a non-     finite value can cause the affected layout to emit malformed JSON, which may corrupt the enclosing log     record or disrupt downstream log ingestion and parsing. Users are advised to upgrade to Apache Log4j API     2.25.5 or 2.26.1, both of which emit RFC 8259-compliant JSON for non-finite values. (CVE-2026-49844)

  - An authentication bypass vulnerability exists in the OAuth2 TokenIntrospectionService in Apache CXF. Due     to a missing 'throw' keyword in the security context check, the introspection endpoint     (/services/oauth2/introspect) can be accessed by any unauthenticated network attacker. However note that     this is a safeguard only in the case that someone forgot to enable authentication on the service. Users     are recommended to upgrade to version 4.2.2 or 4.1.7 or 3.6.12, which fixes this issue. (CVE-2026-50623)

  - The 'clientId' parameter from incoming HTTP requests is directly concatenated into OAuth2 server log     warning messages without sanitizing control characters. This allows an attacker to inject arbitrary     content, including fake log entries, into the server's log files. Users are recommended to upgrade to     versions 4.2.2 or 4.1.7 or 3.6.12, which fixes this issue. (CVE-2026-50629)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of Spring Framework installed on the remote host is 5.3.x prior to 5.3.49, 6.1.x prior to 6.1.28, 6.2.x prior to 6.2.18.1, or 7.0.x prior to 7.0.7.1. It is, therefore, affected by multiple vulnerabilities:

  - IDs for WebSocket sessions in the spring-websocket module are not cryptographically unpredictable, which may be     possible to exploit in combination with inadequate authorization rules. (CVE-2026-41838)

  - Applications may be vulnerable to a Regular Expression Denial of Service (ReDoS) attack if an attacker is able to     provide a pattern which is then directly or indirectly supplied to one of the following methods in AntPathMatcher:
    match, matchStart, extractUriTemplateVariables. (CVE-2026-41848)

  - In an untrusted JMS environment, org.springframework.jms.support.converter.MappingJackson2MessageConverter and     org.springframework.jms.support.converter.JacksonJsonMessageConverter allow arbitrary class instantiation, which     can lead to unauthorized actions via gadget class deserialization. (CVE-2026-41855)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Applications that evaluate user-supplied Spring Expression Language (SpEL) expressions are vulnerable to     an Algorithmic Denial of Service (DoS). By providing a specially crafted expression, an attacker can     trigger excessive resource consumption during evaluation, leading to application degradation or     unavailability. Affected versions: Spring Framework 7.0.0 through 7.0.7; 6.2.0 through 6.2.18; 6.1.0     through 6.1.27; 5.3.0 through 5.3.48. (CVE-2026-41850)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
115706	Atlassian Crowd < 7.2.2 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	Version Based	high
464110	Echo: org.springframework:spring-expression: security update to 6.2.19	Tenable Cloud Security	Echo Local Security Checks	Local	high
464110	Echo: org.springframework:spring-expression: security update to 6.2.19	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	high
341612	Nutanix AOS : Multiple Vulnerabilities (NXSA-AOS-7.6.0.6)	Nessus	Misc.	Local	high
445504	SCA: security update for org.springframework:spring-expression (GHSA-r5w3-xv2f-j59q)	Tenable Cloud Security	SCA Checks	Local	high
445504	SCA: security update for org.springframework:spring-expression (GHSA-r5w3-xv2f-j59q)	Tenable Self-Hosted Container Security	SCA Checks	Local	high
320777	Spring Framework 5.3.x < 5.3.49 / 6.1.x < 6.1.28 / 6.2.x < 6.2.18.1 / 7.0.x < 7.0.7.1 Multiple Vulnerabilities	Nessus	Misc.	Local	critical
320037	Linux Distros Unpatched Vulnerability : CVE-2026-41850	Nessus	Misc.	Local	high

Detections

Analytics

CVE-2026-41850

high

Tenable Plugins

high

high

high

high

high

high

critical

high