CVE-2026-71374 in Cosminexus Component Container
Summary
by MITRE • 09/08/2026
Deserialization of untrusted data vulnerability in Cosminexus Component Container.
This issue affects Cosminexus Component Container: from 11-70-01 before 11-70-03, from 11-60 before 11-60-03, from 11-50 through 11-50-03, from 11-40 through 11-40-03, from 11-30 through 11-30-08, from 11-20 before 11-20-10, from 11-10 through 11-10-11, from 11-00 before 11-00-13, from 09-87 before 09-87-10, from 09-80 before 09-80-05, from 09-70 before 09-70-28, from 09-50 through 09-50-22, and from 09-00 through 09-00-18.
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Analysis
by VulDB Data Team • 09/08/2026
The vulnerability identified in the Cosminexus Component Container represents a critical security flaw rooted in the improper handling of serialized data objects during runtime operations. This issue specifically affects versions ranging from early releases such as 09-00 through to recent updates like 11-70, indicating that this is a long-standing architectural weakness present across multiple major and minor version lines. The core technical failure lies in the application's ability to accept and process untrusted data without sufficient validation or sanitization prior to deserialization. When an attacker provides maliciously crafted serialized objects as input, the system attempts to reconstruct these objects into executable code structures within its memory space. This process bypasses standard security controls because the underlying framework trusts the integrity of the incoming stream implicitly, allowing for arbitrary object instantiation that was not intended by the application developers.
From a technical perspective, this flaw aligns with CWE-502, which describes Deserialization of Untrusted Data as a significant weakness in software design and implementation. The vulnerability exploits the inherent risks associated with Java-based or similar serialization mechanisms where class definitions are dynamically loaded based on content within the serialized stream. By manipulating the payload, an attacker can inject gadget chains—sequences of existing application methods that perform dangerous operations when executed during deserialization. These gadgets often include functionality for file system access, network communication, or command execution. Because the vulnerability exists in a component container, it likely impacts multiple applications hosted on the same infrastructure, amplifying the potential blast radius beyond a single isolated service to potentially compromise the entire middleware environment if not properly segmented or secured.
The operational impact of this vulnerability is severe and multifaceted. Successful exploitation can lead to Remote Code Execution (RCE), granting an attacker full control over the underlying server operating system depending on the privileges under which the Cosminexus Component Container runs. This level of access allows for complete data exfiltration, modification of critical business logic, or use of the compromised host as a pivot point for further lateral movement within the network. Furthermore, attackers may leverage this flaw to cause Denial of Service conditions by triggering memory exhaustion through infinite recursion loops embedded in malicious payloads. The broad version range affected suggests that many organizations have been running vulnerable instances for extended periods without patching, increasing the likelihood of active exploitation in the wild by automated scanning tools and threat actors targeting legacy enterprise middleware solutions.
Mitigation strategies must prioritize immediate remediation alongside defensive monitoring measures. The primary defense is to upgrade the Cosminexus Component Container software to a version that includes patches addressing this deserialization flaw, specifically versions 11-70-03 or later for the latest branch, and corresponding fixed releases for older supported lines such as 11-60-03, 11-50-03, and so on. For environments where immediate upgrading is not feasible due to compatibility constraints, implementing strict input validation at the application boundary is essential. This includes rejecting any serialized data that does not originate from trusted sources or adhering to a whitelist of expected class types during deserialization processes. Additionally, deploying Web Application Firewalls with rules capable of detecting known malicious serialization patterns can provide an additional layer of defense-in-depth.
To align with industry-standard threat modeling frameworks, this vulnerability maps directly to the MITRE ATT&CK technique T1059, specifically Command and Scripting Interpreter sub-techniques when exploitation leads to code execution, or more broadly to Initial Access vectors involving Trusted Software if the attack chain begins by compromising a trusted component. It also relates to Defense Evasion tactics where attackers hide malicious payloads within legitimate-looking data streams. Security teams should conduct thorough inventory assessments to identify all instances of affected Cosminexus versions across their infrastructure and prioritize patching efforts based on exposure levels. Regular security audits focusing on serialization practices, including the use of secure deserialization libraries that enforce type checking, will help prevent similar vulnerabilities in future development cycles or third-party integrations within the enterprise architecture.