CVE-2026-87414 in Solaris
Summary
by MITRE • 10/21/2026
Vulnerability in the Oracle Solaris product of Oracle Systems (component: Image Packaging System). The supported version that is affected is 11.4. Difficult to exploit vulnerability allows unauthenticated attacker with network access via TLS to compromise Oracle Solaris. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle Solaris accessible data. CVSS 3.1 Base Score 3.1 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N).
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Analysis
by VulDB Data Team • 10/21/2026
The vulnerability identified within the Oracle Solaris Image Packaging System represents a significant integrity risk for systems running version 11.4 and potentially other supported releases that utilize this component. The Image Packaging System is responsible for managing software packages, including installation, updates, and removal of system components on Oracle Solaris operating environments. This specific flaw allows an unauthenticated attacker with network access via TLS to compromise the integrity of the system by facilitating unauthorized modifications to accessible data. Although the vulnerability requires human interaction from a person other than the attacker to be successfully exploited, its existence indicates a fundamental weakness in how package updates or installations are validated and processed during transmission or execution phases involving TLS connections.
From a technical perspective, the core issue lies in the insufficient validation mechanisms within the Image Packaging System when handling incoming data over secure transport layers. While TLS provides encryption and basic integrity checks for the channel itself, this vulnerability suggests that the application layer fails to adequately verify the authenticity or consistency of package metadata or payload content before processing it. This gap enables an attacker who can influence the network traffic or trick a user into interacting with maliciously crafted package sources to inject unauthorized updates, insert new data, or delete existing system files. The requirement for human interaction implies that social engineering tactics are likely necessary, such as convincing a system administrator to approve or install a compromised package from what appears to be a legitimate but manipulated source.
The operational impact of this vulnerability is primarily centered on integrity rather than confidentiality or availability, as indicated by the CVSS 3.1 base score of 3.1 and the vector string (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N). The low complexity and high attack vector suggest that while exploitation is not trivial due to the need for user interaction, it remains feasible in environments where trust boundaries are loosely defined or where administrators may be susceptible to phishing attacks. Successful exploitation leads to unauthorized access allowing modifications to system data, which can undermine the reliability of the operating environment, introduce backdoors through malicious packages, or disrupt service continuity by deleting critical components. This aligns with CWE-20 Improper Input Validation and CWE-862 Missing Authorization in certain contexts where package sources are not rigorously authenticated against trusted repositories.
In terms of threat modeling, this vulnerability maps to the ATT&CK technique T1537 Deploy Cloud Infrastructure or T1195 Supply Chain Compromise if an attacker manages a compromised repository that administrators inadvertently trust. It also relates to T1059 Command and Scripting Interpreter if the installed package executes arbitrary code post-installation. The lack of required privileges for the initial attack vector (PR:N) means any network-accessible entity can attempt exploitation, but the UI:R factor necessitates a victim's action, such as clicking a link or approving an update prompt that has been tampered with.
Mitigation strategies should focus on strict adherence to secure software supply chain practices and enhanced monitoring of package management activities. Organizations running Oracle Solaris 11.4 must apply all available security patches provided by Oracle for the Image Packaging System component immediately. Administrators should enforce the use of signed packages from trusted, verified repositories only, disabling or restricting access to untrusted sources. Implementing strict network segmentation can limit exposure to external threats targeting TLS endpoints associated with package management services. Additionally, deploying intrusion detection systems that monitor for anomalous behavior in package installation processes and alert on unauthorized modifications to system files will provide an additional layer of defense against exploitation attempts that bypass preventive controls. Regular audits of installed packages and their signatures are essential to detect any successful compromise early.