CVE-2026-26102 is a vulnerability identified in Owl opds version 2.2.0.4, classified under CWE-732, which pertains to incorrect permission assignment for critical resources. This weakness arises when the software improperly sets access controls on sensitive files or directories, allowing an attacker with limited privileges to perform unauthorized file manipulations through specially crafted network requests. The vulnerability does not require user interaction and has a low attack complexity, meaning exploitation can be achieved relatively easily by an attacker who has some level of access to the network or system. The CVSS 4.0 base score of 8.5 reflects the high impact on confidentiality, integrity, and availability, as successful exploitation could lead to unauthorized disclosure, modification, or deletion of critical files. The vulnerability does not require authentication beyond limited privileges, increasing its risk profile. Although no public exploits are currently known, the lack of patches or mitigations increases the urgency for organizations to address this issue. The flaw affects Owl opds 2.2.0.4, a product used for managing and distributing digital content, which may be deployed in various enterprise and infrastructure environments. The incorrect permission assignment could be exploited remotely over the network, making it a significant threat vector for organizations relying on this software.

The impact of CVE-2026-26102 is substantial for organizations using Owl opds 2.2.0.4. Exploitation can lead to unauthorized file manipulation, potentially resulting in data breaches, loss of data integrity, or service disruption. Confidential information stored or managed by the affected software could be exposed or altered, undermining trust and compliance with data protection regulations. Availability could also be compromised if critical files are deleted or corrupted, leading to downtime and operational impact. Since the vulnerability can be exploited remotely with limited privileges and no user interaction, attackers could leverage it to escalate privileges or move laterally within a network. This poses a risk to organizations in sectors such as publishing, digital libraries, or any enterprise relying on Owl opds for content distribution. The absence of known exploits in the wild currently limits immediate widespread impact, but the high severity score and ease of exploitation mean that threat actors may develop exploits rapidly once the vulnerability becomes widely known.

To mitigate CVE-2026-26102, organizations should first verify if they are running Owl opds version 2.2.0.4 and prioritize upgrading to a patched version once available. In the absence of an official patch, administrators should audit and correct permission settings on all critical files and directories managed by Owl opds to ensure least privilege principles are enforced. Network-level controls such as segmentation and firewall rules should restrict access to Owl opds services to trusted hosts only. Implementing strict monitoring and logging of network requests targeting Owl opds can help detect attempts to exploit this vulnerability. Additionally, employing intrusion detection/prevention systems (IDS/IPS) with custom signatures for suspicious file manipulation requests can provide early warning. Regularly reviewing user privileges and limiting the number of accounts with access to Owl opds resources reduces the attack surface. Finally, organizations should prepare incident response plans specific to file integrity breaches to quickly contain and remediate any exploitation attempts.