CVE-2026-2549
Published: 16 February 2026
Summary
CVE-2026-2549 is a high-severity Incorrect Privilege Assignment (CWE-266) vulnerability. Its CVSS base score is 7.3 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 18.8th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
Threat & Defense at a Glance
Threat & Defense Details
Likely Mitigating ControlsAI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
The access control policy and procedures directly mandate and enforce proper access control mechanisms across the organization.
Supervision and review of access control activities directly detects and remediates improper access configurations or usages.
Defining account types, requiring approvals for creation, specifying authorizations, monitoring usage, and reviewing accounts directly prevents improper access control by ensuring only authorized accounts exist and are used.
The control requires explicit definition of separated access authorizations, making incorrect privilege assignments that bundle conflicting duties harder to implement.
Ensures privileges are assigned only as necessary rather than incorrectly over-granted.
Device lock enforces restricted access until re-authentication, directly reducing unauthorized use of active sessions.
Explicitly identifying and documenting actions permitted without identification or authentication enforces proper access control boundaries by defining justified exceptions.
By automatically labeling outputs with security attributes, the control supports attribute-based enforcement and reduces exploitability of improper access control weaknesses.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Improper access control (CWE-284/266) in a network-exposed Java web controller allows unauthenticated remote manipulation with no user interaction, directly matching exploitation of public-facing applications.
NVD Description
A vulnerability has been found in zhanghuanhao LibrarySystem 图书馆管理系统 up to 1.1.1. This impacts an unknown function of the file BookController.java. The manipulation leads to improper access controls. The attack is possible to be carried out remotely. The exploit has…
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been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet.
Deeper analysisAI
CVE-2026-2549 is a vulnerability in zhanghuanhao LibrarySystem 图书馆管理系统 versions up to 1.1.1. It stems from improper access controls in an unknown function of the BookController.java file, classified under CWEs 266 (Incorrect Privilege Assignment) and 284 (Improper Access Control). The issue was published on 2026-02-16 and carries a CVSS v3.1 base score of 7.3 (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L), indicating high severity due to its network-accessible nature.
The vulnerability enables remote exploitation without authentication, privileges, or user interaction, allowing attackers to manipulate the affected function over the network with low complexity. Successful attacks can result in low impacts to confidentiality, integrity, and availability, potentially enabling unauthorized access or modifications within the library management system.
Advisories from VulDB and the project's GitHub repository note that the issue was reported early via issue #32, but the maintainers have not responded or issued patches. The exploit has been publicly disclosed and may be actively used, with details available in the referenced GitHub issues and VulDB entries (ctiid.346158, id.346158).
Notable context includes the public availability of the exploit, increasing the risk for unpatched deployments of this open-source library management system.
Details
- CWE(s)