CVE-2026-91859: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-qx5f-75hg-mf2c
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CWE-223
Published
Advisory Summary

CVE-2026-91859 is a MODERATE security vulnerability vulnerability (CWE-223: Omission of Security-relevant Information) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product does not record or display information that would be important for identifying the source or nature of an attack, or determining if an action is safe.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-91859 at a Glance

CVE Identifier CVE-2026-91859
GHSA Identifier GHSA-qx5f-75hg-mf2c
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-223: Omission of Security-relevant Information
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-91859

To remediate this vulnerability, upgrade all affected Software dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-91859, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

Analyze the terminal output to locate any version of Software in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The mvn dependency:tree command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-223: Omission of Security-relevant Information, where the product does not record or display information that would be important for identifying the source or nature of an attack, or determining if an action is safe. In Software, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

Affected versions of MISP can record incorrect access-log data for requests that terminate in an exception. Because CakeErrorController extends AppController, exception rendering runs the application startup path a second time. As a result, __accessMonitor() calls AccessLog::logRequest() twice for one HTTP request. The second deferred writer measures the error-controller execution instead of the original request and can overwrite the row created by the first pass. The corrupted fields include request duration, SQL query count, memory usage, and potentially the recorded query log. The bug was masked because the same model instance retained the ID of the first saved row, causing the later save to issue an UPDATE rather than insert an obvious duplicate row. Version affected: ≤2.5.45

References

NVD — CVE-2026-91859 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-91859
Security Fix Commit FIX COMMIT
https://github.com/MISP/MISP/commit/0dae5c072

Frequently Asked Questions

What is CVE-2026-91859?
CVE-2026-91859 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-223: Omission of Security-relevant Information.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-91859?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-91859?
CVE-2026-91859 is classified under CWE-223: Omission of Security-relevant Information (The product does not record or display information that would be important for identifying the source or nature of an attack, or determining if an action is safe.).
How can I check Maven dependencies for CVE-2026-91859?
Run the dependency tree command: 'mvn dependency:tree'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-qx5f-75hg-mf2c",
  "modified" : "2026-09-15T12:31:46Z",
  "published" : "2026-09-15T12:31:46Z",
  "aliases" : [ "CVE-2026-91859" ],
  "details" : "Affected versions of MISP can record incorrect access-log data for requests that terminate in an exception.\n\n\nBecause CakeErrorController extends AppController, exception rendering runs the application startup path a second time. As a result, __accessMonitor() calls AccessLog::logRequest() twice for one HTTP request. The second deferred writer measures the error-controller execution instead of the original request and can overwrite the row created by the first pass. The corrupted fields include request duration, SQL query count, memory usage, and potentially the recorded query log.\n\n\nThe bug was masked because the same model instance retained the ID of the first saved row, causing the later save to issue an UPDATE rather than insert an obvious duplicate row.\n\nVersion affected: ≤2.5.45",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-91859"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/MISP/MISP/commit/0dae5c072"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-223" ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-15T10:17:06Z"
  }
}