CVE-2026-90895: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-rx79-g748-j44m
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CWE-150
Published
Advisory Summary

CVE-2026-90895 is a HIGH security vulnerability vulnerability (CWE-150: Improper Neutralization of Escape, Meta, or Control Sequences) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could be interpreted as escape, meta, or control character sequences when they are sent to a downstream component.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-90895 at a Glance

CVE Identifier CVE-2026-90895
GHSA Identifier GHSA-rx79-g748-j44m
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-150: Improper Neutralization of Escape, Meta, or Control Sequences
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-90895

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-2026-90895, 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-150: Improper Neutralization of Escape, Meta, or Control Sequences, where the product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could be interpreted as escape, meta, or control character sequences when they are sent to a downstream component. 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’s interactive CLI shell implement access control independently from the normal web application, causing several authorization inconsistencies. The patch shows that CLI access could differ from the web application in multiple security-sensitive areas:  - feed listings did not enforce the same lookup_visible restrictions for non-host-organisation users;  - feed detail access did not enforce the same host-organisation/site-admin authorization as FeedsController::view();  - Feed.headers, which can contain HTTP authorization credentials, could be exposed instead of being hidden or masked;  - server synchronization authkey values were not explicitly hidden from CLI detail output;  - sharing-group detail access did not consistently use SharingGroup::checkIfAuthorised();  - the use command could establish context for a record without first proving that the user was authorized to view that record The commit additionally hardens pagination and terminal rendering, including neutralization of terminal control sequences found in database-backed values. Those are important hardening changes, but the main vulnerability is the CLI authorization/data-disclosure mismatch. Version affected: ≤2.5.45

References

NVD — CVE-2026-90895 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-90895
Security Fix Commit FIX COMMIT
https://github.com/MISP/MISP/commit/cd9f548ed

Frequently Asked Questions

What is CVE-2026-90895?
CVE-2026-90895 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-150: Improper Neutralization of Escape, Meta, or Control Sequences.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-90895?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-90895?
CVE-2026-90895 is classified under CWE-150: Improper Neutralization of Escape, Meta, or Control Sequences (The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could be interpreted as escape, meta, or control character sequences when they are sent to a downstream component.).
How can I check Maven dependencies for CVE-2026-90895?
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-rx79-g748-j44m",
  "modified" : "2026-09-14T12:31:37Z",
  "published" : "2026-09-14T12:31:37Z",
  "aliases" : [ "CVE-2026-90895" ],
  "details" : "Affected versions of MISP’s interactive CLI shell implement access control independently from the normal web application, causing several authorization inconsistencies.\n\n\nThe patch shows that CLI access could differ from the web application in multiple security-sensitive areas:\n\n - feed listings did not enforce the same lookup_visible restrictions for non-host-organisation users;\n - feed detail access did not enforce the same host-organisation/site-admin authorization as FeedsController::view();\n - Feed.headers, which can contain HTTP authorization credentials, could be exposed instead of being hidden or masked;\n - server synchronization authkey values were not explicitly hidden from CLI detail output;\n - sharing-group detail access did not consistently use SharingGroup::checkIfAuthorised();\n - the use command could establish context for a record without first proving that the user was authorized to view that record\n\n\nThe commit additionally hardens pagination and terminal rendering, including neutralization of terminal control sequences found in database-backed values. Those are important hardening changes, but the main vulnerability is the CLI authorization/data-disclosure mismatch.\n\nVersion affected: ≤2.5.45",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/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-2026-90895"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/MISP/MISP/commit/cd9f548ed"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-150" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-14T10:17:06Z"
  }
}