CVE-2026-63277: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-5jx8-5g92-5w59
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CWE-829
Published
Advisory Summary

CVE-2026-63277 is a HIGH security vulnerability vulnerability (CWE-829: Inclusion of Functionality from Untrusted Control Sphere) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product imports, requires, or includes executable functionality (such as a library) from a source that is outside of the intended control sphere.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-63277 at a Glance

CVE Identifier CVE-2026-63277
GHSA Identifier GHSA-5jx8-5g92-5w59
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-829: Inclusion of Functionality from Untrusted Control Sphere
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-63277

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-2026-63277, 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-829: Inclusion of Functionality from Untrusted Control Sphere, where the product imports, requires, or includes executable functionality (such as a library) from a source that is outside of the intended control sphere. 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

LibreOffice Calc can link a cell range to an external data source, and the link is saved in the document. A document could name a Java database driver for such a link to be loaded from a remote location, so opening the document could run Java code from that location. In fixed versions an entry in a Java class path has to be a file URL.

References

NVD — CVE-2026-63277 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-63277
Software Security Information SECURITY
https://www.libreoffice.org/about-us/security/advisories/cve-2026-63277

Frequently Asked Questions

What is CVE-2026-63277?
CVE-2026-63277 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-829: Inclusion of Functionality from Untrusted Control Sphere.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-63277?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-63277?
CVE-2026-63277 is classified under CWE-829: Inclusion of Functionality from Untrusted Control Sphere (The product imports, requires, or includes executable functionality (such as a library) from a source that is outside of the intended control sphere.).
How can I check Maven dependencies for CVE-2026-63277?
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-5jx8-5g92-5w59",
  "modified" : "2026-10-05T12:31:28Z",
  "published" : "2026-10-05T12:31:28Z",
  "aliases" : [ "CVE-2026-63277" ],
  "details" : "LibreOffice Calc can link a cell range to an external data source, and the link is saved in the document. A document could name a Java database driver for such a link to be loaded from a remote location, so opening the document could run Java code from that location. In fixed versions an entry in a Java class path has to be a file URL.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/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-2026-63277"
  }, {
    "type" : "WEB",
    "url" : "https://www.libreoffice.org/about-us/security/advisories/cve-2026-63277"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-829" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-10-05T12:17:11Z"
  }
}