CVE-2026-86671: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-c4vh-c3rq-3rgr
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CWE-73
Published
Advisory Summary

CVE-2026-86671 is a HIGH security vulnerability vulnerability (CWE-73: External Control of File Name or Path) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product allows user input to control or influence paths or file names that are used in filesystem operations.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-86671 at a Glance

CVE Identifier CVE-2026-86671
GHSA Identifier GHSA-c4vh-c3rq-3rgr
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-73: External Control of File Name or Path
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-86671

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-2026-86671, 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-73: External Control of File Name or Path, where the product allows user input to control or influence paths or file names that are used in filesystem operations. 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

In Eclipse Che versions 7.29.0 and later, the GET `/api/scm/resolve` and `POST /api/factory/resolver` endpoints pass an attacker-controlled URL to `URLFetcher.fetch()`, which calls `new URL(url).openConnection()` with no scheme or host allow-list and returns the response body to the caller. Any authenticated Che user can read arbitrary local files via the file:// scheme (including the pod's Kubernetes service-account token at `file:///var/run/secrets/kubernetes.io/serviceaccount/token`), reach internal HTTP services and cloud instance metadata endpoints (169.254.169.254), and have their stored SCM personal access token attached as an `Authorization` header to a host of their choosing. The same credential-forwarding behavior also fires when a victim opens a workspace from a malicious devfile whose `parent.uri` points to an attacker-controlled server, enabling exfiltration of the victim's SCM PAT without direct API access. No fix is available.

References

NVD — CVE-2026-86671 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-86671
Software Security Information SECURITY
https://gitlab.eclipse.org/security/cve-assignment/-/work_items/278
Software Security Information SECURITY
https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/620
redhat.atlassian.net/browse/crw-11956 WEB
https://redhat.atlassian.net/browse/CRW-11956

Frequently Asked Questions

What is CVE-2026-86671?
CVE-2026-86671 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-73: External Control of File Name or Path.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-86671?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-86671?
CVE-2026-86671 is classified under CWE-73: External Control of File Name or Path (The product allows user input to control or influence paths or file names that are used in filesystem operations.).
How can I check Maven dependencies for CVE-2026-86671?
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-c4vh-c3rq-3rgr",
  "modified" : "2026-10-05T18:34:22Z",
  "published" : "2026-10-05T18:34:22Z",
  "aliases" : [ "CVE-2026-86671" ],
  "details" : "In Eclipse Che versions 7.29.0 and later, the GET `/api/scm/resolve` and `POST /api/factory/resolver` endpoints pass an attacker-controlled URL to `URLFetcher.fetch()`, which calls `new URL(url).openConnection()` with no scheme or host allow-list and returns the response body to the caller. Any authenticated Che user can read arbitrary local files via the file:// scheme (including the pod's Kubernetes service-account token at `file:///var/run/secrets/kubernetes.io/serviceaccount/token`), reach internal HTTP services and cloud instance metadata endpoints (169.254.169.254), and have their stored SCM personal access token attached as an `Authorization` header to a host of their choosing. The same credential-forwarding behavior also fires when a victim opens a workspace from a malicious devfile whose `parent.uri` points to an attacker-controlled server, enabling exfiltration of the victim's SCM PAT without direct API access. No fix is available.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/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-2026-86671"
  }, {
    "type" : "WEB",
    "url" : "https://gitlab.eclipse.org/security/cve-assignment/-/work_items/278"
  }, {
    "type" : "WEB",
    "url" : "https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/620"
  }, {
    "type" : "WEB",
    "url" : "https://redhat.atlassian.net/browse/CRW-11956"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-73" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-10-05T17:17:16Z"
  }
}