CVE-2026-27137: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-7hfw-r8qc-89v4
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CVSS 7.5
CWE-295
Published
Advisory Summary

CVE-2026-27137 is a HIGH (CVSS 7.5) security vulnerability vulnerability (CWE-295: Improper Certificate Validation) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product does not validate, or incorrectly validates, a certificate.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-27137 at a Glance

CVE Identifier CVE-2026-27137
GHSA Identifier GHSA-7hfw-r8qc-89v4
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-295: Improper Certificate Validation
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2026-27137

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-2026-27137, 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-295: Improper Certificate Validation, where the product does not validate, or incorrectly validates, a certificate. 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

When verifying a certificate chain which contains a certificate containing multiple email address constraints which share common local portions but different domain portions, these constraints will not be properly applied, and only the last constraint will be considered.

References

NVD — CVE-2026-27137 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-27137
Software Security Information SECURITY
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-27137.json
access.redhat.com/errata/rhsa-2026:81... WEB
https://access.redhat.com/errata/RHSA-2026:8151
access.redhat.com/errata/rhsa-2026:72... WEB
https://access.redhat.com/errata/RHSA-2026:7291
access.redhat.com/errata/rhsa-2026:67... WEB
https://access.redhat.com/errata/RHSA-2026:67518
access.redhat.com/errata/rhsa-2026:67... WEB
https://access.redhat.com/errata/RHSA-2026:67517
access.redhat.com/errata/rhsa-2026:67... WEB
https://access.redhat.com/errata/RHSA-2026:67160
access.redhat.com/errata/rhsa-2026:67... WEB
https://access.redhat.com/errata/RHSA-2026:67159
access.redhat.com/errata/rhsa-2026:61... WEB
https://access.redhat.com/errata/RHSA-2026:61253
access.redhat.com/errata/rhsa-2026:57... WEB
https://access.redhat.com/errata/RHSA-2026:57649
access.redhat.com/errata/rhsa-2026:56... WEB
https://access.redhat.com/errata/RHSA-2026:56223
access.redhat.com/errata/rhsa-2026:56... WEB
https://access.redhat.com/errata/RHSA-2026:56143
access.redhat.com/errata/rhsa-2026:55... WEB
https://access.redhat.com/errata/RHSA-2026:5549
access.redhat.com/errata/rhsa-2026:54... WEB
https://access.redhat.com/errata/RHSA-2026:54757
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https://access.redhat.com/errata/RHSA-2026:5110
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https://access.redhat.com/errata/RHSA-2026:49712
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https://access.redhat.com/errata/RHSA-2026:49703
access.redhat.com/errata/rhsa-2026:49... WEB
https://access.redhat.com/errata/RHSA-2026:49702
pkg.go.dev/vuln/go-2026-4599 WEB
https://pkg.go.dev/vuln/GO-2026-4599
groups.google.com/g/golang-announce/c... WEB
https://groups.google.com/g/golang-announce/c/EdhZqrQ98hk
go.dev/issue/77952 WEB
https://go.dev/issue/77952
go.dev/cl/752182 WEB
https://go.dev/cl/752182
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=2445345
Software Security Information SECURITY
https://access.redhat.com/security/cve/CVE-2026-27137
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https://access.redhat.com/errata/RHSA-2026:9872
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https://access.redhat.com/errata/RHSA-2026:9699
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https://access.redhat.com/errata/RHSA-2026:9698
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https://access.redhat.com/errata/RHSA-2026:9697
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https://access.redhat.com/errata/RHSA-2026:9385
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https://access.redhat.com/errata/RHSA-2026:9052
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https://access.redhat.com/errata/RHSA-2026:8842
access.redhat.com/errata/rhsa-2026:83... WEB
https://access.redhat.com/errata/RHSA-2026:8338
access.redhat.com/errata/rhsa-2026:83... WEB
https://access.redhat.com/errata/RHSA-2026:8337
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https://access.redhat.com/errata/RHSA-2026:8167
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https://access.redhat.com/errata/RHSA-2026:28047
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https://access.redhat.com/errata/RHSA-2026:28038
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https://access.redhat.com/errata/RHSA-2026:26585
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https://access.redhat.com/errata/RHSA-2026:22423
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https://access.redhat.com/errata/RHSA-2026:22347

Frequently Asked Questions

What is CVE-2026-27137?
CVE-2026-27137 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-295: Improper Certificate Validation.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-27137?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-27137?
CVE-2026-27137 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2026-27137?
CVE-2026-27137 is classified under CWE-295: Improper Certificate Validation (The product does not validate, or incorrectly validates, a certificate.).
How can I check Maven dependencies for CVE-2026-27137?
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 
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