CVE-2026-8594: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-xfcf-wwr2-w555
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CVSS 6.2
CWE-405
Published
Advisory Summary

CVE-2026-8594 is a MODERATE (CVSS 6.2) security vulnerability vulnerability (CWE-405: Asymmetric Resource Consumption (Amplification)) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product does not properly control situations in which an adversary can cause the product to consume or produce excessive resources without requiring the adversary to invest equivalent work or otherwise prove authorization, i.e., the adversary's influence is "asymmetric.". Remediation is available in the latest vendor maintenance releases.

CVE-2026-8594 at a Glance

CVE Identifier CVE-2026-8594
GHSA Identifier GHSA-xfcf-wwr2-w555
Severity MODERATE
CVSS v3.1 Base Score 6.2
CWE Classification CWE-405: Asymmetric Resource Consumption (Amplification)
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 6.2

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

Attack Vector Local (AV:L)
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-2026-8594

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-2026-8594, 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-405: Asymmetric Resource Consumption (Amplification), where the product does not properly control situations in which an adversary can cause the product to consume or produce excessive resources without requiring the adversary to invest equivalent work or otherwise prove authorization, i.e., the adversary's influence is "asymmetric.". 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

Text::LineFold versions through 2019.001 for Perl duplicate the output based on the number of special break characters. Text::LineFold splits the input string by specific line break characters (such as VT, FF and others) into segments, but applies the break function to the entire string, not just the segment. A side effect of this is that the full input can be duplicated for each segment. Besides being incorrect, this can lead to unexpected resource consumption and possible denial of service. Note that Text::LineFold is part of the Unicode-LineBreak distribution, which may have a higher version number than the module.

References

NVD — CVE-2026-8594 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-8594
Software Source Repository REPOSITORY
https://github.com/hatukanezumi/Unicode-LineBreak/pull/6
metacpan.org/release/nezumi/unic... WEB
https://metacpan.org/release/NEZUMI/Unicode-LineBreak-2019.001/source/lib/Text/LineFold.pm#L407-415
Software Security Information SECURITY
https://security.metacpan.org/patches/U/Unicode-LineBreak/2019.001/CVE-2026-8594-r1.patch
Software Security Information SECURITY
http://www.openwall.com/lists/oss-security/2026/05/30/6

Frequently Asked Questions

What is CVE-2026-8594?
CVE-2026-8594 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-405: Asymmetric Resource Consumption (Amplification).
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-8594?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-8594?
CVE-2026-8594 has a CVSS v3.1 base score of 6.2 (MODERATE) with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2026-8594?
CVE-2026-8594 is classified under CWE-405: Asymmetric Resource Consumption (Amplification) (The product does not properly control situations in which an adversary can cause the product to consume or produce excessive resources without requiring the adversary to invest equivalent work or otherwise prove authorization, i.e., the adversary's influence is "asymmetric.").
How can I check Maven dependencies for CVE-2026-8594?
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-xfcf-wwr2-w555",
  "modified" : "2026-06-01T18:31:47Z",
  "published" : "2026-05-30T18:31:00Z",
  "aliases" : [ "CVE-2026-8594" ],
  "details" : "Text::LineFold versions through 2019.001 for Perl duplicate the output based on the number of special break characters.\n\nText::LineFold splits the input string by specific line break characters (such as VT, FF and others) into segments, but applies the break function to the entire string, not just the segment.\n\nA side effect of this is that the full input can be duplicated for each segment.  Besides being incorrect, this can lead to unexpected resource consumption and possible denial of service.\n\nNote that Text::LineFold is part of the Unicode-LineBreak distribution, which may have a higher version number than the module.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-8594"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/hatukanezumi/Unicode-LineBreak/pull/6"
  }, {
    "type" : "WEB",
    "url" : "https://metacpan.org/release/NEZUMI/Unicode-LineBreak-2019.001/source/lib/Text/LineFold.pm#L407-415"
  }, {
    "type" : "WEB",
    "url" : "https://security.metacpan.org/patches/U/Unicode-LineBreak/2019.001/CVE-2026-8594-r1.patch"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2026/05/30/6"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-405" ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-05-30T16:17:05Z"
  }
}