CVE-2026-64046: Software Security Vulnerability Vulnerability

CRITICAL
Advisory Identifier: GHSA-3mwm-pxvj-5v4x
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CVSS 9.8
CWE-20
Published
Advisory Summary

CVE-2026-64046 is a CRITICAL (CVSS 9.8) security vulnerability vulnerability (CWE-20: Improper Input Validation) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-64046 at a Glance

CVE Identifier CVE-2026-64046
GHSA Identifier GHSA-3mwm-pxvj-5v4x
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-20: Improper Input Validation
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 9.8

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:H/I:H/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 High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2026-64046

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-2026-64046, 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-20: Improper Input Validation, where the product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. 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 the Linux kernel, the following vulnerability has been resolved: net: tls: prevent chain-after-chain in plain text SG Sashiko points out that if end = 0 (start != 0) the current code will create a chain link to content type right after the wrap link: This would create a chain where the wrap link points directly to another chain link. The scatterlist API sg_next iterator does not recursively resolve consecutive chain links. meaning this is illegal input to crypto. The wrapping link is unnecessary if end = 0. end is the entry after the last one used so end = 0 means there's nothing pushed after the wrap: end start i v v v [ ]...[ ][ d ][ d ][ d ][ d ][rsv for wrap] Skip the wrapping in this case. TLS 1.3 can use the "wrapping slot" for it's chaining if end = 0. This avoids the chain-after-chain. Move the wrap chaining before marking END and chaining off content type, that feels like more logical ordering to me, but should not matter from functional perspective.

References

NVD — CVE-2026-64046 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-64046
git.kernel.org/stable/c/410351158d... WEB
https://git.kernel.org/stable/c/410351158dfef2d67fea6603680b3a6013c6ed9d
git.kernel.org/stable/c/49a5faaa47... WEB
https://git.kernel.org/stable/c/49a5faaa471ddcd37b6893970c9916eb836e7c31
git.kernel.org/stable/c/91359966e2... WEB
https://git.kernel.org/stable/c/91359966e247c0244c66d50bbb8e74aefa4321c3
git.kernel.org/stable/c/929b1548e6... WEB
https://git.kernel.org/stable/c/929b1548e63ac72e104c07d8ee8cbbeeba2fa89a
git.kernel.org/stable/c/acdc12b71c... WEB
https://git.kernel.org/stable/c/acdc12b71c9aa4be5dcd2c8062753c6d2033e235
git.kernel.org/stable/c/af855f4c96... WEB
https://git.kernel.org/stable/c/af855f4c966afafef74faf8390c7b86568c0d46d
git.kernel.org/stable/c/b9c015ef1a... WEB
https://git.kernel.org/stable/c/b9c015ef1a7bf1e8dc67f21c6381f36deb2c3a36
git.kernel.org/stable/c/ff26a0e837... WEB
https://git.kernel.org/stable/c/ff26a0e8377dec07e4a7230db7675bed1b9a6d03

Frequently Asked Questions

What is CVE-2026-64046?
CVE-2026-64046 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-20: Improper Input Validation.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-64046?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-64046?
CVE-2026-64046 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-64046?
CVE-2026-64046 is classified under CWE-20: Improper Input Validation (The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.).
How can I check Maven dependencies for CVE-2026-64046?
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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  "id" : "GHSA-3mwm-pxvj-5v4x",
  "modified" : "2026-07-20T15:31:57Z",
  "published" : "2026-07-19T18:31:50Z",
  "aliases" : [ "CVE-2026-64046" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: tls: prevent chain-after-chain in plain text SG\n\nSashiko points out that if end = 0 (start != 0) the current\ncode will create a chain link to content type right after\nthe wrap link:\n\n  This would create a chain where the wrap link points directly\n  to another chain link. The scatterlist API sg_next iterator\n  does not recursively resolve consecutive chain links.\n\nmeaning this is illegal input to crypto.\n\nThe wrapping link is unnecessary if end = 0. end is the entry after\nthe last one used so end = 0 means there's nothing pushed after\nthe wrap:\n\n   end         start            i\n    v            v              v\n  [   ]...[   ][ d ][ d ][ d ][ d ][rsv for wrap]\n\nSkip the wrapping in this case.\n\nTLS 1.3 can use the \"wrapping slot\" for it's chaining if end = 0.\nThis avoids the chain-after-chain.\n\nMove the wrap chaining before marking END and chaining off content\ntype, that feels like more logical ordering to me, but should not\nmatter from functional perspective.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
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    "url" : "https://git.kernel.org/stable/c/ff26a0e8377dec07e4a7230db7675bed1b9a6d03"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-20" ],
    "severity" : "CRITICAL",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-07-19T16:17:44Z"
  }
}