CVE-2026-45843: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-58qm-9wwf-x958
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CVSS 8.2
CWE-126
Published
Advisory Summary

CVE-2026-45843 is a HIGH (CVSS 8.2) security vulnerability vulnerability (CWE-126: Buffer Over-read) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations after the targeted buffer.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-45843 at a Glance

CVE Identifier CVE-2026-45843
GHSA Identifier GHSA-58qm-9wwf-x958
Severity HIGH
CVSS v3.1 Base Score 8.2
CWE Classification CWE-126: Buffer Over-read
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 8.2

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:L/A:N).

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 Low (I:L)
Availability None (A:N)

How to Fix CVE-2026-45843

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-2026-45843, 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-126: Buffer Over-read, where the product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations after the targeted buffer. 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: slip: bound decode() reads against the compressed packet length slhc_uncompress() parses a VJ-compressed TCP header by advancing a pointer through the packet via decode() and pull16(). Neither helper bounds-checks against isize, and decode() masks its return with & 0xffff so it can never return the -1 that callers test for -- those error paths are dead code. A short compressed frame whose change byte requests optional fields lets decode() read past the end of the packet. The over-read bytes are folded into the cached cstate and reflected into subsequent reconstructed packets. Make decode() and pull16() take the packet end pointer and return -1 when exhausted. Add a bounds check before the TCP-checksum read. The existing == -1 tests now do what they were always meant to.

References

NVD — CVE-2026-45843 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-45843
cert-portal.siemens.com/productcert/html/ss... WEB
https://cert-portal.siemens.com/productcert/html/ssa-784472.html
git.kernel.org/stable/c/0511ecb00e... WEB
https://git.kernel.org/stable/c/0511ecb00e61bf28e2fec4bb41fcce385c3a3b2d
git.kernel.org/stable/c/335957df4e... WEB
https://git.kernel.org/stable/c/335957df4ed60f02a2ec0432fbedbf0cc7241d8b
git.kernel.org/stable/c/37537e42e6... WEB
https://git.kernel.org/stable/c/37537e42e6df387398bee85cb85070cc80bb1e10
git.kernel.org/stable/c/4c1367a2d7... WEB
https://git.kernel.org/stable/c/4c1367a2d7aad643a6f87c6931b13cc1a25e8ca7
git.kernel.org/stable/c/4cefe32639... WEB
https://git.kernel.org/stable/c/4cefe32639933d652614b0bd50f818f9af4af78f
git.kernel.org/stable/c/6268f01ae9... WEB
https://git.kernel.org/stable/c/6268f01ae989013671b526c883e92655342c6f6f
git.kernel.org/stable/c/9aafba2f49... WEB
https://git.kernel.org/stable/c/9aafba2f49e1fcccc2018816f5836a609c925879
git.kernel.org/stable/c/d42bec6e4f... WEB
https://git.kernel.org/stable/c/d42bec6e4f6d6d658be365539400b3314b76b2a7

Frequently Asked Questions

What is CVE-2026-45843?
CVE-2026-45843 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-126: Buffer Over-read.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-45843?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-45843?
CVE-2026-45843 has a CVSS v3.1 base score of 8.2 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N.
What CWE is associated with CVE-2026-45843?
CVE-2026-45843 is classified under CWE-126: Buffer Over-read (The product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations after the targeted buffer.).
How can I check Maven dependencies for CVE-2026-45843?
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-58qm-9wwf-x958",
  "modified" : "2026-10-15T03:35:55Z",
  "published" : "2026-05-27T12:31:23Z",
  "aliases" : [ "CVE-2026-45843" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nslip: bound decode() reads against the compressed packet length\n\nslhc_uncompress() parses a VJ-compressed TCP header by advancing a\npointer through the packet via decode() and pull16(). Neither helper\nbounds-checks against isize, and decode() masks its return with\n& 0xffff so it can never return the -1 that callers test for -- those\nerror paths are dead code.\n\nA short compressed frame whose change byte requests optional fields\nlets decode() read past the end of the packet. The over-read bytes\nare folded into the cached cstate and reflected into subsequent\nreconstructed packets.\n\nMake decode() and pull16() take the packet end pointer and return -1\nwhen exhausted. Add a bounds check before the TCP-checksum read.\nThe existing == -1 tests now do what they were always meant to.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N"
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  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
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    "url" : "https://cert-portal.siemens.com/productcert/html/ssa-784472.html"
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    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/0511ecb00e61bf28e2fec4bb41fcce385c3a3b2d"
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    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/335957df4ed60f02a2ec0432fbedbf0cc7241d8b"
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    "url" : "https://git.kernel.org/stable/c/d42bec6e4f6d6d658be365539400b3314b76b2a7"
  } ],
  "database_specific" : {
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    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-05-27T11:16:23Z"
  }
}