CVE-2026-45812: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-m9xh-wpcw-qvx9
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CVSS 6.5
CWE-131
Published
Advisory Summary

CVE-2026-45812 is a MODERATE (CVSS 6.5) security vulnerability vulnerability (CWE-131: Incorrect Calculation of Buffer Size) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product does not correctly calculate the size to be used when allocating a buffer, which could lead to a buffer overflow.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-45812 at a Glance

CVE Identifier CVE-2026-45812
GHSA Identifier GHSA-m9xh-wpcw-qvx9
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-131: Incorrect Calculation of Buffer Size
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 6.5

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

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

How to Fix CVE-2026-45812

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-2026-45812, 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-131: Incorrect Calculation of Buffer Size, where the product does not correctly calculate the size to be used when allocating a buffer, which could lead to a buffer overflow. 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

Incorrect Calculation of Buffer Size vulnerability in Apache NimBLE when processing Legacy Advertising Report HCI event. When a single HCI advertising report event bundles multiple reports, NimBLE miscalculated the offset to the next report. This can cause the host to read past the end of the buffer and deliver a GAP event with bogus data to the application. Severity is low: NimBLE's own controller never batches multiple reports into one event, so this only matters when NimBLE's host is paired with a third-party controller that does. This issue affects Apache NimBLE: through 1.9.0. Users are recommended to upgrade to version 1.10.0, which fixes the issue.

References

NVD — CVE-2026-45812 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-45812
Security Fix Commit FIX COMMIT
https://github.com/apache/mynewt-nimble/commit/605c7585408bc3674818eeb7b6f478a8aefe9746
lists.apache.org/thread/rll5m1ly2vg8... WEB
https://lists.apache.org/thread/rll5m1ly2vg8jr76lp5ohrtspr5vlofy
Software Security Information SECURITY
http://www.openwall.com/lists/oss-security/2026/07/24/12

Frequently Asked Questions

What is CVE-2026-45812?
CVE-2026-45812 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-131: Incorrect Calculation of Buffer Size.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-45812?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-45812?
CVE-2026-45812 has a CVSS v3.1 base score of 6.5 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2026-45812?
CVE-2026-45812 is classified under CWE-131: Incorrect Calculation of Buffer Size (The product does not correctly calculate the size to be used when allocating a buffer, which could lead to a buffer overflow.).
How can I check Maven dependencies for CVE-2026-45812?
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-m9xh-wpcw-qvx9",
  "modified" : "2026-07-24T21:32:21Z",
  "published" : "2026-07-24T15:33:01Z",
  "aliases" : [ "CVE-2026-45812" ],
  "details" : "Incorrect Calculation of Buffer Size vulnerability in Apache NimBLE when processing Legacy Advertising Report HCI event.\n\nWhen a single HCI advertising report event bundles multiple reports, NimBLE miscalculated the offset to the next report. This can cause the host to read past the end of the buffer and deliver a GAP event with bogus data to the application.\n\nSeverity is low: NimBLE's own controller never batches multiple reports into one event, so this only matters when NimBLE's host is paired with a third-party controller that does.\n\nThis issue affects Apache NimBLE: through 1.9.0.\n\nUsers are recommended to upgrade to version 1.10.0, which fixes the issue.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-45812"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/mynewt-nimble/commit/605c7585408bc3674818eeb7b6f478a8aefe9746"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread/rll5m1ly2vg8jr76lp5ohrtspr5vlofy"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2026/07/24/12"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-131" ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-07-24T13:18:23Z"
  }
}