CVE-2026-54211: Software Security Vulnerability Vulnerability

CRITICAL
Advisory Identifier: GHSA-m98g-956p-4hxc
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CWE-787
Published
Advisory Summary

CVE-2026-54211 is a CRITICAL security vulnerability vulnerability (CWE-787: Out-of-bounds Write) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product writes data past the end, or before the beginning, of the intended buffer.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-54211 at a Glance

CVE Identifier CVE-2026-54211
GHSA Identifier GHSA-m98g-956p-4hxc
Severity CRITICAL
CVSS v3.1 Base Score N/A
CWE Classification CWE-787: Out-of-bounds Write
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-54211

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-2026-54211, 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-787: Out-of-bounds Write, where the product writes data past the end, or before the beginning, of the intended 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

Tobit Laboratories AG TeamDavid's Webbox application’s endpoint “//serverClient_close.html” is vulnerable to a buffer overflow vulnerability in multiple form data parameters. By submitting excessively long values in these parameters, an authenticated attacker can trigger a server crash, resulting in denial of service. Depending on the stack state or if a stack canary can be disclosed through another vulnerability, this buffer overflow could potentially be exploited for remote code execution, leading to full compromise of the server. This issue affects TeamDavid through Rollout 524.

References

NVD — CVE-2026-54211 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-54211
chayns.net/77892-10814/tapp/76... WEB
https://chayns.net/77892-10814/tapp/763210?postId=11454
david.tobit.software/releasenotes WEB
https://david.tobit.software/releasenotes
labs.infoguard.ch/posts/22-cves-in-da... WEB
https://labs.infoguard.ch/posts/22-cves-in-david-a-secure-m365-alternative

Frequently Asked Questions

What is CVE-2026-54211?
CVE-2026-54211 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-787: Out-of-bounds Write.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-54211?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-54211?
CVE-2026-54211 is classified under CWE-787: Out-of-bounds Write (The product writes data past the end, or before the beginning, of the intended buffer.).
How can I check Maven dependencies for CVE-2026-54211?
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-m98g-956p-4hxc",
  "modified" : "2026-09-07T15:33:45Z",
  "published" : "2026-08-07T12:32:00Z",
  "aliases" : [ "CVE-2026-54211" ],
  "details" : "Tobit Laboratories AG TeamDavid's Webbox application’s endpoint “//serverClient_close.html” is vulnerable to a\n buffer overflow vulnerability in multiple form data parameters. By \nsubmitting excessively long values in these parameters, an authenticated\n attacker can trigger a server crash, resulting in denial of service. \nDepending on the stack state or if a stack canary can be disclosed \nthrough another vulnerability, this buffer overflow could potentially be\n exploited for remote code execution, leading to full compromise of the \nserver. This issue affects TeamDavid through Rollout 524.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-54211"
  }, {
    "type" : "WEB",
    "url" : "https://chayns.net/77892-10814/tapp/763210?postId=11454"
  }, {
    "type" : "WEB",
    "url" : "https://david.tobit.software/releasenotes"
  }, {
    "type" : "WEB",
    "url" : "https://labs.infoguard.ch/posts/22-cves-in-david-a-secure-m365-alternative"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-787" ],
    "severity" : "CRITICAL",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-08-07T10:16:58Z"
  }
}