CVE-2026-102477: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-3f8m-f8fw-9m74
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CWE-409
Published
Advisory Summary

CVE-2026-102477 is a HIGH security vulnerability vulnerability (CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product does not handle or incorrectly handles a compressed input with a very high compression ratio that produces a large output.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-102477 at a Glance

CVE Identifier CVE-2026-102477
GHSA Identifier GHSA-3f8m-f8fw-9m74
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-102477

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-2026-102477, 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-409: Improper Handling of Highly Compressed Data (Data Amplification), where the product does not handle or incorrectly handles a compressed input with a very high compression ratio that produces a large output. 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 Eclipse Vert.x versions [4.0.0, 4.5.34] or [5.0.0,5.0.12] or [5.1.0,5.1.9] or [5.2.0, 5.2.0], a gRPC endpoint does have a configurable per message maximum size in bytes, however the maximum size applies to the received bytes. When applied to a compressed message, this only applies to the compressed size and not the actual size of the uncompressed content. This can be used to force a gRPC endpoint to allocate more bytes than the value defined by the configuration, making the endpoint vulnerable to compression bomb attacks. The impacted component is io.vertx:vertx-gprc-server.

References

GitHub Advisory / Wiki ADVISORY
https://github.com/eclipse-vertx/vertx-grpc/security/advisories/GHSA-4wvq-75mw-q6cg
NVD — CVE-2026-102477 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-102477
Software Security Information SECURITY
https://gitlab.eclipse.org/security/cve-assignment/-/work_items/349

Frequently Asked Questions

What is CVE-2026-102477?
CVE-2026-102477 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-409: Improper Handling of Highly Compressed Data (Data Amplification).
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-102477?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-102477?
CVE-2026-102477 is classified under CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) (The product does not handle or incorrectly handles a compressed input with a very high compression ratio that produces a large output.).
How can I check Maven dependencies for CVE-2026-102477?
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-3f8m-f8fw-9m74",
  "modified" : "2026-10-15T09:30:34Z",
  "published" : "2026-10-15T09:30:34Z",
  "aliases" : [ "CVE-2026-102477" ],
  "details" : "In Eclipse Vert.x versions [4.0.0, 4.5.34] or [5.0.0,5.0.12] or [5.1.0,5.1.9] or [5.2.0, 5.2.0], a gRPC endpoint does have a configurable per message maximum size in bytes, however the maximum size applies to the received bytes. When applied to a compressed message, this only applies to the compressed size and not the actual size of the uncompressed content. This can be used to force a gRPC endpoint to allocate more bytes than the value defined by the configuration, making the endpoint vulnerable to compression bomb attacks.\n\n\n\nThe impacted component is io.vertx:vertx-gprc-server.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/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" : "WEB",
    "url" : "https://github.com/eclipse-vertx/vertx-grpc/security/advisories/GHSA-4wvq-75mw-q6cg"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-102477"
  }, {
    "type" : "WEB",
    "url" : "https://gitlab.eclipse.org/security/cve-assignment/-/work_items/349"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-409" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-10-15T09:17:15Z"
  }
}