---
title: "CVE-2026-102476: Eclipse Vert.x - Misconfiguration"
description: "Eclipse Vert.x versions 5.0.0 to 5.0.12, 5.1.0 to 5.1.9, and 5.2.0 contain an insecure SSL context caching caused by improper SSL property handling in the Vert.x HTTP client, letting attackers obtain SSL contexts with weaker security properties, exploit requires client to request SSL context."
url: https://panop.io/threat-heartbeat/CVE-2026-102476/
---

# CVE-2026-102476 Eclipse Vert.x - Misconfiguration

Eclipse Vert.x versions 5.0.0 to 5.0.12, 5.1.0 to 5.1.9, and 5.2.0 contain an insecure SSL context caching caused by improper SSL property handling in the Vert.x HTTP client, letting attackers obtain SSL contexts with weaker security properties, exploit requires client to request SSL context.

CVSS base score 9.1 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-102476)

## Details

Type

Misconfiguration

Impact

Man In The Middle

CVSS vector

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/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

Published

14 October 2026

Updated

15 October 2026

## Vendor fix

Update to a version later than 5.2.0 or the latest available version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-102476](https://nvd.nist.gov/vuln/detail/CVE-2026-102476)
- [https://github.com/eclipse-vertx/vert.x/security/advisories/GHSA-2vhw-4xwj-r38v](https://github.com/eclipse-vertx/vert.x/security/advisories/GHSA-2vhw-4xwj-r38v)
- [https://gitlab.eclipse.org/security/cve-assignment/-/work\_items/350](https://gitlab.eclipse.org/security/cve-assignment/-/work_items/350)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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