CVE-2026-44893

Description

Netty: HAProxy SSL TLV parsing leaks retained slice on invalid TLV length

Overview

State

—

Assigner (CNA)

—

CVSS severity

high

CVSS score

7.5 / 10

CVSS vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Effective score

7.5 / 10 HIGH source: CNA overview

CWE(s)

—

Reserved

—

Published

—

Last updated

—

Source

https://www.tenable.com/cve/CVE-2026-44893

Linked Threat

CVE-2026-44893 — CVE-2026-44893

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published

2026-06-12 15:16:26 UTC

NVD last modified

2026-07-30 12:18:47 UTC

NVD CVSS v3.1

7.5 / 10 HIGH source: security-advisories@github.com

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitability subscore

3.9 / 10

Impact subscore

3.6 / 10

EPSS score

0.0062 (probability of exploitation in next 30 days)

EPSS percentile

46.13% vs all CVEs — higher = more likely to be exploited, as of 2026-08-01

NVD-assigned CWE(s): CWE-703, CWE-805 (differs from the CNA list above)

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID

EUVD-2026-36432

Assigner

GitHub_M

Published

Jun 12, 2026, 2:00:25 PM

Updated

Jul 30, 2026, 12:05:05 PM

EUVD base score (CVSS 3.1)

7.5 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EUVD-reported EPSS

0.6200

Vendors

netty

Products

netty (4.2.0.Final, < 4.2.15.Final)

netty (< 4.1.135.Final)

Aliases

GHSA-cc37-9q2j-3hfv

ENISA description: Netty is a network application framework for development of protocol servers and clients. In netty-codec-haproxy prior to versions 4.1.135.Final and 4.2.15.Final, when decoding a PP2_TYPE_SSL TLV, HAProxyMessage.readNextTLV() first calls `header.retainedSlice(header.readerIndex(), length)` and only then reads the 1-byte client field and 4-byte verify field. If the attacker sets the TLV length below 5, the subsequent readByte/readInt throws IndexOutOfBoundsException. HAProxyMessageDecoder only catches HAProxyProtocolException around this call, so the IOOBE propagates and the retained slice on the pooled cumulation buffer is never released. Versions 4.1.135.Final and 4.2.15.Final patch the issue.

Vendor references (0)

References embedded in the original CVE record by the assigning CNA.

None in the CVE record.

Web references (2)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

• https://nvd.nist.gov/vuln/detail/CVE-2026-44893 tenable:nvd.nist.gov
• https://www.cve.org/CVERecord?id=CVE-2026-44893 tenable:www.cve.org

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

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• Oracle Critical Security Patch Update Advisory - May 2026
  web:www.oracle.com

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