[NEW] [medium] Netty: Multiple vulnerabilities

mediumCVE-2026-56746 CVE-2026-59919

An attacker can exploit multiple vulnerabilities in Netty to bypass security measures and manipulate data.

CSIRTS triage

vendor: Netty product: NettyOther

What: Multiple vulnerabilities allow an attacker to bypass security measures and manipulate data.
Who is affected: Deployments of Netty are affected.
Urgency: Remediation is medium urgency as exploitation is not currently reported but vulnerabilities exist.
Action: Monitor for updates and apply patches when available.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity: medium
Published: 2026-07-30
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2425

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-567460.43% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 35% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-56746	coverage & exploitation status	NVD · CVE.org
CVE-2026-59919	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Netty

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

highGHSA-93wv-jw9v-4972: Netty: HTTP/2 decompression leaks ByteBuf reference count when the decompressor channel i…ghsa · 2026-07-31
high[NEW] [high] Netty: Multiple vulnerabilitiescert-bund · 2026-07-30
high[UPDATE] [high] Netty: Multiple vulnerabilitiescert-bund · 2026-07-30
unknownCVE-2026-59898: Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.13…nvd · 2026-07-29
mediumCVE-2026-59920: Netty is an asynchronous, event-driven network application framework. In versions prior to 4.1…nvd · 2026-07-29
mediumCVE-2026-59919: Netty is an asynchronous, event-driven network application framework. In versions prior to 4.1…nvd · 2026-07-29