[UPDATE] [mittel] Netty: Mehrere Schwachstellen
Ein Angreifer kann mehrere Schwachstellen in Netty ausnutzen, um Sicherheitsvorkehrungen zu umgehen, um einen Denial of Service Angriff durchzuführen, und um Informationen offenzulegen.
CSIRTS triage
- What
- Multiple vulnerabilities enable security bypass, denial of service, and information disclosure in Netty.
- Who is affected
- All deployments of affected Netty versions are exposed to remote attacks.
- Urgency
- Medium severity; no active exploitation reported but multiple attack vectors present.
- Action
- Identify and update to patched Netty version; review security posture for any bypassed measures.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2712
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-2026-599020.37% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 30% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-599030.24% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 16% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-59902 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-59903 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- mediumGHSA-8c42-7qj2-3j46: Netty Vulnerable to Cache Poisoning and Information Disclosure via CORS Vary Header Overw…ghsa
- mediumCVE-2026-59903: Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Final a…nvd
- highCVE-2026-59902: Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Final a…nvd
- highGHSA-2qj4-mmr9-4v2f: Netty: Memory Exhaustion in SctpMessageCompletionHandlerghsa
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.
- medium[UPDATE] [mittel] Netty: Mehrere Schwachstellencert-bund · 2026-09-14
- medium[UPDATE] [mittel] Apache Cassandra (Netty): Schwachstelle ermöglicht Denial of Servicecert-bund · 2026-09-14
- high[UPDATE] [hoch] Netty: Mehrere Schwachstellencert-bund · 2026-09-14
- high[UPDATE] [hoch] Netty: Mehrere Schwachstellencert-bund · 2026-09-11
- medium[UPDATE] [mittel] Netty: Mehrere Schwachstellencert-bund · 2026-09-11
- high[UPDATE] [hoch] Netty: Mehrere Schwachstellencert-bund · 2026-09-11
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