[UPDATE] [medium] Netty: Multiple vulnerabilities

mediumCVE-2026-41417 CVE-2026-42577 CVE-2026-42578 CVE-2026-42579 CVE-2026-42580 CVE-2026-42581

A remote, anonymous attacker can exploit multiple vulnerabilities in Netty to bypass security measures, manipulate data, disclose confidential information, or cause a denial-of-service condition.

CSIRTS triage

vendor: Netty product: Netty Authentication bypass Information disclosure Denial of serviceOther

What: Multiple vulnerabilities can be exploited by a remote, anonymous attacker to bypass security measures, manipulate data, disclose information, or cause denial of service.
Who is affected: Deployments of Netty.
Urgency: Medium urgency due to the variety of potential impacts including data manipulation and denial of service.
Action: Apply the latest patches for Netty to address these vulnerabilities.

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: 2026-08-14
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-2026-1372

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-2026-414170.31% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 23% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-425770.41% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 34% of all EPSS-scored CVEs.
Moderate exploitation riskCVE-2026-425781.1% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 62% of all EPSS-scored CVEs.
Moderate exploitation riskCVE-2026-425791.0% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 60% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-425800.36% 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-2026-425810.63% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 47% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-425820.44% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 37% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-425830.43% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 36% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-425840.78% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 53% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-425850.25% 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-2026-41417	coverage & exploitation status	NVD · CVE.org
CVE-2026-42577	coverage & exploitation status	NVD · CVE.org
CVE-2026-42578	coverage & exploitation status	NVD · CVE.org
CVE-2026-42579	coverage & exploitation status	NVD · CVE.org
CVE-2026-42580	coverage & exploitation status	NVD · CVE.org
CVE-2026-42581	coverage & exploitation status	NVD · CVE.org
CVE-2026-42582	coverage & exploitation status	NVD · CVE.org
CVE-2026-42583	coverage & exploitation status	NVD · CVE.org
CVE-2026-42584	coverage & exploitation status	NVD · CVE.org
CVE-2026-42585	coverage & exploitation status	NVD · CVE.org
CVE-2026-42586	coverage & exploitation status	NVD · CVE.org
CVE-2026-42587	coverage & exploitation status	NVD · CVE.org
CVE-2026-44248	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

unknownNCSC-2026-0325 [1.00] [M/H] Vulnerabilities patched in Atlassian productsncsc-nl
highexploited[NEW] [high] Atlassian Products (Bamboo, Bitbucket, Confluence, Crucible, Fisheye, and Jira): Multiple vulnera…cert-bund
unknownNCSC-2026-0309 [1.00] [M/H] Vulnerabilities resolved in Oracle Communicationsncsc-nl
unknownNCSC-2026-0306 [1.00] [H/H] Vulnerabilities resolved in Oracle Fusion Middlewarencsc-nl
high[NEW] [HIGH] Oracle Communications: Multiple Vulnerabilitiescert-bund
high[NEW] [high] Oracle Fusion Middleware: Multiple vulnerabilitiescert-bund
high[NEW] [high] Atlassian Bamboo, Bitbucket, Confluence, Fisheye, Crucible, Jira and Jira Service Management: Mul…cert-bund
unknownexploitedMultiple vulnerabilities in IBM products (August 14, 2026)cert-fr-avis
highexploited[UPDATE] [high] Atlassian Bamboo, Bitbucket, Confluence, Fisheye, Crucible, Jira and Jira Service Management: …cert-bund
unknownMultiple vulnerabilities in IBM products (August 07, 2026)cert-fr-avis
high[NEW] [high] Oracle Communications: Multiple vulnerabilitiescert-bund
unknownMultiple vulnerabilities in Atlassian products (July 27, 2026)cert-fr-avis

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[NEW] [medium] Netty: Multiple vulnerabilitiescert-bund · 2026-08-25
lowCVE-2026-76816: Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.13…nvd · 2026-08-24
unknownCVE-2026-62380: Netty (io.netty:netty-codec-socks) versions 4.2.0.Final through 4.2.16.Final and 4.1.x through…nvd · 2026-08-22
highCVE-2026-62243: Netty (io.netty:netty-handler) versions from 4.2.0.Final through 4.2.16.Final and versions thr…nvd · 2026-08-22
highGHSA-4899-mpch-38p3: netty-incubator-codec-ohttp BinaryHttpParser: Unauthenticated CPU-exhaustion DoS via infi…ghsa · 2026-08-20
highGHSA-hmq9-67w8-j5pw: netty-incubator-codec-ohttp: BinaryHttpParser should enforce limits for variable lengths …ghsa · 2026-08-20