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CVE-2026-55851

🗓️ 21 Jul 2026 21:22:34Reported by Debian Security Bug TrackerType 
debiancve
 debiancve🔗 security-tracker.debian.org👁 3 Views

Netty is a network application framework for development of protocol servers and clients. In versions 4.2.0.Final up to (but not including) 4.2.16.Final, and 4.1.0.Final up to (but not including) 4.1.135, the HAProxyMessageDecoder in Netty's codec...

Related
Packages
ReporterTitlePublishedViews
Family
CVE		CVE-2026-55851
21 Jul 202621:22
–cve
Cvelist		CVE-2026-55851 Netty codec-haproxy: Signed-Byte Sentinel Collision in HAProxyMessageDecoder Leads to Unbounded Memory Exhaustion
21 Jul 202621:22
–cvelist
EUVD		EUVD-2026-46438
22 Jul 202621:23
–euvd
Github Security Blog		Netty: [codec-haproxy] Signed-Byte Sentinel Collision in HAProxyMessageDecoder Leads to Unbounded Memory Exhaustion
22 Jul 202621:23
–github
NVD		CVE-2026-55851
21 Jul 202622:17
–nvd
OSV		CVE-2026-55851 Netty codec-haproxy: Signed-Byte Sentinel Collision in HAProxyMessageDecoder Leads to Unbounded Memory Exhaustion
21 Jul 202621:22
–osv
OSV		DEBIAN-CVE-2026-55851
21 Jul 202622:17
–osv
OSV		GHSA-Q6CQ-MHR2-JMR5 Netty: [codec-haproxy] Signed-Byte Sentinel Collision in HAProxyMessageDecoder Leads to Unbounded Memory Exhaustion
22 Jul 202621:23
–osv
Positive Technologies		PT-2026-62225
21 Jul 202600:00
–ptsecurity
Vulnrichment		CVE-2026-55851 Netty codec-haproxy: Signed-Byte Sentinel Collision in HAProxyMessageDecoder Leads to Unbounded Memory Exhaustion
21 Jul 202621:22
–vulnrichment
Rows per page
OSOS VersionArchitecturePackagePackage VersionFilename
Debian11allnetty1:4.1.48-4+deb11u3netty_1:4.1.48-4+deb11u3_all.deb
Debian12allnetty1:4.1.48-7+deb12u2netty_1:4.1.48-7+deb12u2_all.deb
Debian13allnetty1:4.1.48-10+deb13u1netty_1:4.1.48-10+deb13u1_all.deb
Debian14allnetty1:4.1.48-16netty_1:4.1.48-16_all.deb
Debian999allnetty1:4.1.48-16netty_1:4.1.48-16_all.deb

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21 Jul 2026 21:22Current
5.5Medium risk
Vulners AI Score5.5
CVSS 48.7
EPSS0.00524
3