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Netty-codec-haproxy CVEs with a proof of concept

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Product netty-codec-haproxy✕
Overview 2 matches · 0 protected · 0 exploited · 0 CISA KEV · 0 public PoC · 0 EPSS ≥ 0.5
2matches 0protected0.0% 0exploited0.0% 0CISA KEV0.0% 0public PoC0.0% 0EPSS ≥ 0.50.0%
Protected by Waratek 0 0.0% Rule in development 0 0.0% Mitigation candidate 0 0.0% No exploit published 2 100.0%
Critical 0 0.0% High 1 50.0% Medium 1 50.0% Low 0 0.0% None 0 0.0% Unknown 0 0.0%
blocked by ARMR today 0 0.0% partly blocked 0 0.0% not blocked 2 100.0% not established 0 0.0% unrecorded 0 0.0%
Exploited 0 0.0% Working exploit published 0 0.0% Proof of concept only 2 100.0% Forecast only 0 0.0% No public exploit 0 0.0%
split by peak 1 / quarter
No exploit published: 2 Medium: 1High: 1 not blocked: 2 Proof of concept only: 2
Q4 221 No exploit published1 High1 not blocked1 Proof of concept only1 Q1 230 Q2 230 Q3 230 Q4 230 Q1 240 Q2 240 Q3 240 Q4 240 Q1 250 Q2 250 Q3 250 Q4 250 Q1 260 Q2 260 Q3 261 No exploit published1 Medium1 not blocked1 Proof of concept only1
Q1 23Q3 23Q1 24Q3 24Q1 25Q3 25Q1 26Q3 26
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CVE Severity Published▾ Status Exploitation Description
CVE-2026-59919 Medium 2026-07-29 No exploit published Proof of concept only Netty is an asynchronous, event-driven network application framework. In versions prior to 4.1.136.Final and 4.2.16.Final, Netty's HAProxy encoder ( HAProxyMessageEncoder ) writes AF_UNIX source and destination socket addresses into the HAProxy V1 text protocol without validating them for CRLF characters, so an attacker who controls an AF_UNIX address can inject  \r\n  sequences and split the single PROXY header into multiple lines. This is possible because the V1 protocol uses CRLF as its line terminator and, unlike IPv4/IPv6 addresses whose format checks implicitly reject CRLF, AF_UNIX addresses are only validated for length (up to 108 bytes), allowing a forged second PROXY header line that spoofs the client source/destination IP to a downstream server or load balancer. The issue is fixed in versions 4.1.136.Final and 4.2.16.Final.
CVE-2022-41881 High 2022-12-12 No exploit published Proof of concept only Netty project is an event-driven asynchronous network application framework. In versions prior to 4.1.86.Final, a StackOverflowError can be raised when parsing a malformed crafted message due to an infinite recursion. This issue is patched in version 4.1.86.Final. There is no workaround, except using a custom HaProxyMessageDecoder.