CVE Explorer
CVE-2026-50020
Netty is a network application framework for development of protocol servers and clients. Prior to versions 4.1.135.Final and 4.2.15.Final, before reading the first request-line, `HttpObjectDecoder` skips every byte for which `Character.isISOControl(b)` is `true` (0x00–0x1F and 0x7F) as well as all whitespace. RFC 9112 §2.2 only asks servers to ignore empty CRLF lines preceding the request-line — a carefully scoped robustness allowance intended to handle HTTP/1.0 POST workarounds. Silently absor
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"netty","vendor":"netty","versions":[{"status":"affected","version":">= 4.2.0.Final, < 4.2.15.Final"},{"status":"affected","version":"< 4.1.135.Final"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:f991c2b8d1fd474391b3b054d905448a53ca1573091ae0c8de4558f8820e5a32 · sha256:e0384380b89f9b70… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:f991c2b8d1fd474391b3b054d905448a53ca1573091ae0c8de4558f8820e5a32 · sha256:e0384380b89f9b70… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-444","description":"CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:f991c2b8d1fd474391b3b054d905448a53ca1573091ae0c8de4558f8820e5a32 · sha256:e0384380b89f9b70… · /containers/cna/problemTypes/0/descriptions/0
Source references
4 source assertions{"name":"https://github.com/netty/netty/releases/tag/netty-4.1.135.Final","tags":["x_refsource_MISC"],"url":"https://github.com/netty/netty/releases/tag/netty-4.1.135.Final"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:f991c2b8d1fd474391b3b054d905448a53ca1573091ae0c8de4558f8820e5a32 · sha256:e0384380b89f9b70… · /containers/cna/references/1
{"name":"https://github.com/netty/netty/releases/tag/netty-4.2.15.Final","tags":["x_refsource_MISC"],"url":"https://github.com/netty/netty/releases/tag/netty-4.2.15.Final"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:f991c2b8d1fd474391b3b054d905448a53ca1573091ae0c8de4558f8820e5a32 · sha256:e0384380b89f9b70… · /containers/cna/references/2
{"name":"https://github.com/netty/netty/security/advisories/GHSA-hvcg-qmg6-jm4c","tags":["x_refsource_CONFIRM"],"url":"https://github.com/netty/netty/security/advisories/GHSA-hvcg-qmg6-jm4c"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:f991c2b8d1fd474391b3b054d905448a53ca1573091ae0c8de4558f8820e5a32 · sha256:e0384380b89f9b70… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/netty/netty/security/advisories/GHSA-hvcg-qmg6-jm4c"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:f991c2b8d1fd474391b3b054d905448a53ca1573091ae0c8de4558f8820e5a32 · sha256:e0384380b89f9b70… · /containers/adp/0/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.