CVE Explorer
CVE-2026-42585
Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, Netty incorrectly parses malformed Transfer-Encoding, enabling request smuggling attacks. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final.
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1
Preserved source conflicts
No provider value was silently selected as the winner.
affected · 2 assertions
{"product":"netty-codec-http","vendor":"io.netty","versions":[{"status":"affected","version":">= 4.2.0.Alpha1, < 4.2.13.Final"},{"status":"affected","version":"< 4.1.133.Final"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:d265b902e67c318f432e97ccb5ab1274e628a19801707fb82f8445f3c13072bf · sha256:cea0518e4c943dae… · /containers/cna/affected/1
{"product":"netty","vendor":"netty","versions":[{"status":"affected","version":">= 4.2.0.Alpha1, < 4.2.13.Final"},{"status":"affected","version":"< 4.1.133.Final"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:d265b902e67c318f432e97ccb5ab1274e628a19801707fb82f8445f3c13072bf · sha256:cea0518e4c943dae… · /containers/cna/affected/0
Affected products and versions
2 source assertions{"product":"netty-codec-http","vendor":"io.netty","versions":[{"status":"affected","version":">= 4.2.0.Alpha1, < 4.2.13.Final"},{"status":"affected","version":"< 4.1.133.Final"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:d265b902e67c318f432e97ccb5ab1274e628a19801707fb82f8445f3c13072bf · sha256:cea0518e4c943dae… · /containers/cna/affected/1
{"product":"netty","vendor":"netty","versions":[{"status":"affected","version":">= 4.2.0.Alpha1, < 4.2.13.Final"},{"status":"affected","version":"< 4.1.133.Final"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:d265b902e67c318f432e97ccb5ab1274e628a19801707fb82f8445f3c13072bf · sha256:cea0518e4c943dae… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:d265b902e67c318f432e97ccb5ab1274e628a19801707fb82f8445f3c13072bf · sha256:cea0518e4c943dae… · /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:d265b902e67c318f432e97ccb5ab1274e628a19801707fb82f8445f3c13072bf · sha256:cea0518e4c943dae… · /containers/cna/problemTypes/0/descriptions/0
Source references
2 source assertions{"tags":["exploit"],"url":"https://github.com/netty/netty/security/advisories/GHSA-38f8-5428-x5cv"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:d265b902e67c318f432e97ccb5ab1274e628a19801707fb82f8445f3c13072bf · sha256:cea0518e4c943dae… · /containers/adp/0/references/0
{"name":"https://github.com/netty/netty/security/advisories/GHSA-38f8-5428-x5cv","tags":["x_refsource_CONFIRM"],"url":"https://github.com/netty/netty/security/advisories/GHSA-38f8-5428-x5cv"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:d265b902e67c318f432e97ccb5ab1274e628a19801707fb82f8445f3c13072bf · sha256:cea0518e4c943dae… · /containers/cna/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.