CVE Explorer
CVE-2026-50560
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, Netty HTTP/2 max header size handling produces an attack similar to HTTP/2 Rapid Reset. There is a setting in the http2 specification called `SETTINGS_MAX_HEADER_LIST_SIZE`. When a client sends that setting to Netty, it appears that Netty will behave as follows: read the request; proxy the request to the origin; attempt to produce a response; and create an e
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:a9d0076da4a846ec8c95642f1a2c4affb981540dde37e5adcd219c7e270136ad · sha256:8bfc48f67b836b5a… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":6.9,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:a9d0076da4a846ec8c95642f1a2c4affb981540dde37e5adcd219c7e270136ad · sha256:8bfc48f67b836b5a… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-770","description":"CWE-770: Allocation of Resources Without Limits or Throttling","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:a9d0076da4a846ec8c95642f1a2c4affb981540dde37e5adcd219c7e270136ad · sha256:8bfc48f67b836b5a… · /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:a9d0076da4a846ec8c95642f1a2c4affb981540dde37e5adcd219c7e270136ad · sha256:8bfc48f67b836b5a… · /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:a9d0076da4a846ec8c95642f1a2c4affb981540dde37e5adcd219c7e270136ad · sha256:8bfc48f67b836b5a… · /containers/cna/references/2
{"name":"https://github.com/netty/netty/security/advisories/GHSA-563q-j3cm-6jxm","tags":["x_refsource_CONFIRM"],"url":"https://github.com/netty/netty/security/advisories/GHSA-563q-j3cm-6jxm"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:a9d0076da4a846ec8c95642f1a2c4affb981540dde37e5adcd219c7e270136ad · sha256:8bfc48f67b836b5a… · /containers/cna/references/0
{"name":"https://www.rfc-editor.org/rfc/rfc9113.html#name-defined-settings","tags":["x_refsource_MISC"],"url":"https://www.rfc-editor.org/rfc/rfc9113.html#name-defined-settings"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:a9d0076da4a846ec8c95642f1a2c4affb981540dde37e5adcd219c7e270136ad · sha256:8bfc48f67b836b5a… · /containers/cna/references/3
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.