CVE Explorer
CVE-2026-59921
Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.136.Final and 4.2.16.Final, HttpPostRequestEncoder constructs multipart HTTP request bodies by directly concatenating user-supplied filenames and field names into Content-Disposition MIME headers without validating or sanitizing CRLF characters (\r\n). Since MIME headers are delimited by CRLF, an attacker who controls the filename can inject arbitrary MIME headers into the multipart body part. The root ca
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, < 4.2.16.Final"},{"status":"affected","version":"< 4.1.136.Final"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:808ce45101150f6083e1a212ac5e085f3bc95ee1c6b4cd8adb5689dd5e464d32 · sha256:e7947fe887ab10ca… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"ADJACENT_NETWORK","availabilityImpact":"NONE","baseScore":5.7,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:808ce45101150f6083e1a212ac5e085f3bc95ee1c6b4cd8adb5689dd5e464d32 · sha256:e7947fe887ab10ca… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-93","description":"CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection')","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:808ce45101150f6083e1a212ac5e085f3bc95ee1c6b4cd8adb5689dd5e464d32 · sha256:e7947fe887ab10ca… · /containers/cna/problemTypes/0/descriptions/0
Source references
2 source assertions{"tags":["exploit"],"url":"https://github.com/netty/netty/security/advisories/GHSA-gcjf-9mgh-3p7g"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:808ce45101150f6083e1a212ac5e085f3bc95ee1c6b4cd8adb5689dd5e464d32 · sha256:e7947fe887ab10ca… · /containers/adp/0/references/0
{"name":"https://github.com/netty/netty/security/advisories/GHSA-gcjf-9mgh-3p7g","tags":["x_refsource_CONFIRM"],"url":"https://github.com/netty/netty/security/advisories/GHSA-gcjf-9mgh-3p7g"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:808ce45101150f6083e1a212ac5e085f3bc95ee1c6b4cd8adb5689dd5e464d32 · sha256:e7947fe887ab10ca… · /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.