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CVE-2026-59920

Netty is an asynchronous, event-driven network application framework. In versions prior to 4.1.136.Final and 4.2.16.Final, Netty's STOMP encoder ( StompSubframeEncoder ) does not escape or validate header values in  CONNECT  and  CONNECTED  frames, so raw newline ( \n ) characters in a header value are written directly to the wire, allowing an attacker who controls a header value to inject additional STOMP headers. This happens because the encoder intentionally skips escaping for CONNECT/CONNECT
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:dfa52fc936afdba9e317b52cc166cdedcc12ee4c4b073d451c91f84f0694ae85
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":"< 4.1.136.Final"},{"status":"affected","version":">= 4.2.0.Final, < 4.2.16.Final"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ca046d80c1938afad4321273ff676ab73d8bd5a0704bab02ec9818b641b3c5b2 · sha256:c311407cb63cb9fd… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:ca046d80c1938afad4321273ff676ab73d8bd5a0704bab02ec9818b641b3c5b2 · sha256:c311407cb63cb9fd… · /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_v5cwe
    urn:baitaphish:normalized-source-record:v2:ca046d80c1938afad4321273ff676ab73d8bd5a0704bab02ec9818b641b3c5b2 · sha256:c311407cb63cb9fd… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/netty/netty/security/advisories/GHSA-3g8r-4pfx-jmfh","tags":["x_refsource_CONFIRM"],"url":"https://github.com/netty/netty/security/advisories/GHSA-3g8r-4pfx-jmfh"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ca046d80c1938afad4321273ff676ab73d8bd5a0704bab02ec9818b641b3c5b2 · sha256:c311407cb63cb9fd… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/netty/netty/security/advisories/GHSA-3g8r-4pfx-jmfh"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ca046d80c1938afad4321273ff676ab73d8bd5a0704bab02ec9818b641b3c5b2 · sha256:c311407cb63cb9fd… · /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.

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