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CVE-2026-56746

Netty is a network application framework for development of protocol servers and clients. Versions 4.2.0.Final through 4.2.15.Final and 4.1.0.Final through 4.1.135.Final, are vulnerable to security control bypass during the origin evaluation process. CorsHandler provides a shortCircuit() configuration designed to reject unauthorized cross-origin requests immediately, acting as a security control before requests reach the application. However, due to a logical operator error in the origin evaluat
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:44f7b2e685165a4159af34e8791357f6f5e8866ac1a6916238c8b8208d302c55
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":">= 4.1.0.Final, < 4.1.136.Final"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:daa83002de6d582b4fc0fe342587d09045bf9de69fa0af3afe8b0ea6ce144386 · sha256:e176b487b907eee5… · /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":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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:daa83002de6d582b4fc0fe342587d09045bf9de69fa0af3afe8b0ea6ce144386 · sha256:e176b487b907eee5… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-284","description":"CWE-284: Improper Access Control","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:daa83002de6d582b4fc0fe342587d09045bf9de69fa0af3afe8b0ea6ce144386 · sha256:e176b487b907eee5… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/netty/netty/releases/tag/netty-4.1.136.Final","tags":["x_refsource_MISC"],"url":"https://github.com/netty/netty/releases/tag/netty-4.1.136.Final"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:daa83002de6d582b4fc0fe342587d09045bf9de69fa0af3afe8b0ea6ce144386 · sha256:e176b487b907eee5… · /containers/cna/references/1
{"name":"https://github.com/netty/netty/releases/tag/netty-4.2.16.Final","tags":["x_refsource_MISC"],"url":"https://github.com/netty/netty/releases/tag/netty-4.2.16.Final"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:daa83002de6d582b4fc0fe342587d09045bf9de69fa0af3afe8b0ea6ce144386 · sha256:e176b487b907eee5… · /containers/cna/references/2
{"name":"https://github.com/netty/netty/security/advisories/GHSA-6cqp-g7gg-8hr5","tags":["x_refsource_CONFIRM"],"url":"https://github.com/netty/netty/security/advisories/GHSA-6cqp-g7gg-8hr5"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:daa83002de6d582b4fc0fe342587d09045bf9de69fa0af3afe8b0ea6ce144386 · sha256:e176b487b907eee5… · /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.

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