CVE Explorer
CVE-2026-56820
Netty is a network application framework for development of protocol servers and clients. In versions 4.2.0.Final through 4.2.15.Final and prior to 4.1.135.Final, `OcspClient` does not validate that the `CertificateID` in an OCSP response matches the requested `CertificateID`, which can lead to replay attack. `OcspClient.validateResponse` accepts a legitimately signed `GOOD` status response for an unrelated certificate issued by the same CA, allowing bypass of revocation checks for another certi
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:v2:17823cb71fdd95f3ab6fa4be884ddd91ad72d01ffa29db91f87a400df7de969f · sha256:85edaf5ca12bd20f… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.4,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:17823cb71fdd95f3ab6fa4be884ddd91ad72d01ffa29db91f87a400df7de969f · sha256:85edaf5ca12bd20f… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-295","description":"CWE-295: Improper Certificate Validation","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:17823cb71fdd95f3ab6fa4be884ddd91ad72d01ffa29db91f87a400df7de969f · sha256:85edaf5ca12bd20f… · /containers/cna/problemTypes/0/descriptions/0
Source references
5 source assertions{"name":"https://github.com/netty/netty/commit/5b68c61f37aa4a3045cba624cbea239655c9003b","tags":["x_refsource_MISC"],"url":"https://github.com/netty/netty/commit/5b68c61f37aa4a3045cba624cbea239655c9003b"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:17823cb71fdd95f3ab6fa4be884ddd91ad72d01ffa29db91f87a400df7de969f · sha256:85edaf5ca12bd20f… · /containers/cna/references/1
{"name":"https://github.com/netty/netty/commit/bb2ff68a1fb71cb4b0eb9a9e17b66c52aff680c6","tags":["x_refsource_MISC"],"url":"https://github.com/netty/netty/commit/bb2ff68a1fb71cb4b0eb9a9e17b66c52aff680c6"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:17823cb71fdd95f3ab6fa4be884ddd91ad72d01ffa29db91f87a400df7de969f · sha256:85edaf5ca12bd20f… · /containers/cna/references/2
{"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_v5referenceurn:baitaphish:normalized-source-record:v2:17823cb71fdd95f3ab6fa4be884ddd91ad72d01ffa29db91f87a400df7de969f · sha256:85edaf5ca12bd20f… · /containers/cna/references/3
{"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_v5referenceurn:baitaphish:normalized-source-record:v2:17823cb71fdd95f3ab6fa4be884ddd91ad72d01ffa29db91f87a400df7de969f · sha256:85edaf5ca12bd20f… · /containers/cna/references/4
{"name":"https://github.com/netty/netty/security/advisories/GHSA-272m-gcwp-mpwg","tags":["x_refsource_CONFIRM"],"url":"https://github.com/netty/netty/security/advisories/GHSA-272m-gcwp-mpwg"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:17823cb71fdd95f3ab6fa4be884ddd91ad72d01ffa29db91f87a400df7de969f · sha256:85edaf5ca12bd20f… · /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.