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 certificate. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final.
Advisories
| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-272m-gcwp-mpwg | Netty: Missing CertificateID Validation in OCSP Response Allows Replay Attacks |
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Wed, 22 Jul 2026 14:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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Wed, 22 Jul 2026 05:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Netty
Netty netty |
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| Vendors & Products |
Netty
Netty netty |
Tue, 21 Jul 2026 22:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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 certificate. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final. | |
| Title | Netty: Missing CertificateID Validation in OCSP Response Allows Replay Attacks | |
| Weaknesses | CWE-295 | |
| References |
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|
| Metrics |
cvssV3_1
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Projects
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-07-24T03:55:58.915Z
Reserved: 2026-06-23T14:55:09.116Z
Link: CVE-2026-56820
Updated: 2026-07-22T13:29:04.734Z
No data.
No data.
OpenCVE Enrichment
Updated: 2026-07-22T05:15:02Z
Weaknesses
Github GHSA