Advisory details:
gitlab / maven/io.netty/netty-handler/CVE-2026-62243
| Advisory ID | gitlab/maven/io.netty/netty-handler/CVE-2026-62243 |
| Aliases |
CVE-2026-62243
GHSA-p85m-gvr3-788c |
| Summary | Improper Validation of Certificate with Host Mismatch Netty disables TLS hostname verification on the `SslProvider.OPENSSL` client path when a plain (non-extended) `X509TrustManager` is used and `Unsafe`-based trust-manager wrapping is unavailable (Java 25+). In this configuration the OpenSSL client does not perform hostname verification, allowing a man-in-the-middle attacker to present a certificate issued for a different hostname that is accepted without validation. |
| Status | Published |
| Exploitability | 0.5 |
| Weighted Severity | 0.0 |
| Risk | |
| Affected and Fixed Packages | Package Details |
| Introduced and Fixed Package Commit Patches | Package Commit Patches Details |
| System | Score | Found at |
|---|---|---|
| cvssv3.1 | https://gitlab.com/gitlab-org/advisories-community/-/blob/main/maven/io.netty/netty-handler/CVE-2026-62243.yml |
| Reference id | Reference type | URL |
|---|---|---|
| https://github.com/netty/netty/security/advisories/GHSA-p85m-gvr3-788c | ||
| CVE-2026-62243 | https://nvd.nist.gov/vuln/detail/CVE-2026-62243 |
No EPSS data available for this advisory.
| Patch URL | |
|---|---|
| There are no known patches. | |
| Attack Vector (AV) | Attack Complexity (AC) | Privileges Required (PR) | User Interaction (UI) | Scope (S) | Confidentiality Impact (C) | Integrity Impact (I) | Availability Impact (A) |
|---|---|---|---|---|---|---|---|
network adjacent_network local physical |
low high |
none low high |
none required |
unchanged changed |
high low none |
high low none |
high low none |
There are no SSVC decisions available.