CVE-2025-12543
1 advisory.
Maven/io.undertow:undertow-core CVE-2025-12543: critical 9.6
Undertow HTTP server core doesn't properly validate the Host header in incoming HTTP requests
Action: Upgrade io.undertow:undertow-core to 2.2.39.Final (2.2.x) or 2.3.21.Final (2.3.x) or later.
Affected
| introduced | fixed | last affected |
|---|---|---|
| 2.3.0.Alpha1 | 2.3.21.Final | - |
| 0 | 2.2.39.Final | - |
Fixed versions
| 2.3.21.Final | 2.2.39.Final |
Sources
- osv: GHSA-j382-5jj3-vw4j
- https://nvd.nist.gov/vuln/detail/CVE-2025-12543
- https://github.com/undertow-io/undertow/pull/1860
- https://github.com/undertow-io/undertow/pull/1857
- https://issues.redhat.com/browse/UNDERTOW-2656
- https://github.com/undertow-io/undertow/releases/tag/2.3.21.Final
- https://github.com/undertow-io/undertow/releases/tag/2.2.39.Final
- https://github.com/undertow-io/undertow
- https://bugzilla.redhat.com/show_bug.cgi?id=2408784
- https://access.redhat.com/security/cve/CVE-2025-12543
- https://access.redhat.com/errata/RHSA-2026:4924
- https://access.redhat.com/errata/RHSA-2026:4917
- https://access.redhat.com/errata/RHSA-2026:4916
- https://access.redhat.com/errata/RHSA-2026:4915
- https://access.redhat.com/errata/RHSA-2026:3892
- https://access.redhat.com/errata/RHSA-2026:3891
- https://access.redhat.com/errata/RHSA-2026:3890
- https://access.redhat.com/errata/RHSA-2026:3889
- https://access.redhat.com/errata/RHSA-2026:0386
- https://access.redhat.com/errata/RHSA-2026:0384
- https://access.redhat.com/errata/RHSA-2026:0383
CVE-2025-12543 · published · modified · JSON