HIGHMaven →
Undertow HTTP server core doesn't properly validate the Host header in incoming HTTP requests
Undertow HTTP server core doesn't properly validate the Host header in incoming HTTP requests
Affected packages
- io.undertow:undertow-core— 2.3.0.Alpha1 → 2.3.21.Final
Exploit signal
- Known exploited (CISA KEV)
- No
- EPSS score
- —
- EPSS percentile
- —
EPSS is the probability a CVE is exploited in the wild; percentile is its rank among all CVEs.
Sources
- 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
Structured record: https://osv.dev/vulnerability/GHSA-j382-5jj3-vw4j
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