GHSA-j382-5jj3-vw4j

Suggest an improvement
Source
https://github.com/advisories/GHSA-j382-5jj3-vw4j
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/01/GHSA-j382-5jj3-vw4j/GHSA-j382-5jj3-vw4j.json
JSON Data
https://api.test.osv.dev/v1/vulns/GHSA-j382-5jj3-vw4j
Aliases
  • CVE-2025-12543
Published
2026-01-07T18:30:25Z
Modified
2026-01-09T00:50:24.524280Z
Severity
  • 9.6 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:L CVSS Calculator
Summary
Undertow HTTP server core doesn't properly validate the Host header in incoming HTTP requests
Details

A flaw was found in the Undertow HTTP server core, which is used in WildFly, JBoss EAP, and other Java applications. The Undertow library fails to properly validate the Host header in incoming HTTP requests. As a result, requests containing malformed or malicious Host headers are processed without rejection, enabling attackers to poison caches, perform internal network scans, or hijack user sessions.

Database specific 
{
    "nvd_published_at": "2026-01-07T17:15:55Z",
    "cwe_ids": [
        "CWE-20"
    ],
    "github_reviewed_at": "2026-01-08T17:15:55Z",
    "github_reviewed": true,
    "severity": "CRITICAL"
}
References

Affected packages

Maven / io.undertow:undertow-core

Package

Name
io.undertow:undertow-core
View open source insights on deps.dev
Purl
pkg:maven/io.undertow/undertow-core

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Last affected
2.4.0.Alpha1

Affected versions

1.*

1.0.0.Alpha1
1.0.0.Alpha2
1.0.0.Alpha3
1.0.0.Alpha4
1.0.0.Alpha5
1.0.0.Alpha6
1.0.0.Alpha7
1.0.0.Alpha8
1.0.0.Alpha9
1.0.0.Alpha10
1.0.0.Alpha11
1.0.0.Alpha12
1.0.0.Alpha13
1.0.0.Alpha14
1.0.0.Alpha15
1.0.0.Alpha16
1.0.0.Alpha17
1.0.0.Alpha18
1.0.0.Alpha19
1.0.0.Alpha20
1.0.0.Alpha21
1.0.0.Alpha22
1.0.0.Beta1
1.0.0.Beta2
1.0.0.Beta3
1.0.0.Beta4
1.0.0.Beta5
1.0.0.Beta6
1.0.0.Beta7
1.0.0.Beta8
1.0.0.Beta9
1.0.0.Beta10
1.0.0.Beta11
1.0.0.Beta12
1.0.0.Beta13
1.0.0.Beta14
1.0.0.Beta15
1.0.0.Beta16
1.0.0.Beta17
1.0.0.Beta18
1.0.0.Beta19
1.0.0.Beta20
1.0.0.Beta21
1.0.0.Beta22
1.0.0.Beta23
1.0.0.Beta24
1.0.0.Beta25
1.0.0.Beta26
1.0.0.Beta27
1.0.0.Beta28
1.0.0.Beta29
1.0.0.Beta30
1.0.0.Beta31
1.0.0.Beta32
1.0.0.Beta33
1.0.0.CR1
1.0.0.CR2
1.0.0.CR3
1.0.0.CR4
1.0.0.CR5
1.0.0.Final
1.0.1.Final
1.0.2.Final
1.0.3.Final
1.0.4.Final
1.0.5.Final
1.0.6.Final
1.0.7.Final
1.0.8.Final
1.0.9.Final
1.0.10.Final
1.0.11.Final
1.0.12.Final
1.0.13.Final
1.0.14.Final
1.0.15.Final
1.0.16.Final
1.0.17.Final
1.0.18.Final
1.0.19.Final
1.1.0.Beta1
1.1.0.Beta2
1.1.0.Beta3
1.1.0.Beta4
1.1.0.Beta5
1.1.0.Beta6
1.1.0.Beta7
1.1.0.Beta8
1.1.0.CR1
1.1.0.CR2
1.1.0.CR3
1.1.0.CR4
1.1.0.CR5
1.1.0.CR6
1.1.0.CR7
1.1.0.CR8
1.1.0.Final
1.1.1.Final
1.1.2.Final
1.1.3.Final
1.1.4.Final
1.1.5.Final
1.1.6.Final
1.1.7.Final
1.1.8.Final
1.1.9.Final
1.2.0.Beta1
1.2.0.Beta2
1.2.0.Beta3
1.2.0.Beta4
1.2.0.Beta5
1.2.0.Beta6
1.2.0.Beta7
1.2.0.Beta8
1.2.0.Beta9
1.2.0.Beta10
1.2.0.CR1
1.2.0.Final
1.2.1.Final
1.2.2.Final
1.2.3.Final
1.2.4.Final
1.2.5.Final
1.2.6.Final
1.2.7.Final
1.2.8.Final
1.2.9.Final
1.2.10.Final
1.2.11.Final
1.2.12.Final
1.3.0.Beta1
1.3.0.Beta2
1.3.0.Beta3
1.3.0.Beta4
1.3.0.Beta5
1.3.0.Beta6
1.3.0.Beta7
1.3.0.Beta8
1.3.0.Beta9
1.3.0.Beta10
1.3.0.Beta11
1.3.0.Beta12
1.3.0.Beta13
1.3.0.CR1
1.3.0.CR2
1.3.0.CR3
1.3.0.Final
1.3.1.Final
1.3.2.Final
1.3.3.Final
1.3.4.Final
1.3.5.Final
1.3.6.Final
1.3.7.Final
1.3.8.Final
1.3.9.Final
1.3.10.Final
1.3.11.Final
1.3.12.Final
1.3.13.Final
1.3.14.Final
1.3.15.Final
1.3.16.Final
1.3.17.Final
1.3.18.Final
1.3.19.Final
1.3.20.Final
1.3.21.Final
1.3.22.Final
1.3.23.Final
1.3.24.Final
1.3.25.Final
1.3.26.Final
1.3.27.Final
1.3.28.Final
1.3.29.Final
1.3.30.Final
1.3.31.Final
1.3.32.Final
1.3.33.Final
1.4.0.Beta1
1.4.0.CR1
1.4.0.CR2
1.4.0.CR3
1.4.0.CR4
1.4.0.Final
1.4.1.Final
1.4.2.Final
1.4.3.Final
1.4.4.Final
1.4.5.Final
1.4.6.Final
1.4.7.Final
1.4.8.Final
1.4.9.Final
1.4.10.Final
1.4.11.Final
1.4.12.Final
1.4.13.Final
1.4.14.Final
1.4.15.Final
1.4.16.Final
1.4.17.Final
1.4.18.Final
1.4.19.Final
1.4.20.Final
1.4.21.Final
1.4.22.Final
1.4.23.Final
1.4.24.Final
1.4.25.Final
1.4.26.Final
1.4.27.Final
1.4.28.Final

2.*

2.0.0.Alpha1
2.0.0.Beta1
2.0.0.Final
2.0.1.Final
2.0.2.Final
2.0.3.Final
2.0.4.Final
2.0.5.Final
2.0.6.Final
2.0.7.Final
2.0.8.Final
2.0.9.Final
2.0.10.Final
2.0.11.Final
2.0.12.Final
2.0.13.Final
2.0.14.Final
2.0.15.Final
2.0.16.Final
2.0.17.Final
2.0.18.Final
2.0.19.Final
2.0.20.Final
2.0.21.Final
2.0.22.Final
2.0.23.Final
2.0.24.Final
2.0.25.Final
2.0.26.Final
2.0.27.Final
2.0.28.Final
2.0.29.Final
2.0.30.Final
2.0.31.Final
2.0.32.Final
2.0.33.Final
2.0.34.Final
2.0.35.Final
2.0.36.Final
2.0.37.Final
2.0.38.Final
2.0.39.Final
2.0.40.Final
2.0.41.Final
2.0.42.Final
2.1.0.Final
2.1.1.Final
2.1.2.Final
2.1.3.Final
2.1.4.Final
2.1.5.Final
2.1.6.Final
2.1.7.Final
2.1.8.Final
2.2.0.Final
2.2.1.Final
2.2.2.Final
2.2.3.Final
2.2.4.Final
2.2.5.Final
2.2.6.Final
2.2.7.Final
2.2.8.Final
2.2.9.Final
2.2.10.Final
2.2.11.Final
2.2.12.Final
2.2.13.Final
2.2.14.Final
2.2.15.Final
2.2.16.Final
2.2.17.Final
2.2.18.Final
2.2.19.Final
2.2.20.Final
2.2.21.Final
2.2.22.Final
2.2.23.Final
2.2.24.Final
2.2.25.Final
2.2.26.Final
2.2.27.Final
2.2.28.Final
2.2.29.Final
2.2.30.Final
2.2.31.Final
2.2.32.Final
2.2.33.Final
2.2.34.Final
2.2.35.Final
2.2.36.Final
2.2.37.Final
2.2.38.Final
2.3.0.Alpha1
2.3.0.Alpha2
2.3.0.Beta1
2.3.0.Final
2.3.1.Final
2.3.2.Final
2.3.3.Final
2.3.4.Final
2.3.5.Final
2.3.6.Final
2.3.7.Final
2.3.8.Final
2.3.9.Final
2.3.10.Final
2.3.11.Final
2.3.12.Final
2.3.13.Final
2.3.14.Final
2.3.15.Final
2.3.16.Final
2.3.17.Final
2.3.18.Final
2.3.19.Final
2.3.20.Final
2.4.0.Alpha1

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/01/GHSA-j382-5jj3-vw4j/GHSA-j382-5jj3-vw4j.json"