CVE-2022-4492 is a high-severity (CVSS 7.5) Server-Side Request Forgery (SSRF) vulnerability in io.undertow:undertow-core. A fix is available for io.undertow:undertow-core — see the affected versions and patch details below.
Undertow client not checking server identity presented by server certificate in https connections
Exploitation Status
No confirmed exploitation observed yet
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2022-4492.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
io.undertow:undertow-core☕io.undertow:undertow-coreReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.
Description
The undertow client is not checking the server identity presented by the server certificate in https connections. This is a compulsory step (at least it should be performed by default) in https and in http/2. I would add it to any TLS client protocol.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | io.undertow:undertow-core | ≥ 2.3.0&&< 2.3.5.Final | 2.3.5.Finalio.undertow:undertow-core:2.3.5.Final |
| ☕Maven | io.undertow:undertow-core | all versions | 2.2.24.Finalio.undertow:undertow-core:2.2.24.Final |
Affected Products
build of quarkusredhatintegration camel for spring bootredhatintegration camel kredhatintegration service registryredhatjboss enterprise application platformredhatjboss fuseredhatDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for io.undertow:undertow-core, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update io.undertow:undertow-core to 2.3.5.Final or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2022-4492 is resolved across your whole dependency graph.
Workarounds
Restrict outbound requests from the affected component to an allowlist of hosts, block access to link-local and internal address ranges at the network layer, and require authentication on internal services so a forged request cannot reach them unauthenticated.
Fixing This On Your OS
If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.
| Product | Fixed in | Advisory |
|---|---|---|
| Migration Toolkit for Runtimes 1 on RHEL 8 | mtr/mtr-web-container-rhel8:1.1-8 | RHSA-2023:3813 |
| MTA-6.2-RHEL-9 | mta/mta-operator-bundle:6.2.0-29 | RHSA-2023:4627 |
| Red Hat Fuse 7.12 | undertow | RHSA-2023:3954 |
| Red Hat JBoss Enterprise Application Platform | io.undertow/undertow-core:2.2.23.SP2-redhat-00001 | RHSA-2023:1516 |
| Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7 | eap7-glassfish-el-0:3.0.1-4.b08_redhat_00005.1.ep7.el7 | RHSA-2025:9582 |
| Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7 | eap7-jackson-annotations-0:2.10.4-3.redhat_00006.1.el7eap | RHSA-2025:9583 |
| Red Hat JBoss Enterprise Application Platform 7.4 for RHEL 8 | eap7-undertow-0:2.2.23-1.SP2_redhat_00001.1.el8eap | RHSA-2023:1513 |
| Red Hat JBoss Enterprise Application Platform 7.4 for RHEL 9 | eap7-undertow-0:2.2.23-1.SP2_redhat_00001.1.el9eap | RHSA-2023:1514 |
Frequently Asked Questions
Is CVE-2022-4492 in your dependencies?
Find it across Maven, including transitive dependencies.