CVE-2026-28367
CVE-2026-28367: 1 tracked advisory record across Red Hat. Compare vendor sources and published fix guidance.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Red Hat
1 advisory- Advisory severityHigh8.7
High [CVE-2026-28367] Undertow: undertow: request smuggling via `\r\r\r` as a header block terminator
CVE-2026-28367Source published Source updated
A flaw was found in Undertow. A remote attacker can exploit this vulnerability by sending `\r\r\r` as a header block terminator. This can be used for request smuggling with certain proxy servers, such as older versions of Apache Traffic Server and Google Cloud Classic Application Load Balancer, potentially leading to unauthorized access or manipulation of web requests. The Undertow web server is susceptible to request smuggling when deployed with certain proxy servers that forward `\r\r\r` as a header block terminator. Red Hat products using Undertow in environments with vulnerable proxy configurations, such as those found in older versions of Apache Traffic Server or Google Cloud Classic Application Load Balancer, are at risk. Red Hat severity: Important — CVSS 8.7…
- Affected products in this advisory
- Red Hat JBoss Enterprise Application Platform 8.1.7.GA
- Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8
- Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9
- Red Hat build of Apache Camel for Spring Boot 4
6 more entries in the full advisory.
- Source-reported affected versions
- Affected-version details not available in this record.
- Source-reported fixed versions
- io.undertow/undertow-core:2.3.24.SP3-redhat-00001
- eap8-activemq-artemis-0:2.40.0-7.redhat_00015.1.el8eap
- eap8-eap-product-conf-parent-0:801.6.1-1.GA_redhat_00001.1.el8eap
- eap8-undertow-0:2.3.24-3.SP2_redhat_00001.1.el8eap
7 more entries in the full advisory.
- Mitigation guidance
- To mitigate this vulnerability, configure any proxy servers positioned in front of Undertow to strictly validate HTTP header terminations. Ensure that these proxies are configured to reject or normalize non-standard header block terminators, such as `\r\r\r`, before forwarding requests to Undertow. This operational control helps prevent request smuggling attacks by ensuring that only properly formed HTTP requests reach the Undertow server.
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