Vulnerability details
CVE-2026-28367
Red Hat Data Grid 8Red Hat Fuse 7Red Hat JBoss Enterprise Application Platform 7Red Hat JBoss Enterprise Application Platform 8Red Hat JBoss Enterprise Application Platform Expansion PackRed Hat Process Automation 7
Undertow: undertow: request smuggling via `\r\r\r` as a header block terminator
CVSS 3.1
8.7High
Official description
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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.7High | 3.1 | CVEProject cvelistV5 (CNA) (redhat) | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Red Hat | Red Hat Data Grid 8 | All | CVEProject cvelistV5 (CNA) |
| Red Hat | Red Hat Fuse 7 | All | CVEProject cvelistV5 (CNA) |
| Red Hat | Red Hat JBoss Enterprise Application Platform 7 | All | CVEProject cvelistV5 (CNA) |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8 | All | CVEProject cvelistV5 (CNA) |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8 | All | CVEProject cvelistV5 (CNA) |
| Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack | All | CVEProject cvelistV5 (CNA) |
| Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack | All | CVEProject cvelistV5 (CNA) |
| Red Hat | Red Hat Process Automation 7 | All | CVEProject cvelistV5 (CNA) |
| Red Hat | Red Hat Single Sign-On 7 | All | CVEProject cvelistV5 (CNA) |
| Red Hat | Red Hat build of Apache Camel for Spring Boot 4 | All | CVEProject cvelistV5 (CNA) |
References and advisories
4- https://access.redhat.com/errata/RHSA-2026:25125 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:25126 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2026-28367 vdb-entryx_refsource_REDHAT
- https://bugzilla.redhat.com/show_bug.cgi?id=2443260 issue-trackingx_refsource_REDHAT
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Details
- Published
- 2026-03-27
- Last updated
- 2026-11-05
- State
- Published
- Assigner (CNA)
- redhat
Exploit prediction (EPSS)
0.71%
Probability of exploitation in 30 days
54%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-444Inconsistent Interpretation of HTTP Requests