How severe is CVE-2018-1067?

CVE-2018-1067 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2018-1067 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-1067?

CVE-2018-1067 primarily affects Redhat Undertow. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-1067?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-1067 published?

CVE-2018-1067 was published on 2018-05-21 and last updated on 2026-06-17.

CVE-2018-1067

CVE-2018-1067 is a medium-severity vulnerability in Redhat Undertow with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-113.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 5.8
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-113
Affected product: Redhat Undertow
Published: 2018-05-21
Last modified: 2026-06-17

Description

In Undertow before versions 7.1.2.CR1, 7.1.2.GA it was found that the fix for CVE-2016-4993 was incomplete and Undertow web server is vulnerable to the injection of arbitrary HTTP headers, and also response splitting, due to insufficient sanitization and validation of user input before the input is used as part of an HTTP header value.

Frequently asked questions

What is CVE-2018-1067?: In Undertow before versions 7.1.2.CR1, 7.1.2.GA it was found that the fix for CVE-2016-4993 was incomplete and Undertow web server is vulnerable to the injection of arbitrary HTTP headers, and also response splitting, due to insufficient sanitization and validation of user input before the input is used as part of an HTTP header value.
How severe is CVE-2018-1067?: CVE-2018-1067 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2018-1067 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-1067?: CVE-2018-1067 primarily affects Redhat Undertow. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-1067?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-1067 published?: CVE-2018-1067 was published on 2018-05-21 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:redhat:undertow:*:*:*:*:*:*:*:*
cpe:2.3:a:redhat:jboss_enterprise_application_platform:7.1:*:*:*:*:*:*:*
cpe:2.3:a:redhat:virtualization_host:4.0:*:*:*:*:*:*:*

More vulnerabilities in Redhat Undertow

CVE-2019-10212 — Critical (CVSS 9.8): A flaw was found in, all under 2.0.20, in the Undertow DEBUG log for io.undertow.request.security. If enabled, an…
CVE-2019-3888 — Critical (CVSS 9.8): A vulnerability was found in Undertow web server before 2.0.21. An information exposure of plain text credentials…
CVE-2025-12543 — Critical (CVSS 9.6): A flaw was found in the Undertow HTTP server core, which is used in WildFly, JBoss EAP, and other Java applications.…
CVE-2026-28369 — High (CVSS 8.7): A flaw was found in Undertow. When Undertow receives an HTTP request where the first header line starts with one or…
CVE-2026-28368 — High (CVSS 8.7): A flaw was found in Undertow. This vulnerability allows a remote attacker to construct specially crafted requests where…
CVE-2026-28367 — High (CVSS 8.7): A flaw was found in Undertow. A remote attacker can exploit this vulnerability by sending `\r\r\r` as a header block…

All CVEs affecting Redhat Undertow →

Other CWE-113 (HTTP Response Splitting) vulnerabilities

CVE-2026-38967 — Critical (CVSS 9.8): CrowCpp Crow through v1.3.1 HTTP is vulnerable to response header injection via unvalidated response header values.
CVE-2026-34520 — Critical (CVSS 9.1): AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, the C parser…
CVE-2025-53007 — High (CVSS 8.9): arduino-esp32 provides an Arduino core for the ESP32. Versions prior to 3.3.0-RC1 and 3.2.1 contain a HTTP Response…
CVE-2024-52875 — High (CVSS 8.8): An issue was discovered in GFI Kerio Control 9.2.5 through 9.4.5. The dest GET parameter passed to the…
CVE-2018-0689 — High (CVSS 8.8): HTTP header injection vulnerability in SEIKO EPSON printers and scanners (DS-570W firmware versions released prior to…
CVE-2018-11347 — High (CVSS 8.8): The YunoHost 2.7.2 through 2.7.14 web application is affected by one HTTP Response Header Injection. This flaw allows…

Browse all CWE-113 (HTTP Response Splitting) vulnerabilities →