CVE-2026-47220
CVE-2026-47220: 1 tracked advisory record across Red Hat. Compare vendor sources and published fix guidance.
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Vendor advisory comparison
Red Hat
1 advisory- Advisory severityHigh7.5
High [CVE-2026-47220] Denial of Service via missing host header in specific logging configurations
CVE-2026-47220Source published Source updated
Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.37.0 until 1.37.5 and 1.38.3, when the %REQUESTED_SERVER_NAME(X:Y)% is used in log format and host related options is specified, like HOST_FIRST, SNI_FIRST, it's possible to crash Envoy when the specified host header is missing in the request headers. This vulnerability is fixed in 1.37.5 and 1.38.3. A flaw was found in Envoy. This can lead to a crash of the Envoy proxy, resulting in a Denial of Service (DoS). Red Hat products ship Envoy versions prior to 1.37.0, which do not contain the vulnerable %REQUESTED_SERVER_NAME% host-related logging code introduced in 1.37.0. Red Hat products are therefore not affected by this vulnerability. Red Hat severity: Important — CVSS 7.5…
- Affected products in this advisory
- No product details extracted. Check the source bulletin.
- Source-reported affected versions
- Affected-version details not available in this record.
- Source-reported fixed versions
- 1.37.5
- 1.38.3
- Mitigation guidance
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
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