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CVE-2026-47220

A flaw was found in Envoy. A remote attacker can exploit this vulnerability by sending a request with a missing host header when the `%REQUESTED_SERVER_NAME(X:Y)%` is used in the log format and host-related options, such as HOST_FIRST or SNI_FIRST, are specified. This can lead to a crash of the Envoy proxy, resulting in a Denial of Service (DoS).
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:2d5f37871bfcb6385c91b0652b44a63806e318234758ecb94ab5ff1448061a07
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
2

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 3 assertions

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:service_mesh:3"],"defaultStatus":"unaffected","packageName":"openshift-service-mesh/istio-proxyv2-rhel9","product":"OpenShift Service Mesh 3","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ec719e7c76f10f46343b3649bacad1acba971567ead5b242c4d078ec5b726b1e · sha256:d32c565f74195c3c… · /containers/adp/1/affected/1

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:service_mesh:2"],"defaultStatus":"unaffected","packageName":"openshift-service-mesh/proxyv2-rhel9","product":"OpenShift Service Mesh 2","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ec719e7c76f10f46343b3649bacad1acba971567ead5b242c4d078ec5b726b1e · sha256:d32c565f74195c3c… · /containers/adp/1/affected/0

{"product":"envoy","vendor":"envoyproxy","versions":[{"status":"affected","version":">= 1.38.0, < 1.38.3"},{"status":"affected","version":">= 1.37.0, < 1.37.5"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ec719e7c76f10f46343b3649bacad1acba971567ead5b242c4d078ec5b726b1e · sha256:d32c565f74195c3c… · /containers/cna/affected/0
cwe · 2 assertions

{"cweId":"CWE-476","description":"NULL Pointer Dereference","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ec719e7c76f10f46343b3649bacad1acba971567ead5b242c4d078ec5b726b1e · sha256:d32c565f74195c3c… · /containers/adp/1/problemTypes/0/descriptions/0

{"cweId":"CWE-476","description":"CWE-476: NULL Pointer Dereference","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ec719e7c76f10f46343b3649bacad1acba971567ead5b242c4d078ec5b726b1e · sha256:d32c565f74195c3c… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

3 source assertions
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:service_mesh:3"],"defaultStatus":"unaffected","packageName":"openshift-service-mesh/istio-proxyv2-rhel9","product":"OpenShift Service Mesh 3","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ec719e7c76f10f46343b3649bacad1acba971567ead5b242c4d078ec5b726b1e · sha256:d32c565f74195c3c… · /containers/adp/1/affected/1
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:service_mesh:2"],"defaultStatus":"unaffected","packageName":"openshift-service-mesh/proxyv2-rhel9","product":"OpenShift Service Mesh 2","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ec719e7c76f10f46343b3649bacad1acba971567ead5b242c4d078ec5b726b1e · sha256:d32c565f74195c3c… · /containers/adp/1/affected/0
{"product":"envoy","vendor":"envoyproxy","versions":[{"status":"affected","version":">= 1.38.0, < 1.38.3"},{"status":"affected","version":">= 1.37.0, < 1.37.5"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ec719e7c76f10f46343b3649bacad1acba971567ead5b242c4d078ec5b726b1e · sha256:d32c565f74195c3c… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:ec719e7c76f10f46343b3649bacad1acba971567ead5b242c4d078ec5b726b1e · sha256:d32c565f74195c3c… · /containers/adp/1/metrics/1/cvssV3_1
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:ec719e7c76f10f46343b3649bacad1acba971567ead5b242c4d078ec5b726b1e · sha256:d32c565f74195c3c… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-476","description":"NULL Pointer Dereference","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ec719e7c76f10f46343b3649bacad1acba971567ead5b242c4d078ec5b726b1e · sha256:d32c565f74195c3c… · /containers/adp/1/problemTypes/0/descriptions/0
{"cweId":"CWE-476","description":"CWE-476: NULL Pointer Dereference","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ec719e7c76f10f46343b3649bacad1acba971567ead5b242c4d078ec5b726b1e · sha256:d32c565f74195c3c… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions
{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-47220"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ec719e7c76f10f46343b3649bacad1acba971567ead5b242c4d078ec5b726b1e · sha256:d32c565f74195c3c… · /containers/adp/1/references/0
{"name":"RHBZ#2493652","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2493652"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ec719e7c76f10f46343b3649bacad1acba971567ead5b242c4d078ec5b726b1e · sha256:d32c565f74195c3c… · /containers/adp/1/references/1
{"tags":["exploit"],"url":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-j9wh-4qfm-wf2v"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ec719e7c76f10f46343b3649bacad1acba971567ead5b242c4d078ec5b726b1e · sha256:d32c565f74195c3c… · /containers/adp/0/references/0
{"name":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-j9wh-4qfm-wf2v","tags":["x_refsource_CONFIRM"],"url":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-j9wh-4qfm-wf2v"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ec719e7c76f10f46343b3649bacad1acba971567ead5b242c4d078ec5b726b1e · sha256:d32c565f74195c3c… · /containers/cna/references/0
{"tags":["x_sadp-csaf-vex"],"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-47220.json"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ec719e7c76f10f46343b3649bacad1acba971567ead5b242c4d078ec5b726b1e · sha256:d32c565f74195c3c… · /containers/adp/1/references/2

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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