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CVE-2026-47774

A denial-of-service vulnerability was found in Envoy's HTTP/2 HPACK header compression implementation. A remote attacker could send a specially crafted HTTP/2 request that triggers disproportionately large memory allocations on the server, leading to resource exhaustion and denial of service.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:0d7630519640b12b91436496de0f122c66b198d44bc8df2e2504bbf0b2828ee5
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
2

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 6 assertions

{"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:service_mesh:3.3::el9"],"defaultStatus":"affected","packageName":"openshift-service-mesh/istio-proxyv2-rhel9","product":"Red Hat OpenShift Service Mesh 3.3","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"1781094520","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:dc359878ad44600a520996d0307df5b8ba0f74e7b9a274774e27a68df2af5ea4 · sha256:c68cb6838ac7e9b3… · /containers/adp/2/affected/4

{"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:service_mesh:3.1::el9"],"defaultStatus":"affected","packageName":"openshift-service-mesh/istio-proxyv2-rhel9","product":"Red Hat OpenShift Service Mesh 3.1","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"1781070158","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:dc359878ad44600a520996d0307df5b8ba0f74e7b9a274774e27a68df2af5ea4 · sha256:c68cb6838ac7e9b3… · /containers/adp/2/affected/2

{"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:service_mesh:2.6::el9"],"defaultStatus":"affected","packageName":"openshift-service-mesh/proxyv2-rhel9","product":"Red Hat OpenShift Service Mesh 2.6","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"1781604724","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:dc359878ad44600a520996d0307df5b8ba0f74e7b9a274774e27a68df2af5ea4 · sha256:c68cb6838ac7e9b3… · /containers/adp/2/affected/0

{"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:service_mesh:3.2::el9"],"defaultStatus":"affected","packageName":"openshift-service-mesh/istio-proxyv2-rhel9","product":"Red Hat OpenShift Service Mesh 3.2","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"1781070967","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:dc359878ad44600a520996d0307df5b8ba0f74e7b9a274774e27a68df2af5ea4 · sha256:c68cb6838ac7e9b3… · /containers/adp/2/affected/3

{"product":"envoy","vendor":"envoyproxy","versions":[{"status":"affected","version":"< 1.35.11"},{"status":"affected","version":">= 1.36.0, < 1.36.7"},{"status":"affected","version":">= 1.37.0, < 1.37.3"},{"status":"affected","version":">= 1.38.0, < 1.38.1"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:dc359878ad44600a520996d0307df5b8ba0f74e7b9a274774e27a68df2af5ea4 · sha256:c68cb6838ac7e9b3… · /containers/cna/affected/0

{"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:service_mesh:3.0::el9"],"defaultStatus":"affected","packageName":"openshift-service-mesh/istio-proxyv2-rhel9","product":"Red Hat OpenShift Service Mesh 3.0","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"1781069908","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:dc359878ad44600a520996d0307df5b8ba0f74e7b9a274774e27a68df2af5ea4 · sha256:c68cb6838ac7e9b3… · /containers/adp/2/affected/1
cwe · 3 assertions

{"cweId":"CWE-770","description":"CWE-770: Allocation of Resources Without Limits or Throttling","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:dc359878ad44600a520996d0307df5b8ba0f74e7b9a274774e27a68df2af5ea4 · sha256:c68cb6838ac7e9b3… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-405","description":"CWE-405: Asymmetric Resource Consumption (Amplification)","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:dc359878ad44600a520996d0307df5b8ba0f74e7b9a274774e27a68df2af5ea4 · sha256:c68cb6838ac7e9b3… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-409","description":"Improper Handling of Highly Compressed Data (Data Amplification)","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:dc359878ad44600a520996d0307df5b8ba0f74e7b9a274774e27a68df2af5ea4 · sha256:c68cb6838ac7e9b3… · /containers/adp/2/problemTypes/0/descriptions/0

Affected products and versions

6 source assertions
{"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:service_mesh:3.3::el9"],"defaultStatus":"affected","packageName":"openshift-service-mesh/istio-proxyv2-rhel9","product":"Red Hat OpenShift Service Mesh 3.3","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"1781094520","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:dc359878ad44600a520996d0307df5b8ba0f74e7b9a274774e27a68df2af5ea4 · sha256:c68cb6838ac7e9b3… · /containers/adp/2/affected/4
{"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:service_mesh:3.1::el9"],"defaultStatus":"affected","packageName":"openshift-service-mesh/istio-proxyv2-rhel9","product":"Red Hat OpenShift Service Mesh 3.1","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"1781070158","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:dc359878ad44600a520996d0307df5b8ba0f74e7b9a274774e27a68df2af5ea4 · sha256:c68cb6838ac7e9b3… · /containers/adp/2/affected/2
{"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:service_mesh:2.6::el9"],"defaultStatus":"affected","packageName":"openshift-service-mesh/proxyv2-rhel9","product":"Red Hat OpenShift Service Mesh 2.6","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"1781604724","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:dc359878ad44600a520996d0307df5b8ba0f74e7b9a274774e27a68df2af5ea4 · sha256:c68cb6838ac7e9b3… · /containers/adp/2/affected/0
{"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:service_mesh:3.2::el9"],"defaultStatus":"affected","packageName":"openshift-service-mesh/istio-proxyv2-rhel9","product":"Red Hat OpenShift Service Mesh 3.2","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"1781070967","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:dc359878ad44600a520996d0307df5b8ba0f74e7b9a274774e27a68df2af5ea4 · sha256:c68cb6838ac7e9b3… · /containers/adp/2/affected/3
{"product":"envoy","vendor":"envoyproxy","versions":[{"status":"affected","version":"< 1.35.11"},{"status":"affected","version":">= 1.36.0, < 1.36.7"},{"status":"affected","version":">= 1.37.0, < 1.37.3"},{"status":"affected","version":">= 1.38.0, < 1.38.1"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:dc359878ad44600a520996d0307df5b8ba0f74e7b9a274774e27a68df2af5ea4 · sha256:c68cb6838ac7e9b3… · /containers/cna/affected/0
{"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:service_mesh:3.0::el9"],"defaultStatus":"affected","packageName":"openshift-service-mesh/istio-proxyv2-rhel9","product":"Red Hat OpenShift Service Mesh 3.0","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"1781069908","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:dc359878ad44600a520996d0307df5b8ba0f74e7b9a274774e27a68df2af5ea4 · sha256:c68cb6838ac7e9b3… · /containers/adp/2/affected/1

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:dc359878ad44600a520996d0307df5b8ba0f74e7b9a274774e27a68df2af5ea4 · sha256:c68cb6838ac7e9b3… · /containers/cna/metrics/0/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:dc359878ad44600a520996d0307df5b8ba0f74e7b9a274774e27a68df2af5ea4 · sha256:c68cb6838ac7e9b3… · /containers/adp/2/metrics/1/cvssV3_1

CWE assertions

3 source assertions
{"cweId":"CWE-770","description":"CWE-770: Allocation of Resources Without Limits or Throttling","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:dc359878ad44600a520996d0307df5b8ba0f74e7b9a274774e27a68df2af5ea4 · sha256:c68cb6838ac7e9b3… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-405","description":"CWE-405: Asymmetric Resource Consumption (Amplification)","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:dc359878ad44600a520996d0307df5b8ba0f74e7b9a274774e27a68df2af5ea4 · sha256:c68cb6838ac7e9b3… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-409","description":"Improper Handling of Highly Compressed Data (Data Amplification)","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:dc359878ad44600a520996d0307df5b8ba0f74e7b9a274774e27a68df2af5ea4 · sha256:c68cb6838ac7e9b3… · /containers/adp/2/problemTypes/0/descriptions/0

Source references

10 source assertions
{"url":"http://www.openwall.com/lists/oss-security/2026/06/04/15"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:dc359878ad44600a520996d0307df5b8ba0f74e7b9a274774e27a68df2af5ea4 · sha256:c68cb6838ac7e9b3… · /containers/adp/0/references/0
{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:26210"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:dc359878ad44600a520996d0307df5b8ba0f74e7b9a274774e27a68df2af5ea4 · sha256:c68cb6838ac7e9b3… · /containers/adp/2/references/4
{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:26222"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:dc359878ad44600a520996d0307df5b8ba0f74e7b9a274774e27a68df2af5ea4 · sha256:c68cb6838ac7e9b3… · /containers/adp/2/references/5
{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:26231"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:dc359878ad44600a520996d0307df5b8ba0f74e7b9a274774e27a68df2af5ea4 · sha256:c68cb6838ac7e9b3… · /containers/adp/2/references/6
{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:26247"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:dc359878ad44600a520996d0307df5b8ba0f74e7b9a274774e27a68df2af5ea4 · sha256:c68cb6838ac7e9b3… · /containers/adp/2/references/7
{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:27114"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:dc359878ad44600a520996d0307df5b8ba0f74e7b9a274774e27a68df2af5ea4 · sha256:c68cb6838ac7e9b3… · /containers/adp/2/references/3
{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-47774"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:dc359878ad44600a520996d0307df5b8ba0f74e7b9a274774e27a68df2af5ea4 · sha256:c68cb6838ac7e9b3… · /containers/adp/2/references/0
{"name":"RHBZ#2487465","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2487465"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:dc359878ad44600a520996d0307df5b8ba0f74e7b9a274774e27a68df2af5ea4 · sha256:c68cb6838ac7e9b3… · /containers/adp/2/references/1
{"name":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-22m2-hvr2-xqc8","tags":["x_refsource_CONFIRM"],"url":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-22m2-hvr2-xqc8"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:dc359878ad44600a520996d0307df5b8ba0f74e7b9a274774e27a68df2af5ea4 · sha256:c68cb6838ac7e9b3… · /containers/cna/references/0
{"tags":["x_sadp-csaf-vex"],"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-47774.json"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:dc359878ad44600a520996d0307df5b8ba0f74e7b9a274774e27a68df2af5ea4 · sha256:c68cb6838ac7e9b3… · /containers/adp/2/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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