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CVE-2026-47205

Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.36.0 until 1.36.9, 1.37.5, and 1.38.3, a Use-After-Free (UAF) vulnerability leading to a sudden segmentation fault exists in Envoy's ext_authz HTTP filter when processing per-route authorization overrides concurrently with rapid downstream client disconnects. During standard request lifecycles, Envoy instantiates the ext_authz filter with a foundational authorization client object (client_). If a matche
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:5858098aa1d437915331ffc8dd18a9160697bb2e0187229dd3a7977b9647adbb
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"envoy","vendor":"envoyproxy","versions":[{"status":"affected","version":">= 1.38.0, < 1.38.3"},{"status":"affected","version":">= 1.37.0, < 1.37.5"},{"status":"affected","version":">= 1.36.0, < 1.36.9"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e52b1a984861364a2dcac7c731e5e6bb475d91ff25c1b3097f61b2c1dbaef9e7 · sha256:c06fa220042c957f… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":5.9,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/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:e52b1a984861364a2dcac7c731e5e6bb475d91ff25c1b3097f61b2c1dbaef9e7 · sha256:c06fa220042c957f… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-416","description":"CWE-416: Use After Free","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e52b1a984861364a2dcac7c731e5e6bb475d91ff25c1b3097f61b2c1dbaef9e7 · sha256:c06fa220042c957f… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"tags":["exploit"],"url":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-mvh9-767w-x47j"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e52b1a984861364a2dcac7c731e5e6bb475d91ff25c1b3097f61b2c1dbaef9e7 · sha256:c06fa220042c957f… · /containers/adp/0/references/0
{"name":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-mvh9-767w-x47j","tags":["x_refsource_CONFIRM"],"url":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-mvh9-767w-x47j"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e52b1a984861364a2dcac7c731e5e6bb475d91ff25c1b3097f61b2c1dbaef9e7 · sha256:c06fa220042c957f… · /containers/cna/references/0

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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