What’s Vulnerable › Vulnerabilities

CVE-2019-18836

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-11-11 · updated 2026-06-17
• Weakness: CWE-835

Description

Envoy 1.12.0 allows a remote denial of service because of resource loops, as demonstrated by a single idle TCP connection being able to keep a worker thread in an infinite busy loop when continue_on_listener_filters_timeout is used."

Affected products

• envoyproxy envoy: 1.12.0
• istio: from 1.3.0 through 1.3.3

References

• https://blog.envoyproxy.io
• https://github.com/envoyproxy/envoy/security/advisories/GHSA-3xvf-4396-cj46
• https://github.com/istio/istio/issues/18229
• https://groups.google.com/forum/#%21forum/envoy-users
• https://blog.envoyproxy.io
• https://github.com/envoyproxy/envoy/security/advisories/GHSA-3xvf-4396-cj46
• https://github.com/istio/istio/issues/18229
• https://groups.google.com/forum/#%21forum/envoy-users

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