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TI-2019-13538 Aliases CVE-2019-18801GHSA-288h-hv2q-fwrv

An issue was discovered in Envoy 1.12.0.

Priority MEDIUM 47CWE-787Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-787 and the CVSS impact.

Summary

An issue was discovered in Envoy 1.12.0. An untrusted remote client may send HTTP/2 requests that write to the heap outside of the request buffers when the upstream is HTTP/1. This may be used to corrupt nearby heap contents (leading to a query-of-death scenario) or may be used to bypass Envoy's access control mechanisms such as path based routing. An attacker can also modify requests from other users that happen to be proximal temporally and spatially.

Why it matters now

EPSS 0.02502 84th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Red Hat: 1 advisory

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*up to 1.12.1Vulnerableenvoyproxy
  • cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* Versions up to 1.12.1 Vulnerable ·envoyproxy

Remediation

Red Hat 1 advisory

  • RHSA-2019:4222 Released 2019-12-11 · Red Hat rating Critical
    Red Hat OpenShift Service Mesh 1.0.3 RPMs security update
    • OpenShift Service Mesh 1.0 servicemesh-1.0.3-1.el8, servicemesh-citadel-1.0.3-1.el8, servicemesh-cni-1.0.3-1.el8 +12
    • Red Hat OpenShift Service Mesh 1.0 kiali-v1.0.8.redhat1-1.el7

Vendor assessments

Red Hat

Red Hat rating: Critical. Red Hat's page for this CVE →

ProductStatusPlan or fix
OpenShift Service Mesh 1.0Fixed RHSA-2019:4222
Red Hat OpenShift Service Mesh 1.0Fixed RHSA-2019:4222

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-18801
  2. 2026-10-03 Alias added: GHSA-288h-hv2q-fwrv

References

Exploit 1

Patch 1

Advisory 1

Other 2

  • TI-2026-79288 Out-of-bounds write in Google Brotli decoder KEVCVSS 4.0CRITICAL 9.2
  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
  • TI-2024-20001 HTTP/2: CPU exhaustion due to CONTINUATION frame flood CVSS 3.1HIGH 7.5
  • TI-2024-18524 HTTP/2: memory exhaustion due to CONTINUATION frame flood CVSS 3.1HIGH 7.5
  • TI-2023-12215 Envoy client may fake the header `x-envoy-original-path` CVSS 3.1CRITICAL 9.1
  • TI-2023-18002 Envoy vulnerable to OAuth2 credentials exploit with permanent validity CVSS 3.1CRITICAL 9.8
See all 126 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences