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TI-2020-08638 Aliases CVE-2020-10739GHSA-wr89-rp47-qc87

NULL pointer dereference in istio.io istio/envoy

Priority LOW 37CWE-476Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-476.

Summary

Istio 1.4.x before 1.4.9 and Istio 1.5.x before 1.5.4 contain the following vulnerability when telemetry v2 is enabled: by sending a specially crafted packet, an attacker could trigger a Null Pointer Exception resulting in a Denial of Service. This could be sent to the ingress gateway or a sidecar, triggering a null pointer exception which results in a denial of service. This also affects servicemesh-proxy where a null pointer exception flaw was found in servicemesh-proxy. When running Telemetry v2 (not on by default in version 1.4.x), an attacker could send a specially crafted packet to the ingress gateway or proxy sidecar, triggering a denial of service.

Why it matters now

EPSS 0.02389 84th percentileScored 2026-11-07
Fix Fixed istio/envoy (istio.io): 1.4.9, 1.5.4Red Hat: 1 advisory

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
istio.ioistio/envoy1.4.0 to before 1.4.9; 1.5.0 to before 1.5.41.4.9, 1.5.4Patch availableCNA
  • istio/envoy Vendoristio.io Affected 1.4.0 to before 1.4.9; 1.5.0 to before 1.5.4 Fixed in 1.4.9, 1.5.4 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:istio:istio:*:*:*:*:*:*:*:*1.4.0 to before 1.4.9; 1.5.0 to before 1.5.4Vulnerableistio
  • cpe:2.3:a:istio:istio:*:*:*:*:*:*:*:* Versions 1.4.0 to before 1.4.9; 1.5.0 to before 1.5.4 Vulnerable ·istio

Remediation

  • Fix · CNA istio/envoy (istio.io) Fixed in 1.4.9, 1.5.4

Red Hat 1 advisory

  • RHSA-2020:2148 Released 2020-05-13 · Red Hat rating Important
    Red Hat OpenShift Service Mesh 1.1.2 Service Mesh Proxy security update
    • OpenShift Service Mesh 1.1 servicemesh-proxy-1.1.2-2.el8

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
OpenShift Service Mesh 1.1Fixed RHSA-2020:2148

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-10739
  2. 2026-10-03 Alias added: GHSA-wr89-rp47-qc87

References

Patch 1

Advisory 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-2022-06055 Authorization Policy bypass in Istio CVSS 3.1CRITICAL 9.8
  • TI-2021-11909 Istio before 1.8.6 and 1.9.x before 1.9.5 contains a remotely exploitable vulnerability… CVSS 3.1CRITICAL 9.8
  • TI-2026-24390 Istio JWKS resolver to prevent private key material from being exposed when JWKS fetch fails. CVSS 4.0HIGH 8.7
  • TI-2022-13090 Ill-formed headers may lead to unexpected behavior in Istio CVSS 3.1CRITICAL 9.8
See all 28 →

Sources

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