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TI-2019-09133 Aliases CVE-2019-12243GHSA-6g5f-f5pm-mjrg

Istio 1.1.x through 1.1.6 has Incorrect Access Control.

Priority LOW 35CWE-284Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and GitHub. Impact type from CWE-284.

Summary

Istio 1.1.x through 1.1.6 has Incorrect Access Control.

Why it matters now

EPSS 0.01175 67th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed istio.io/istio (Go): 1.1.7

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
—istio.io/istio (Go)1.1.0 to before 1.1.71.1.7Patch availableGHSA-6g5f-f5pm-mjrg
  • — Vendor— Affected all versions Fixed in — No fix listed CNA
  • istio.io/istio (Go) Vendor— Affected 1.1.0 to before 1.1.7 Fixed in 1.1.7 Patch available GHSA-6g5f-f5pm-mjrg

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:istio:istio:*:*:*:*:*:*:*:*1.1 – 1.1.6Vulnerableistio
  • cpe:2.3:a:istio:istio:*:*:*:*:*:*:*:* Versions 1.1 – 1.1.6 Vulnerable ·istio

Remediation

  • Fix · GHSA-6g5f-f5pm-mjrg istio.io/istio (Go) Fixed in 1.1.7 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-12243
  2. 2026-10-03 Alias added: GHSA-6g5f-f5pm-mjrg

References

Exploit 1

Advisory 2

Other 3

  • 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