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TI-2022-18762 Aliases CVE-2022-39388GHSA-6c6p-h79f-g6p4

Istio may allow identity impersonation if user has localhost access

Priority LOW 34CWE-863Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-863.

Summary

Istio is an open platform to connect, manage, and secure microservices. In versions on the 1.15.x branch prior to 1.15.3, a user can impersonate any workload identity within the service mesh if they have localhost access to the Istiod control plane. Version 1.15.3 contains a patch for this issue. There are no known workarounds.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00531 45th percentileScored 2026-11-07
Fix Fixed istio (istio): 1.15.3github.com/istio/istio (Go): 1.15.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
istioistio1.15.0-beta.0 to before 1.15.31.15.3Patch availableCNA
—github.com/istio/istio (Go)1.15.0-beta.0 to before 1.15.31.15.3Patch availableGHSA-6c6p-h79f-g6p4
  • istio Vendoristio Affected 1.15.0-beta.0 to before 1.15.3 Fixed in 1.15.3 Patch available CNA
  • github.com/istio/istio (Go) Vendor— Affected 1.15.0-beta.0 to before 1.15.3 Fixed in 1.15.3 Patch available GHSA-6c6p-h79f-g6p4

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:istio:istio:*:*:*:*:*:*:*:*1.15.0 – 1.15.2Vulnerableistio
  • cpe:2.3:a:istio:istio:*:*:*:*:*:*:*:* Versions 1.15.0 – 1.15.2 Vulnerable ·istio

Remediation

  • Fix · CNA istio (istio) Fixed in 1.15.3
  • Fix · GHSA-6c6p-h79f-g6p4 github.com/istio/istio (Go) Fixed in 1.15.3 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-39388
  2. 2026-10-03 Alias added: GHSA-6c6p-h79f-g6p4

References

Patch 2

Advisory 3

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-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