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TI-2026-30013 Aliases CVE-2026-41413GHSA-fgw5-hp8f-xfhc

Istio Vulnerable to SSRF via RequestAuthentication jwksUri

Priority LOW 34CWE-918Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Partial Red Hat: 1 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-918 and the CVSS impact.

Summary

Istio is an open platform to connect, manage, and secure microservices. Prior to versions 1.28.6 and 1.29.2, when a RequestAuthentication resource is created with a jwksUri pointing to an internal service, istiod makes an unauthenticated HTTP GET request to that URL without filtering out localhost or link local ips. This can result in sensitive data being distributed to Envoy proxies via xDS configuration. This issue has been patched in versions 1.28.6 and 1.29.2.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00329 26th percentileScored 2026-11-07
Fix Partial istio (istio): 1.28.6, 1.29.2istio.io/istio (Go): 0.0.0-20260410004459-189832a289c1Red Hat: 1 without a fix

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
istioistiobefore 1.28.6; 1.29.0-alpha.0 to before 1.29.21.28.6, 1.29.2Patch availableCNA
—istio.io/istio (Go)before 0.0.0-20260410004459-189832a289c10.0.0-20260410004459-189832a289c1Patch availableGHSA-fgw5-hp8f-xfhc
  • istio Vendoristio Affected before 1.28.6; 1.29.0-alpha.0 to before 1.29.2 Fixed in 1.28.6, 1.29.2 Patch available CNA
  • istio.io/istio (Go) Vendor— Affected before 0.0.0-20260410004459-189832a289c1 Fixed in 0.0.0-20260410004459-189832a289c1 Patch available GHSA-fgw5-hp8f-xfhc

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:istio:istio:*:*:*:*:*:*:*:*before 1.28.6; 1.29.0 to before 1.29.2Vulnerableistio
  • cpe:2.3:a:istio:istio:*:*:*:*:*:*:*:* Versions before 1.28.6; 1.29.0 to before 1.29.2 Vulnerable ·istio

Remediation

  • Fix · CNA istio (istio) Fixed in 1.28.6, 1.29.2
  • Fix · GHSA-fgw5-hp8f-xfhc istio.io/istio (Go) Fixed in 0.0.0-20260410004459-189832a289c1 Advisory →

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
OpenShift Service Mesh 3AffectedNo fix planned: Out of support scope
Not affected: 1 product
  • OpenShift Service Mesh 2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-41413
  2. 2026-10-03 Alias added: GHSA-fgw5-hp8f-xfhc

References

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