PT-2026-35309 · Go · Istio.Io/Istio

Publicado 2026-04-16 · Atualizado 2026-04-16

OSV

CVSS v3.1

5.0

Média

Vetor base

AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

Impact

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.

Note: a partial mitigation for this was released in 1.29.1, 128.5, and 1.27.8; however, it was incomplete and missed a few codepaths. 1.29.2 and 1.28.6 contain the more robust fix.

Patches

Has the problem been patched? What versions should users upgrade to?

Workarounds

Users can deploy a ValidatingAdmissionPolicy to prevent the creation of RequestAuthentication resources with suspicious jwksUri field values (e.g. localhost, 127.0.0.0/8, 169.254.0.0/16, the ipv6 variants, etc.).

References

None

Correção

SSRF

Enumeração de Fraquezas

CWE-918

Identificadores relacionados

GHSA-FGW5-HP8F-XFHC

Produtos afetados

Istio.Io/Istio

Referências · 6

• https://github.com/istio/istio/security/advisories/GHSA-fgw5-hp8f-xfhc · Nota
• https://github.com/istio/istio · Nota
• https://github.com/istio/istio/releases/tag/1.28.6 · Nota
• https://github.com/istio/istio/releases/tag/1.29.2 · Nota
• https://osv.dev/vulnerability/GHSA-fgw5-hp8f-xfhc · Aviso do Fabricante
• https://nvd.nist.gov/vuln/detail/CVE-2026-41413 · Nota de Segurança