Istio Vulnerable to SSRF via RequestAuthentication jwksUri
cve-program · CVE-2026-41413
PublishedIstio 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.
Read the publisher's advisoryeuvd · EUVD-2026-28315
PublishedIstio 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.
Read the publisher's advisorynvd · CVE-2026-41413
PublishedIstio 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.
Read the publisher's advisoryosv · GHSA-fgw5-hp8f-xfhc
Published### 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
Read the publisher's advisoryosv · GO-2026-5363
PublishedIstio: SSRF via RequestAuthentication jwksUri in istio.io/istio
Read the publisher's advisoryAffected versions, risk and source history
Related advisories and sources
Publishers link these advisories through the identifiers shown below. A shared identifier or date alone does not tell you whether your software is affected or whether the advisories describe the same cause.
CVE-2026-41413 · CVE overview and exploitation status
cve-program · CVE-2026-41413
- https://github.com/istio/istio/security/advisories/GHSA-fgw5-hp8f-xfhc
- https://github.com/istio/istio/releases/tag/1.28.6
- https://github.com/istio/istio/releases/tag/1.29.2
euvd · EUVD-2026-28315
- https://github.com/istio/istio/security/advisories/GHSA-fgw5-hp8f-xfhc
- https://github.com/istio/istio/releases/tag/1.28.6
- https://github.com/istio/istio/releases/tag/1.29.2
nvd · CVE-2026-41413
- https://github.com/istio/istio/releases/tag/1.28.6
- https://github.com/istio/istio/releases/tag/1.29.2
- https://github.com/istio/istio/security/advisories/GHSA-fgw5-hp8f-xfhc
osv · GHSA-fgw5-hp8f-xfhc
- https://github.com/istio/istio/security/advisories/GHSA-fgw5-hp8f-xfhc
- https://nvd.nist.gov/vuln/detail/CVE-2026-41413
- https://github.com/istio/istio
- https://github.com/istio/istio/releases/tag/1.28.6
- https://github.com/istio/istio/releases/tag/1.29.2
osv · GO-2026-5363
Related changes
Linked by CVE identifierNo related changes are available here.