EUVD-2026-28315Published

Istio Vulnerable to SSRF via RequestAuthentication jwksUri

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cve-program · CVE-2026-41413

Published

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.

Source published: 7 May 2026 04:18:32 UTC
Source modified: 7 May 2026 12:59:35 UTC
Saved here: 23 Oct 2026 15:48:27 UTC
Source terms: CVE Program Terms of Use

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CVSS 3.1 · 5.0 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

euvd · EUVD-2026-28315

Published

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EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

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datePublished: May 7, 2026, 4:18:32 AM

dateUpdated: May 7, 2026, 12:59:35 PM

Source published: May 7, 2026, 4:18:32 AM (timezone not stated)
Source modified: May 7, 2026, 12:59:35 PM (timezone not stated)
Saved here: 15 Nov 2026 12:05:56 UTC
Source terms: ENISA EUVD · source terms and attribution apply

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EUVD CVSS 3.1 · 5.0 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

nvd · CVE-2026-41413

Published

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NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Analyzed

Weakness classifications: CWE-918

Original publisher date fields

published: 2026-05-07T06:16:04.730

lastModified: 2026-11-11T23:10:00.263

1 source CPE criteria · context only

cpe:2.3:a:istio:istio:*:*:*:*:*:*:*:*

The original JSON retains the logical configuration operators, exclusions and version bounds.

Source published: 7 May 2026 06:16:04 UTC
Source modified: 11 Nov 2026 23:10:00 UTC
Saved here: 12 Nov 2026 15:19:01 UTC
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CVSS 3.1 · [email protected] · Secondary · 5.0 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

CVSS 3.1 · [email protected] · Primary · 7.7 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

osv · 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

Source published: 16 Apr 2026 21:38:09 UTC
Source modified: 10 Sep 2026 03:50:44 UTC
Saved here: 24 Oct 2026 13:19:41 UTC
Source terms: GitHub Advisory Database · CC-BY-4.0

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CVSS_V3 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

Publisher rating · MODERATE

osv · GO-2026-5363

Published

Istio: SSRF via RequestAuthentication jwksUri in istio.io/istio

Source published: 25 Jun 2026 18:43:19 UTC
Source modified: 28 Jun 2026 22:29:42 UTC
Saved here: 24 Oct 2026 13:19:41 UTC
Source terms: OSV · upstream source license applies

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