CVE-2026-41413: Istio · SSRF via RequestAuthentication jwksUri
Affects istio.io/istioSource GCVE Database
Not known to be exploited · CVSS 5.0 Medium : upgrade to 0.0.0-20260410004459-189832a289c1 when convenient.
Data as of 27 Oct 2026, 00:07 UTC
- Patch
- Available – fixed in 0.0.0-20260410004459-189832a289c1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:NExploitation evidence
Disclosed: evidence found.
CVE published 7 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade istio.io/istio to 0.0.0-20260410004459-189832a289c1.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Goistio.io/istio | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
Description
### 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
References
- github.com/istio/istio/security/advisories/GHSA-fgw5-hp8f-xfhc (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2026-41413 (opens in a new tab)
- github.com/istio/istio (opens in a new tab)
- github.com/istio/istio/releases/tag/1.28.6 (opens in a new tab)
- github.com/istio/istio/releases/tag/1.29.2 (opens in a new tab)