Summary
Talos Linux: Support bundle does not redact registry credentials
When generating a support bundle with talosctl support the credentials entered for private registries are included in the bundle.
Details
Within the generated support bundle, inside resources/registryconfigs.cri.talos.dev.yaml the auth field of the spec is retained.
The same, potentially sensitive information is present within etcfilespecs.files.talos.dev.yaml.
PoC
Simply run talosctl -n [...] support on a cluster with a RegistryAuthConfig resource
Notes
Talos 1.14+ by default encrypts the support bundle to the age recipients specified (defaulting to siderolabs GitHub org members), so the impact is even lower.
Environment
- Talos version: v1.13.0
- Kubernetes version: 1.35.3
- Platform: amd64
Impact
The problem itself is minor, however, anyone who has ever uploaded a support.zip bundle on a github issue, slack thread or public forum could have potentially leaked their internal authentication parameters for a private registry.
In most situations, if the network and credentials are set correctly, this should not be a problem. On the other hand, if the affected registry is publicly accessible, and the provided credentials have write access to it, this could lead to possibly serious consequences, from denial of service, to data loss and possibly existing tag hijacking leading to supply chain compromise, for the affected parties which were under the impression that the support bundle is redacted of sensitive information and thus can be shared publicly.
CVE-2026-77564 has a CVSS score of 3.3 (Low). The vector is requires local access, no privileges required, and user interaction required. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (1.14.0-alpha.0.0.20260513110206-76080416beee); upgrading removes the vulnerable code path.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
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Frequently Asked Questions
- What is CVE-2026-77564? CVE-2026-77564 is a low-severity security vulnerability in github.com/siderolabs/talos (go), affecting versions < 1.14.0-alpha.0.0.20260513110206-76080416beee. It is fixed in 1.14.0-alpha.0.0.20260513110206-76080416beee.
- How severe is CVE-2026-77564? CVE-2026-77564 has a CVSS score of 3.3 (Low). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
- Which versions of github.com/siderolabs/talos are affected by CVE-2026-77564? github.com/siderolabs/talos (go) versions < 1.14.0-alpha.0.0.20260513110206-76080416beee is affected.
- Is there a fix for CVE-2026-77564? Yes. CVE-2026-77564 is fixed in 1.14.0-alpha.0.0.20260513110206-76080416beee. Upgrade to this version or later.
- Is CVE-2026-77564 exploitable, and should I be worried? Whether CVE-2026-77564 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether CVE-2026-77564 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix CVE-2026-77564? Upgrade
github.com/siderolabs/talosto 1.14.0-alpha.0.0.20260513110206-76080416beee or later.