GHSA-XF85-363P-868W oras-go: Malicious registry can hijack Bearer token realm to exfiltrate credentials and refresh tokens

Summary oras-go's auth.Client follows the realm URL from a registry's WWW-Authenticate: Bearer challenge without validating its scheme or host. The realm field is server-controlled by design in the OCI/distribution spec — registries legitimately point token requests at a separate auth endpoint e....

GHSA-3P65-76G6-3W7R Distribution affected by pull-through cache credential exfiltration via www-authenticate bearer realm

hi guys, commit: 40594bd98e6d6ed993b5c6021c93fdf96d2e5851 as-of 2026-01-31 contact: GitHub Security Advisory https://github.com/distribution/distribution/security/advisories/new summary in pull-through cache mode, distribution discovers token auth endpoints by parsing WWW-Authenticate challenges...

Distribution affected by pull-through cache credential exfiltration via www-authenticate bearer realm

hi guys, commit: 40594bd98e6d6ed993b5c6021c93fdf96d2e5851 as-of 2026-01-31 contact: GitHub Security Advisory https://github.com/distribution/distribution/security/advisories/new summary in pull-through cache mode, distribution discovers token auth endpoints by parsing WWW-Authenticate challenges...

Server-side Request Forgery (SSRF)

Overview Affected versions of this package are vulnerable to Server-side Request Forgery SSRF in the process that parses WWW-Authenticate challenges from an upstream registry. An attacker can obtain upstream credentials by manipulating the bearer realm URL to redirect authentication requests to a...

Server-side Request Forgery (SSRF)

Overview Affected versions of this package are vulnerable to Server-side Request Forgery SSRF in the process that parses WWW-Authenticate challenges from an upstream registry. An attacker can obtain upstream credentials by manipulating the bearer realm URL to redirect authentication requests to a...

Server-side Request Forgery (SSRF)

Overview Affected versions of this package are vulnerable to Server-side Request Forgery SSRF in the process that parses WWW-Authenticate challenges from an upstream registry. An attacker can obtain upstream credentials by manipulating the bearer realm URL to redirect authentication requests to a...

Server-side Request Forgery (SSRF)

Overview Affected versions of this package are vulnerable to Server-side Request Forgery SSRF in the process that parses WWW-Authenticate challenges from an upstream registry. An attacker can obtain upstream credentials by manipulating the bearer realm URL to redirect authentication requests to a...

CVE-2026-33540

Distribution is a toolkit to pack, ship, store, and deliver container content. Prior to 3.1.0, in pull-through cache mode, distribution discovers token auth endpoints by parsing WWW-Authenticate challenges returned by the configured upstream registry. The realm URL from a bearer challenge is used...

CVE-2026-33540

CVE-2026-33540 affects the Distribution toolkit. In prior releases (before 3.1.0) and in pull-through cache mode, it parses WWW-Authenticate challenges to discover token auth endpoints, taking the realm URL from a bearer challenge without validating it against the upstream host. An attacker-contr...

CVE-2026-33540 Distribution affected by pull-through cache credential exfiltration via www-authenticate bearer realm

Distribution is a toolkit to pack, ship, store, and deliver container content. Prior to 3.1.0, in pull-through cache mode, distribution discovers token auth endpoints by parsing WWW-Authenticate challenges returned by the configured upstream registry. The realm URL from a bearer challenge is used...

CVE-2026-33540 Distribution affected by pull-through cache credential exfiltration via www-authenticate bearer realm

Distribution is a toolkit to pack, ship, store, and deliver container content. Prior to 3.1.0, in pull-through cache mode, distribution discovers token auth endpoints by parsing WWW-Authenticate challenges returned by the configured upstream registry. The realm URL from a bearer challenge is used...