- fluentd-gcp is unchanged at v3.2.0 since Kubernetes 1.13 ([#70954](https://github.com/kubernetes/kubernetes/pull/70954))
- OIDC authentication is unchanged at coreos/go-oidc v2 since Kubernetes 1.10 ([#58544](https://github.com/kubernetes/kubernetes/pull/58544))
- Calico is unchanged at v3.3.1 since Kubernetes 1.13 ([#70932](https://github.com/kubernetes/kubernetes/pull/70932))

- Resolves an issue with the "ServiceAccountIssuerDiscovery should support OIDC discovery" conformance test failing on clusters which are configured with issuers outside the cluster ([#101725](https://github.com/kubernetes/kubernetes/pull/101725), [@mtaufen](https://github.com/mtaufen)) [SIG Auth and Testing]

- fluentd-gcp has been updated to v3.2.0 ([#70954](https://github.com/kubernetes/kubernetes/pull/70954))
- OIDC authentication is unchanged at coreos/go-oidc v2 since Kubernetes 1.10 ([#58544](https://github.com/kubernetes/kubernetes/pull/58544))
- Calico was updated to v3.3.1 ([#70932](https://github.com/kubernetes/kubernetes/pull/70932))

- Ingress glbc is unchanged from 1.10: v1.0.0 ([#61302](https://github.com/kubernetes/kubernetes/pull/61302))
- OIDC authentication is unchanged from 1.10: coreos/go-oidc v2 ([#58544](https://github.com/kubernetes/kubernetes/pull/58544))
- Calico is unchanged from 1.10: v2.6.7 ([#59130](https://github.com/kubernetes/kubernetes/pull/59130))

- Kube-apiserver: Fixed OIDC discovery document publishing when external service account token signing was enabled. ([#131493](https://github.com/kubernetes/kubernetes/pull/131493), [@hoskeri](https://github.com/hoskeri)) [SIG API Machinery, Auth and Testing]

### API Change

- '`kube-apiserver`: adds `--authentication-config` flag for reading `AuthenticationConfiguration`
  files. `--authentication-config` flag is mutually exclusive with the existing `--oidc-*`
  flags.' ([#119142](https://github.com/kubernetes/kubernetes/pull/119142), [@aramase](https://github.com/aramase))
- '`kube-scheduler` component config (`KubeSchedulerConfiguration`) `kubescheduler.config.k8s.io/v1beta3`

- Resolves an issue with the "ServiceAccountIssuerDiscovery should support OIDC discovery" conformance test failing on clusters which are configured with issuers outside the cluster ([#101589](https://github.com/kubernetes/kubernetes/pull/101589), [@mtaufen](https://github.com/mtaufen)) [SIG Auth and Testing]

        }
    }

    @Test
    @DisplayName("OID values have valid dotted numeric format")
    void oidFormat() {
        assertAll(() -> assertTrue(OID_PATTERN.matcher(SpnegoConstants.SPNEGO_MECHANISM).matches(), "Invalid OID: SPNEGO_MECHANISM"),
                () -> assertTrue(OID_PATTERN.matcher(SpnegoConstants.KERBEROS_MECHANISM).matches(), "Invalid OID: KERBEROS_MECHANISM"),

* Bug fixes:

  * Make gcp auth provider not to override the Auth header if it's already exits ([#45575](https://github.com/kubernetes/kubernetes/pull/45575), [@wanghaoran1988](https://github.com/wanghaoran1988))

  * The oidc client plugin has reduce round trips and fix scopes requested ([#45317](https://github.com/kubernetes/kubernetes/pull/45317), [@ericchiang](https://github.com/ericchiang))

    @MethodSource("supportedMechs")
    @DisplayName("isSupported returns true for supported OIDs")
    void isSupported_supportedOids(ASN1ObjectIdentifier oid) {
        assertTrue(ctx.isSupported(oid));
        assertTrue(ctx.isPreferredMech(oid));
    }

    @Test
    @DisplayName("isSupported returns false for null/unknown OIDs")
    void isSupported_unknownOrNull() {
        assertFalse(ctx.isSupported(null));