SUSE-SU-2026:20904-1

This update for cosign fixes the following issues:

Update to version 3.0.5:

• CVE-2026-24122: Fixed improper validation of certificates that outlive expired CA certificates (bsc#1258542)
• CVE-2026-26958: Fixed filippo.io/edwards25519: failure to initialize receiver in MultiScalarMult can produce invalid results and lead to undefined behavior (bsc#1258612)
• CVE-2026-24137: Fixed github.com/sigstore/sigstore/pkg/tuf: legacy TUF client allows for arbitrary file writes with target cache path traversal (bsc#1257139)
• CVE-2026-22772: Fixed github.com/sigstore/fulcio: bypass MetaIssuer URL validation bypass can trigger SSRF to arbitrary internal services (bsc#1256562)
• CVE-2026-23991: Fixed github.com/theupdateframework/go-tuf/v2: denial of service due to invalid TUF metadata JSON returned by TUF repository (bsc#1257080)
• CVE-2026-23992: Fixed github.com/theupdateframework/go-tuf/v2: unauthorized modification to TUF metadata files due to a compromised or misconfigured TUF repository (bsc#1257085)
• CVE-2025-11065: Fixed github.com/go-viper/mapstructure/v2: sensitive Information leak in logs (bsc#1250620)
• CVE-2026-22703: Fixed that cosign verification accepts any valid Rekor entry under certain conditions (bsc#1256496)
• CVE-2025-58181: Fixed golang.org/x/crypto/ssh: invalidated number of mechanisms can cause unbounded memory consumption (bsc#1253913)