cosign Kubernetes, CI & IaC
Shell-less Sigstore Cosign container signing & verification, built from source via melange.
Pull this image
docker pull ghcr.io/rtvkiz/minimal-cosign:latestdocker pull ghcr.io/rtvkiz/minimal-cosign:latest-devThe -dev variant adds a shell, package manager and build toolchain. For CI and debugging — not production.
Details
- Repository
- ghcr.io/rtvkiz/minimal-cosign
- Size (compressed)
- 95 MB
- Built
- 2026-09-29T00:34:51Z (today)
- Architectures
- x86_64, aarch64
- Primary package
- cosign
- Entrypoint
- /usr/bin/cosign
- User
- nonroot (65532)
- Working dir
- /workspace
- Architectures
- x86_64, aarch64
- Environment
- Labels
-
org.opencontainers.image.title minimal-cosign org.opencontainers.image.description Hardened shell-less Sigstore Cosign (container signing & verification) built from source via melange with daily CVE patches org.opencontainers.image.url https://github.com/rtvkiz/minimal org.opencontainers.image.source https://github.com/rtvkiz/minimal/tree/main/images/cosign org.opencontainers.image.licenses Apache-2.0
- Entrypoint
- /usr/bin/cosign
- User
- nonroot (65532)
- Working dir
- /workspace
- Architectures
- x86_64, aarch64
- Environment
- Labels
-
org.opencontainers.image.title minimal-cosign-dev org.opencontainers.image.description Dev variant of minimal-cosign: same cosign + shell + curl/openssl/dig/jq/git. Not for production. org.opencontainers.image.url https://github.com/rtvkiz/minimal org.opencontainers.image.source https://github.com/rtvkiz/minimal/tree/main/images/cosign org.opencontainers.image.licenses Apache-2.0 dev.minimal.variant dev
| Tag | Pull | Published |
|---|---|---|
| 3 | ghcr.io/rtvkiz/minimal-cosign:3 | 2026-09-29 |
| 3.1 | ghcr.io/rtvkiz/minimal-cosign:3.1 | 2026-09-29 |
| 3.1.3-r0 | ghcr.io/rtvkiz/minimal-cosign:3.1.3-r0 | 2026-09-29 |
| 3.1.3-r0-20260929 | ghcr.io/rtvkiz/minimal-cosign:3.1.3-r0-20260929 | 2026-09-29 |
| latest | ghcr.io/rtvkiz/minimal-cosign:latest | 2026-09-29 |
| 3-dev | ghcr.io/rtvkiz/minimal-cosign:3-dev | 2026-09-29 |
| 3.1-dev | ghcr.io/rtvkiz/minimal-cosign:3.1-dev | 2026-09-29 |
| 3.1.3-r0-20260929-dev | ghcr.io/rtvkiz/minimal-cosign:3.1.3-r0-20260929-dev | 2026-09-29 |
| 3.1.3-r0-dev | ghcr.io/rtvkiz/minimal-cosign:3.1.3-r0-dev | 2026-09-29 |
| latest-dev | ghcr.io/rtvkiz/minimal-cosign:latest-dev | 2026-09-29 |
| 3.1.3-r0-20260928 | ghcr.io/rtvkiz/minimal-cosign:3.1.3-r0-20260928 | 2026-09-28 |
| 3.1.3-r0-20260928-dev | ghcr.io/rtvkiz/minimal-cosign:3.1.3-r0-20260928-dev | 2026-09-28 |
| 3.1.3-r0-20260927 | ghcr.io/rtvkiz/minimal-cosign:3.1.3-r0-20260927 | 2026-09-27 |
| 3.1.3-r0-20260927-dev | ghcr.io/rtvkiz/minimal-cosign:3.1.3-r0-20260927-dev | 2026-09-27 |
| 3.1.3-r0-20260926 | ghcr.io/rtvkiz/minimal-cosign:3.1.3-r0-20260926 | 2026-09-26 |
| 3.1.3-r0-20260926-dev | ghcr.io/rtvkiz/minimal-cosign:3.1.3-r0-20260926-dev | 2026-09-26 |
| 3.1.3-r0-20260925 | ghcr.io/rtvkiz/minimal-cosign:3.1.3-r0-20260925 | 2026-09-25 |
| 3.1.3-r0-20260925-dev | ghcr.io/rtvkiz/minimal-cosign:3.1.3-r0-20260925-dev | 2026-09-25 |
| 3.1.3-r0-20260924 | ghcr.io/rtvkiz/minimal-cosign:3.1.3-r0-20260924 | 2026-09-24 |
| 3.1.3-r0-20260924-dev | ghcr.io/rtvkiz/minimal-cosign:3.1.3-r0-20260924-dev | 2026-09-24 |
| 3.1.3-r0-20260923 | ghcr.io/rtvkiz/minimal-cosign:3.1.3-r0-20260923 | 2026-09-23 |
| 3.1.3-r0-20260923-dev | ghcr.io/rtvkiz/minimal-cosign:3.1.3-r0-20260923-dev | 2026-09-23 |
| 3.1.3-r0-20260922 | ghcr.io/rtvkiz/minimal-cosign:3.1.3-r0-20260922 | 2026-09-22 |
| 3.1.3-r0-20260922-dev | ghcr.io/rtvkiz/minimal-cosign:3.1.3-r0-20260922-dev | 2026-09-22 |
| 3.1.3-r0-20260921 | ghcr.io/rtvkiz/minimal-cosign:3.1.3-r0-20260921 | 2026-09-21 |
| 3.1.3-r0-20260921-dev | ghcr.io/rtvkiz/minimal-cosign:3.1.3-r0-20260921-dev | 2026-09-21 |
| 3.1.3-r0-20260920 | ghcr.io/rtvkiz/minimal-cosign:3.1.3-r0-20260920 | 2026-09-20 |
| 3.1.3-r0-20260920-dev | ghcr.io/rtvkiz/minimal-cosign:3.1.3-r0-20260920-dev | 2026-09-20 |
| 3.1.3-r0-20260919 | ghcr.io/rtvkiz/minimal-cosign:3.1.3-r0-20260919 | 2026-09-19 |
| 3.1.3-r0-20260919-dev | ghcr.io/rtvkiz/minimal-cosign:3.1.3-r0-20260919-dev | 2026-09-19 |
14 packages in the image, resolved from the SPDX SBOM.
| Package | Version | License |
|---|---|---|
| alpine/ca-certificates | 20260909 | MPL-2.0 AND MIT |
| ca-certificates-bundle | 20260909-r1 | MPL-2.0 AND MIT |
| ca-certificates-bundle | 20260909-r1 | (MPL-2.0 AND MIT) |
| ca-certificates-bundle | 20260909-r1 | — |
| ca-certificates.yaml | ee3eac73dda22e8dd32fa5fb3e3a1712a6e812d7 | Apache-2.0 |
| cosign | 3.1.3-r0 | Apache-2.0 |
| images/cosign/melange.yaml | 1bce6e63ea891bcced1fda6bdc6813ced3474c4e | — |
| sha256:3058e220922dbe835621552b21dc2475d30430bc75368cfdb7180e305ac007f6 | sha256:3058e220922dbe835621552b21dc2475d30430bc75368cfdb7180e305ac007f6 | — |
| sha256:434d1ad555840ef2a4d1dad41eb5a1bd1ef3f554b7d5255961d3f7d5fc5e44b8 | 20230201 | — |
| wolfi | 20230201 | — |
| wolfi-baselayout | 20230201-r30 | MIT |
| wolfi-baselayout | 20230201-r30 | MIT |
| wolfi-baselayout | 20230201-r30 | — |
| wolfi-baselayout.yaml | a4472f6292a5e48d6d611bf24c6e119b1a483e66 | Apache-2.0 |
0 fixable
| CVE | Severity | Package | Installed | Fixed in |
|---|---|---|---|---|
| GO-2026-5932 | Unknown | golang.org/x/crypto | v0.57.0 | — |
| GO-2026-6225 | Unknown | github.com/chrismellard/docker-credential-acr-env | v0.0.0-20230304212654-82a0ddb27589 | — |
Everything is verifiable without an account. Copy and run:
Build provenance (SLSA v1.0, Build L2)
gh attestation verify oci://ghcr.io/rtvkiz/minimal-cosign:latest --owner rtvkizCosign signature
cosign verify \
--certificate-identity-regexp='https://github.com/rtvkiz/minimal/' \
--certificate-oidc-issuer='https://token.actions.githubusercontent.com' \
ghcr.io/rtvkiz/minimal-cosign:latestSBOM attestation (SPDX)
cosign verify-attestation --type spdxjson \
--certificate-identity-regexp='https://github.com/rtvkiz/minimal/' \
--certificate-oidc-issuer='https://token.actions.githubusercontent.com' \
ghcr.io/rtvkiz/minimal-cosign:latest \
| jq -r '.payload | @base64d | fromjson | .predicate'Signatures are logged in the public Rekor transparency log.
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