Dockerfile command injection via envs[*].name in bentofile.yaml (sibling fix-bypass of CVE-2026-33744 and CVE-2026-35043)

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

8.8 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS

• CVE-2026-44346: 0.32% estimated exploitation activity in the next 30 days; percentile 25.18 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

BentoML envs[].name Dockerfile command injection — sibling of CVE-2026-33744 / CVE-2026-35043 A malicious bentofile.yaml containing a newline-injected value in envs[].name produces unquoted RUN directives in the BentoML-generated Dockerfile. When the victim runs bentoml containerize on the imported bento, those RUN directives execute on the host during docker build. Verified end-to-end on bentoml==1.4.38. Vulnerable code src/bentoml/internal/container/frontend/dockerfile/templates/basev2.j2:71-73: env.value is bash-quoted via the bashquote filter, but env.name is interpolated raw with no escaping or newline filtering. The template is rendered by bentomlimpl/docker.generatedockerfile (the v2 SDK Docker generation path used by bentoml containerize for modern services). Sibling relationship to existing CVEs The earlier patches addressed the same Dockerfile-command-injection class for a different bentofile field: - CVE-2026-33744 / GHSA-jfjg-vc52-wqvf (2026-03-25): added bashquote to…

Published by the source

11 May 2026, 14:27 UTC

Last modified by the source

9 Jun 2026, 00:00 UTC

Source last checked

26 Oct 2026, 13:45 UTC

1. Revision 2 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-w2pm-x38x-jp44

2. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-w2pm-x38x-jp44

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# Patch Next advisory brief: CVE-2026-44346

Advisory: Dockerfile command injection via envs[*].name in bentofile.yaml (sibling fix-bypass of CVE-2026-33744 and CVE-2026-35043)
IDs: CVE-2026-44346, GHSA-w2pm-x38x-jp44
Record: https://patchnext.com/advisories/cve-2026-44346 (revision 2, source checked 26 Oct 2026, 13:45 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.8)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: bentoml 1.4.39. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI bentoml: affected <= 1.4.38; fixed in 1.4.39

## Suggested inspection (read-only)
- `python -m pip show bentoml`: prints the installed version. Run with the environment that serves production active.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on bentoml.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-w2pm-x38x-jp44 (OSV record GHSA-w2pm-x38x-jp44 lists affected ranges: PyPI bentoml >=0 <1.4.39 (fixed))
- Verified: https://github.com/advisories/GHSA-w2pm-x38x-jp44 (GitHub-reviewed advisory GHSA-w2pm-x38x-jp44 lists affected ranges: PyPI bentoml >=0 <=1.4.38)

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