Description
BentoML through 1.4.39 contains a Dockerfile instruction injection vulnerability that allows attackers to add arbitrary build instructions by embedding newlines in docker.env mapping keys rendered by the legacy base.j2 template. Attackers can supply a crafted bentofile.yaml or imported bento archive so that bentoml containerize executes injected RUN instructions during docker build, accessing build secrets and poisoning images.
References7
- github.com/bentoml/BentoML/blob/v1.4.39/src/bentoml/_internal/b…
- github.com/bentoml/BentoML/blob/v1.4.39/src/bentoml/_internal/c…
- github.com/bentoml/BentoML/blob/v1.4.39/src/bentoml/_internal/c…
- github.com/bentoml/BentoML/blob/v1.4.39/src/bentoml/_internal/c…
- github.com/geo-chen/oss/blob/main/BentoML.md
- www.vulncheck.com/advisories/bentoml-through-1.4.39-dockerfile-…
- github.com/geo-chen/oss/blob/main/BentoML.md
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - CVSS 4.0
-
8.5
HIGH
Score source: CNA
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 0% percentile: 12 · as of 10 November 2026
- CWE
- CWE-78
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.