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CVE-2026-123372— compose-lint: A pull request can make compose-lint quote a secret from a CI-generated `.env` into its findings

Quick assessment

Affected
tmatens compose-lint
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

compose-lint 是一款用于 Docker Compose 的安全检查工具，可在部署前识别危险配置。在 GitHub Action 0.2.0 至 0.32.0 版本，以及 Python 包 0.22.0 至 0.32.0 版本中，compose-lint 会将同级目录下的 文件中的值代入镜像字段，并在 CL-0004 和 CL-0019 的检测消息及修复建议文本中对解析后的值进行引用处理。 若某工作流先将秘密（secret）写入该 文件，随后对不可信的拉取请求（pull request）内容执行 lint

CVSS 2.3 · Low

Possible ATT&CK Techniques 2 AI

T1038 T1040 · Network Sniffing

Affected Version Matrix 1

VendorProduct Version RangeStatus
tmatens compose-lint >= 0.22.0, < 0.32.0 affected
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I. Basic Information for CVE-2026-123372

Vulnerability Information
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Vulnerability Title
compose-lint: A pull request can make compose-lint quote a secret from a CI-generated `.env` into its findings
Source: CVE Program / CVE List V5
Vulnerability Description
compose-lint is a Docker Compose security linter that identifies dangerous misconfigurations before deployment. From 0.22.0 until 0.32.0, compose-lint substitutes values from a sibling .env file into image fields and quotes the resolved value in CL-0004 and CL-0019 finding messages and fix text. In a workflow that writes secrets into that file and then lints untrusted pull-request content, an attacker can reference a secret variable so its whole value reaches the job log, JSON output, SARIF artifacts, and Code Scanning alerts. Fork pull requests normally lack secrets, so exploitation requires a secret-bearing workflow such as pull_request_target, same-repository branches, or a retained .env on a self-hosted runner, and the pass or fail result is unchanged. This issue is fixed in version 0.32.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
tmatens compose-lint >= 0.22.0, < 0.32.0 -

II. Public POCs for CVE-2026-123372

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III. Intelligence Information for CVE-2026-123372

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Other References for CVE-2026-123372 (4)

Same Patch Batch · tmatens · 2026-11-09 · 7 CVEs total

CVE-2026-123369 5.3 MEDIUM compose-lint: Compose file text can issue GitHub Actions workflow commands through the com
CVE-2026-123370 5.1 MEDIUM compose-lint: `fix --apply` can delete a line the user did not select, including a securit
CVE-2026-123368 2.3 LOW compose-lint: .env read through a symlink outside the project can expose the CI job's envi
CVE-2026-123371 2.3 LOW compose-lint: A `.compose-lint.yml` symlinked outside the project is read, and a parse err
CVE-2026-123373 2.3 LOW compose-lint: A committed symlink makes compose-lint quote a file from outside the project
CVE-2026-123796 2.3 LOW compose-lint: Incomplete fix for GHSA-jf3h-8jvx-vcrg: a run stopped at the finding limit q

IV. Related Vulnerabilities

Same product: compose-lint
Same vendor: tmatens
Same weakness: CWE-200