CVE-2026-123370
compose-lint: `fix --apply` can delete a line the user did not select, including a security setting
compose-lint is a Docker Compose security linter that identifies dangerous misconfigurations before deployment. From 0.9.0 until 0.18.0, compose-lint's YAML parser recognizes lone carriage returns and Unicode line separators U+0085, U+2028, and U+2029 as line breaks while fix position conversion counts only newline characters. A pull request can place one of these separators in a quoted value so fix --apply shifts each later edit and deletes the line after the selected target, including an unselected network or other security setting. The resulting Compose file can remain valid, post-edit checks can pass, and the command can report a successful fix even though the dry-run diff was the only place showing the extra deletion. This issue is fixed in version 0.18.0.
Fixes and workarounds
Fix
compose-lint (pip): GitHub reports patched versions 0.18.0. Check the advisory for the affected release branch.
Source: GitHub GHSA-65v8-q222-64xxFix
compose-lint (PyPI): OSV reports a fixed version 0.18.0. Check the advisory for supported release branches.
Source: OSV GHSA-65v8-q222-64xxAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| compose-lint tmatens |
>= 0.9.0, < 0.18.0 (affected) | CNA: GitHub_M |
compose-lintcompose-lint
pip |
>= 0.9.0, <= 0.17.0 (affected, GitHub advisory range) | GitHub GHSA-65v8-q222-64xx |
compose-lintcompose-lint
PyPI |
0.10.0 (affected, PyPI) 0.11.0 (affected, PyPI) 0.12.0 (affected, PyPI) 0.12.1 (affected, PyPI) 0.12.2 (affected, PyPI) 0.13.0 (affected, PyPI) 0.14.0 (affected, PyPI) 0.14.1 (affected, PyPI) 0.15.0 (affected, PyPI) 0.15.1 (affected, PyPI) 0.15.2 (affected, PyPI) 0.16.0 (affected, PyPI) 0.17.0 (affected, PyPI) 0.9.0 (affected, PyPI) Ecosystem version events: introduced 0.9.0; fixed 0.18.0 Source events (ECOSYSTEM)Other versions: unaffected |
OSV GHSA-65v8-q222-64xx |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 5.1 medium |
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N | CNA: GitHub_M |
| 4.0 / 5.1 medium |
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:L/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 | NVD: [email protected] |
Exploit evidence
- https://github.com/tmatens/compose-lint/security/advisories/GHSA-65v8-q222-64xx
exploit · ADP: CISA-ADP
References
- https://github.com/tmatens/compose-lint/security/advisories/GHSA-65v8-q222-64xxCNA: GitHub_M · x_refsource_CONFIRM
- https://github.com/tmatens/compose-lint/pull/547CNA: GitHub_M · x_refsource_MISC
- https://github.com/tmatens/compose-lint/pull/549CNA: GitHub_M · x_refsource_MISC
- https://github.com/tmatens/compose-lint/commit/c9d453a6a69c076788fe1db05cb54684a616d1deCNA: GitHub_M · x_refsource_MISC
- https://github.com/tmatens/compose-lint/commit/cbbf886d91347dea9c51b584eb50088e70007d0dCNA: GitHub_M · x_refsource_MISC
- https://github.com/tmatens/compose-lint/releases/tag/v0.18.0CNA: GitHub_M · x_refsource_MISC
- https://github.com/tmatens/compose-lint/security/advisories/GHSA-65v8-q222-64xxADP: CISA-ADP · exploit
- https://github.com/tmatens/compose-lint/commit/c9d453a6a69c076788fe1db05cb54684a616d1de[email protected]
- https://github.com/tmatens/compose-lint/commit/cbbf886d91347dea9c51b584eb50088e70007d0d[email protected]
- https://github.com/tmatens/compose-lint/pull/547[email protected]
- https://github.com/tmatens/compose-lint/pull/549[email protected]
- https://github.com/tmatens/compose-lint/releases/tag/v0.18.0[email protected]
- https://github.com/tmatens/compose-lint/security/advisories/GHSA-65v8-q222-64xx[email protected]
- https://github.com/tmatens/compose-lint/security/advisories/GHSA-65v8-q222-64xxGitHub Security Advisories · advisory
- https://github.com/advisories/GHSA-65v8-q222-64xxOSV / GitHub Security Advisories · advisory
- https://osv.dev/vulnerability/GHSA-65v8-q222-64xxOSV / GitHub Security Advisories · osv
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