CVE-2026-123370 (GCVE-0-2026-123370)

Vulnerability from cvelistv5 – Published: 2026-11-09 17:34 – Updated: 2026-11-09 17:34
VLAI
Title
compose-lint: `fix --apply` can delete a line the user did not select, including a security setting
Summary
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.
Severity
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
CWE
Assigner
GitHub_M CNA
References
Impacted products
Vendor Product Version
tmatens compose-lint Affected: >= 0.9.0, < 0.18.0
Create a notification for this product.
Show details on NVD website
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "compose-lint",
          "vendor": "tmatens",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 0.9.0, \u003c 0.18.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "compose-lint is a Docker Compose security linter that identifies dangerous misconfigurations before deployment. From 0.9.0 until 0.18.0, compose-lint\u0027s 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."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 5.1,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "LOW",
            "userInteraction": "ACTIVE",
            "vectorString": "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",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "LOW"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-193",
              "description": "CWE-193: Off-by-one Error",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-09T17:34:24.026Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/tmatens/compose-lint/security/advisories/GHSA-65v8-q222-64xx",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/tmatens/compose-lint/security/advisories/GHSA-65v8-q222-64xx"
        },
        {
          "name": "https://github.com/tmatens/compose-lint/pull/547",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/tmatens/compose-lint/pull/547"
        },
        {
          "name": "https://github.com/tmatens/compose-lint/pull/549",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/tmatens/compose-lint/pull/549"
        },
        {
          "name": "https://github.com/tmatens/compose-lint/commit/c9d453a6a69c076788fe1db05cb54684a616d1de",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/tmatens/compose-lint/commit/c9d453a6a69c076788fe1db05cb54684a616d1de"
        },
        {
          "name": "https://github.com/tmatens/compose-lint/commit/cbbf886d91347dea9c51b584eb50088e70007d0d",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/tmatens/compose-lint/commit/cbbf886d91347dea9c51b584eb50088e70007d0d"
        },
        {
          "name": "https://github.com/tmatens/compose-lint/releases/tag/v0.18.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/tmatens/compose-lint/releases/tag/v0.18.0"
        }
      ],
      "source": {
        "advisory": "GHSA-65v8-q222-64xx",
        "discovery": "UNKNOWN"
      },
      "title": "compose-lint: `fix --apply` can delete a line the user did not select, including a security setting"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-123370",
    "datePublished": "2026-11-09T17:34:24.026Z",
    "dateReserved": "2026-11-05T20:43:10.420Z",
    "dateUpdated": "2026-11-09T17:34:24.026Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}



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