CVE-2026-45793 (GCVE-0-2026-45793)
Vulnerability from cvelistv5
Published
2026-07-15 16:22
Modified
2026-07-15 18:11
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE
  • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Summary
Composer is a dependency Manager for the PHP language. Prior to 1.10.28, 2.2.28, and 2.9.8, Composer\IO\BaseIO::loadConfiguration() validates GitHub OAuth tokens with the regex ^[.A-Za-z0-9_]+$ and interpolates rejected tokens into an UnexpectedValueException; GitHub Actions GITHUB_TOKEN values using the ghs_<id>_<base64url-JWT> format can contain -, fail validation, and be disclosed to stderr or CI logs. This issue is fixed in versions 1.10.28, 2.2.28, and 2.9.8.
References
Impacted products
Vendor Product Version
composer composer Version: >= 1.0, < 1.10.28
Version: >= 2.0.0, < 2.2.28
Version: >= 2.3.0, < 2.9.8
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-45793",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-15T18:11:02.102503Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-15T18:11:10.355Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "composer",
          "vendor": "composer",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.0, \u003c 1.10.28"
            },
            {
              "status": "affected",
              "version": "\u003e= 2.0.0, \u003c 2.2.28"
            },
            {
              "status": "affected",
              "version": "\u003e= 2.3.0, \u003c 2.9.8"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Composer is a dependency Manager for the PHP language. Prior to 1.10.28, 2.2.28, and 2.9.8, Composer\\IO\\BaseIO::loadConfiguration() validates GitHub OAuth tokens with the regex ^[.A-Za-z0-9_]+$ and interpolates rejected tokens into an UnexpectedValueException; GitHub Actions GITHUB_TOKEN values using the ghs_\u003cid\u003e_\u003cbase64url-JWT\u003e format can contain -, fail validation, and be disclosed to stderr or CI logs. This issue is fixed in versions 1.10.28, 2.2.28, and 2.9.8."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-200",
              "description": "CWE-200: Exposure of Sensitive Information to an Unauthorized Actor",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-15T16:22:19.418Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/composer/composer/security/advisories/GHSA-f9f8-rm49-7jv2",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/composer/composer/security/advisories/GHSA-f9f8-rm49-7jv2"
        },
        {
          "name": "https://github.com/composer/composer/pull/12853",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/composer/composer/pull/12853"
        },
        {
          "name": "https://github.com/composer/composer/pull/12855",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/composer/composer/pull/12855"
        },
        {
          "name": "https://github.com/composer/composer/commit/3f5e7f9fbfa541137d6d1d5643ec3b718e9d5039",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/composer/composer/commit/3f5e7f9fbfa541137d6d1d5643ec3b718e9d5039"
        },
        {
          "name": "https://github.com/composer/composer/commit/65e6390c49f1a11cd8b660d81822086db51fe2d1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/composer/composer/commit/65e6390c49f1a11cd8b660d81822086db51fe2d1"
        },
        {
          "name": "https://github.com/composer/composer/commit/e66c8fdb7ff5409bd2f358c5f194038e49e93714",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/composer/composer/commit/e66c8fdb7ff5409bd2f358c5f194038e49e93714"
        },
        {
          "name": "https://github.com/composer/composer/releases/tag/1.10.28",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/composer/composer/releases/tag/1.10.28"
        },
        {
          "name": "https://github.com/composer/composer/releases/tag/2.2.28",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/composer/composer/releases/tag/2.2.28"
        },
        {
          "name": "https://github.com/composer/composer/releases/tag/2.9.8",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/composer/composer/releases/tag/2.9.8"
        }
      ],
      "source": {
        "advisory": "GHSA-f9f8-rm49-7jv2",
        "discovery": "UNKNOWN"
      },
      "title": "Composer: Github Actions issued GITHUB_TOKEN disclosure in GitHub Actions logs"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-45793",
    "datePublished": "2026-07-15T16:22:19.418Z",
    "dateReserved": "2026-05-13T08:19:32.603Z",
    "dateUpdated": "2026-07-15T18:11:10.355Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-45793\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-07-15T18:11:02.102503Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-07-15T18:11:07.531Z\"}}], \"cna\": {\"title\": \"Composer: Github Actions issued GITHUB_TOKEN disclosure in GitHub Actions logs\", \"source\": {\"advisory\": \"GHSA-f9f8-rm49-7jv2\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.5, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"HIGH\"}}], \"affected\": [{\"vendor\": \"composer\", \"product\": \"composer\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003e= 1.0, \u003c 1.10.28\"}, {\"status\": \"affected\", \"version\": \"\u003e= 2.0.0, \u003c 2.2.28\"}, {\"status\": \"affected\", \"version\": \"\u003e= 2.3.0, \u003c 2.9.8\"}]}], \"references\": [{\"url\": \"https://github.com/composer/composer/security/advisories/GHSA-f9f8-rm49-7jv2\", \"name\": \"https://github.com/composer/composer/security/advisories/GHSA-f9f8-rm49-7jv2\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/composer/composer/pull/12853\", \"name\": \"https://github.com/composer/composer/pull/12853\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/composer/composer/pull/12855\", \"name\": \"https://github.com/composer/composer/pull/12855\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/composer/composer/commit/3f5e7f9fbfa541137d6d1d5643ec3b718e9d5039\", \"name\": \"https://github.com/composer/composer/commit/3f5e7f9fbfa541137d6d1d5643ec3b718e9d5039\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/composer/composer/commit/65e6390c49f1a11cd8b660d81822086db51fe2d1\", \"name\": \"https://github.com/composer/composer/commit/65e6390c49f1a11cd8b660d81822086db51fe2d1\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/composer/composer/commit/e66c8fdb7ff5409bd2f358c5f194038e49e93714\", \"name\": \"https://github.com/composer/composer/commit/e66c8fdb7ff5409bd2f358c5f194038e49e93714\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/composer/composer/releases/tag/1.10.28\", \"name\": \"https://github.com/composer/composer/releases/tag/1.10.28\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/composer/composer/releases/tag/2.2.28\", \"name\": \"https://github.com/composer/composer/releases/tag/2.2.28\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/composer/composer/releases/tag/2.9.8\", \"name\": \"https://github.com/composer/composer/releases/tag/2.9.8\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"Composer is a dependency Manager for the PHP language. Prior to 1.10.28, 2.2.28, and 2.9.8, Composer\\\\IO\\\\BaseIO::loadConfiguration() validates GitHub OAuth tokens with the regex ^[.A-Za-z0-9_]+$ and interpolates rejected tokens into an UnexpectedValueException; GitHub Actions GITHUB_TOKEN values using the ghs_\u003cid\u003e_\u003cbase64url-JWT\u003e format can contain -, fail validation, and be disclosed to stderr or CI logs. This issue is fixed in versions 1.10.28, 2.2.28, and 2.9.8.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-200\", \"description\": \"CWE-200: Exposure of Sensitive Information to an Unauthorized Actor\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-07-15T16:22:19.418Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-45793\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-15T18:11:10.355Z\", \"dateReserved\": \"2026-05-13T08:19:32.603Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-07-15T16:22:19.418Z\", \"assignerShortName\": \"GitHub_M\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.