Vulnerability-Lookup

ubuntu-cve-2026-45793

Vulnerability from osv_ubuntu

Published

2026-05-20 00:00

Modified

2026-05-20 00:00

Summary

Details

[Github Actions issued GITHUB_TOKEN disclosure in GitHub Actions logs]

Severity

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-45793	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-45793	REPORT
	https://github.com/composer/composer/security/adv…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "composer",
            "binary_version": "1.0.0~beta2-1ubuntu0.1~esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "composer",
        "purl": "pkg:deb/ubuntu/composer@1.0.0~beta2-1ubuntu0.1~esm2?arch=source\u0026distro=esm-apps/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0.0~alpha10+20150602-1",
        "1.0.0~alpha10+20150602-2",
        "1.0.0~alpha11-1",
        "1.0.0~alpha11-1ubuntu1",
        "1.0.0~alpha11-2",
        "1.0.0~alpha11-3",
        "1.0.0~beta1-1ubuntu1",
        "1.0.0~beta2-1",
        "1.0.0~beta2-1ubuntu0.1~esm1",
        "1.0.0~beta2-1ubuntu0.1~esm2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "composer",
            "binary_version": "1.6.3-1ubuntu0.1~esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "composer",
        "purl": "pkg:deb/ubuntu/composer@1.6.3-1ubuntu0.1~esm2?arch=source\u0026distro=esm-apps/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.5.1-1",
        "1.5.2-1",
        "1.6.2-1",
        "1.6.3-1",
        "1.6.3-1ubuntu0.1~esm1",
        "1.6.3-1ubuntu0.1~esm2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "composer",
            "binary_version": "1.10.1-1ubuntu0.1~esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "composer",
        "purl": "pkg:deb/ubuntu/composer@1.10.1-1ubuntu0.1~esm2?arch=source\u0026distro=esm-apps/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.9.0-2",
        "1.9.1-1",
        "1.9.2-1",
        "1.9.3-1",
        "1.10.0-1",
        "1.10.1-1",
        "1.10.1-1ubuntu0.1~esm1",
        "1.10.1-1ubuntu0.1~esm2"
      ]
    }
  ],
  "aliases": [],
  "details": "[Github Actions issued GITHUB_TOKEN disclosure in GitHub Actions logs]",
  "id": "UBUNTU-CVE-2026-45793",
  "modified": "2026-05-20T00:00:00Z",
  "published": "2026-05-20T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-45793"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-45793"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/composer/composer/security/advisories/GHSA-f9f8-rm49-7jv2"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-45793"
  ]
}

CVE-2026-45793 (GCVE-0-2026-45793)

Vulnerability from cvelistv5 – Published: 2026-07-15 16:22 – Updated: 2026-07-15 18:11

Title

Composer: Github Actions issued GITHUB_TOKEN disclosure in GitHub Actions logs

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.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor

Assigner

GitHub_M

References

9 references

URL	Tags
https://github.com/composer/composer/security/adv…	x_refsource_CONFIRM
https://github.com/composer/composer/pull/12853	x_refsource_MISC
https://github.com/composer/composer/pull/12855	x_refsource_MISC
https://github.com/composer/composer/commit/3f5e7…	x_refsource_MISC
https://github.com/composer/composer/commit/65e63…	x_refsource_MISC
https://github.com/composer/composer/commit/e66c8…	x_refsource_MISC
https://github.com/composer/composer/releases/tag…	x_refsource_MISC
https://github.com/composer/composer/releases/tag…	x_refsource_MISC
https://github.com/composer/composer/releases/tag/2.9.8	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
composer	composer	Affected: >= 1.0, < 1.10.28 Affected: >= 2.0.0, < 2.2.28 Affected: >= 2.3.0, < 2.9.8

Show details on NVD website

JSON

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"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

ubuntu-cve-2026-45793

Vulnerability from osv_ubuntu

CVE-2026-45793 (GCVE-0-2026-45793)

Tags

Sightings

Nomenclature