CVE-2026-118389 (GCVE-0-2026-118389)

Vulnerability from cvelistv5 – Published: 2026-11-15 21:13 – Updated: 2026-11-15 21:13
VLAI
Title
Gitea RubyGems compact index injection through package metadata
Summary
The RubyGems package registry accepted gems whose platform, dependency names or dependency version requirements contain newline characters. Because the compact index served to clients is line-based, a user who can publish a gem to an owner's registry could forge index entries, such as packages that do not exist or additional versions of an existing gem with dependencies of their choice. Clients that resolve gems from that registry could then be led to install attacker-chosen dependencies. Gems with such metadata are now rejected.
Severity
No CVSS data available.
CWE
  • CWE-74 - Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Assigner
Gitea CNA under the mitre root
CNA scorecard C 61/100 over 205 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Gitea Gitea Affected: 0 , < 28.3.0 (semver)
guessed Create a notification for this product.
Credits
https://github.com/nithissh7 https://github.com/hariprasanth9317-tech https://github.com/basavaraj-sm05
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageName": "gitea.dev",
          "product": "Gitea",
          "vendor": "Gitea",
          "versions": [
            {
              "lessThan": "28.3.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "https://github.com/nithissh7"
        },
        {
          "lang": "en",
          "type": "reporter",
          "value": "https://github.com/hariprasanth9317-tech"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "https://github.com/basavaraj-sm05"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The RubyGems package registry accepted gems whose platform, dependency names or dependency version requirements contain newline characters. Because the compact index served to clients is line-based, a user who can publish a gem to an owner\u0027s registry could forge index entries, such as packages that do not exist or additional versions of an existing gem with dependencies of their choice. Clients that resolve gems from that registry could then be led to install attacker-chosen dependencies. Gems with such metadata are now rejected."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-74",
              "description": "CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component (\u0027Injection\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-15T21:13:39.832Z",
        "orgId": "88ee5874-cf24-4952-aea0-31affedb7ff2",
        "shortName": "Gitea"
      },
      "references": [
        {
          "name": "GitHub Security Advisory GHSA-49c9-hm8q-6rvq",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://github.com/go-gitea/gitea/security/advisories/GHSA-49c9-hm8q-6rvq"
        },
        {
          "name": "Fix: go-gitea/gitea pull request #39782",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/go-gitea/gitea/pull/39782"
        },
        {
          "name": "Fix backport to release/v28: go-gitea/gitea pull request #39900",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/go-gitea/gitea/pull/39900"
        },
        {
          "name": "Gitea 28.4.0 release announcement",
          "tags": [
            "release-notes"
          ],
          "url": "https://blog.gitea.com/release-of-28.4.0/"
        },
        {
          "name": "go-gitea/gitea v28.3.0 release",
          "tags": [
            "release-notes"
          ],
          "url": "https://github.com/go-gitea/gitea/releases/tag/v28.3.0"
        }
      ],
      "title": "Gitea RubyGems compact index injection through package metadata"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "88ee5874-cf24-4952-aea0-31affedb7ff2",
    "assignerShortName": "Gitea",
    "cveId": "CVE-2026-118389",
    "datePublished": "2026-11-15T21:13:39.832Z",
    "dateReserved": "2026-11-15T20:29:37.637Z",
    "dateUpdated": "2026-11-15T21:13:39.832Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "packageName": "gitea.dev",
                "product": "Gitea",
                "vendor": "Gitea",
                "versions": [
                  {
                    "lessThan": "28.3.0",
                    "status": "affected",
                    "version": "0",
                    "versionType": "semver"
                  }
                ]
              }
            ],
            "source": "88ee5874-cf24-4952-aea0-31affedb7ff2"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "The RubyGems package registry accepted gems whose platform, dependency names or dependency version requirements contain newline characters. Because the compact index served to clients is line-based, a user who can publish a gem to an owner\u0027s registry could forge index entries, such as packages that do not exist or additional versions of an existing gem with dependencies of their choice. Clients that resolve gems from that registry could then be led to install attacker-chosen dependencies. Gems with such metadata are now rejected."
          }
        ],
        "id": "CVE-2026-118389",
        "lastModified": "2026-11-15T22:17:17.460",
        "metrics": {},
        "published": "2026-11-15T22:17:17.350",
        "references": [
          {
            "source": "88ee5874-cf24-4952-aea0-31affedb7ff2",
            "url": "https://blog.gitea.com/release-of-28.4.0/"
          },
          {
            "source": "88ee5874-cf24-4952-aea0-31affedb7ff2",
            "url": "https://github.com/go-gitea/gitea/pull/39782"
          },
          {
            "source": "88ee5874-cf24-4952-aea0-31affedb7ff2",
            "url": "https://github.com/go-gitea/gitea/pull/39900"
          },
          {
            "source": "88ee5874-cf24-4952-aea0-31affedb7ff2",
            "url": "https://github.com/go-gitea/gitea/releases/tag/v28.3.0"
          },
          {
            "source": "88ee5874-cf24-4952-aea0-31affedb7ff2",
            "url": "https://github.com/go-gitea/gitea/security/advisories/GHSA-49c9-hm8q-6rvq"
          }
        ],
        "sourceIdentifier": "88ee5874-cf24-4952-aea0-31affedb7ff2",
        "vulnStatus": "Deferred",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-74"
              }
            ],
            "source": "88ee5874-cf24-4952-aea0-31affedb7ff2",
            "type": "Secondary"
          }
        ]
      }
    }
  }
}



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