Insertion of Sensitive Information Into Sent Data in GitLab

{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "cveMetadata": {
    "cveId": "CVE-2026-105777",
    "assignerOrgId": "ceab7361-8a18-47b1-92ba-4d7d25f6715a",
    "assignerShortName": "GitLab",
    "dateUpdated": "2026-10-21T23:34:25.440Z",
    "dateReserved": "2026-10-05T20:34:16.301Z",
    "datePublished": "2026-10-21T23:34:25.440Z",
    "state": "PUBLISHED"
  },
  "containers": {
    "cna": {
      "providerMetadata": {
        "orgId": "ceab7361-8a18-47b1-92ba-4d7d25f6715a",
        "shortName": "GitLab",
        "dateUpdated": "2026-10-21T23:34:25.440Z"
      },
      "title": "Insertion of Sensitive Information Into Sent Data in GitLab",
      "descriptions": [
        {
          "lang": "en",
          "value": "GitLab has remediated an issue in GitLab CE/EE affecting all versions from 17.6.5 before 19.3.6, 19.4 before 19.4.3, and 19.5 before 19.5.1 that, under certain conditions, an unauthenticated user could have retrieved sensitive internal server credentials due to improper filtering of internal response headers."
        }
      ],
      "affected": [
        {
          "vendor": "GitLab",
          "product": "GitLab",
          "cpes": [
            "cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*"
          ],
          "repo": "https://gitlab.com/gitlab-org/gitlab",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "17.6.5",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "19.3.6"
            },
            {
              "version": "19.4",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "19.4.3"
            },
            {
              "version": "19.5",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "19.5.1"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "CWE-201: Insertion of Sensitive Information Into Sent Data",
              "cweId": "CWE-201",
              "type": "CWE"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://gitlab.com/gitlab-org/gitlab/-/work_items/597022"
        },
        {
          "url": "https://hackerone.com/reports/3657282",
          "name": "HackerOne Bug Bounty Report #3657282",
          "tags": [
            "technical-description",
            "exploit",
            "permissions-required"
          ]
        },
        {
          "url": "https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-5-1-released/"
        }
      ],
      "metrics": [
        {
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ],
          "cvssV3_1": {
            "version": "3.1",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
            "attackVector": "NETWORK",
            "attackComplexity": "LOW",
            "privilegesRequired": "LOW",
            "userInteraction": "NONE",
            "scope": "UNCHANGED",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM"
          }
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to versions 19.3.6, 19.4.3, 19.5.1 or above."
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Thanks [altair00](https://hackerone.com/altair00) for reporting this vulnerability through our HackerOne bug bounty program",
          "type": "finder"
        }
      ]
    }
  }
}