stoatchat before 0.15.5 Account Enumeration via Error Location

{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "cveMetadata": {
    "cveId": "CVE-2026-100677",
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "dateUpdated": "2026-09-26T13:23:39.733Z",
    "dateReserved": "2026-09-26T02:36:51.809Z",
    "datePublished": "2026-09-26T13:23:39.733Z",
    "state": "PUBLISHED"
  },
  "containers": {
    "cna": {
      "providerMetadata": {
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck",
        "dateUpdated": "2026-09-26T13:23:39.733Z"
      },
      "datePublic": "2026-09-11T00:00:00.000Z",
      "title": "stoatchat before 0.15.5 Account Enumeration via Error Location",
      "descriptions": [
        {
          "lang": "en",
          "value": "stoatchat before 0.15.5 contains an account enumeration vulnerability in the login endpoint that exposes source file locations in error responses. Unauthenticated attackers can distinguish between registered and unregistered email addresses by comparing error location fields returned from POST /api/auth/session/login requests."
        }
      ],
      "affected": [
        {
          "vendor": "stoatchat",
          "product": "stoatchat",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "0.15.5"
            },
            {
              "version": "0.15.5",
              "status": "unaffected",
              "versionType": "semver"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "Generation of Error Message Containing Sensitive Information",
              "cweId": "CWE-209",
              "type": "CWE"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://github.com/stoatchat/stoatchat/security/advisories/GHSA-h44h-xx2j-hp56",
          "name": "GitHub Security Advisory (GHSA-h44h-xx2j-hp56)",
          "tags": [
            "vendor-advisory"
          ]
        },
        {
          "url": "https://www.vulncheck.com/advisories/stoatchat-before-0.15.5-account-enumeration-via-error-location",
          "name": "VulnCheck Advisory: stoatchat before 0.15.5 Account Enumeration via Error Location",
          "tags": [
            "third-party-advisory"
          ]
        }
      ],
      "metrics": [
        {
          "format": "CVSS"
        },
        {
          "format": "CVSS",
          "cvssV3_1": {
            "version": "3.1",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
            "attackVector": "NETWORK",
            "attackComplexity": "LOW",
            "privilegesRequired": "NONE",
            "userInteraction": "NONE",
            "scope": "UNCHANGED",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM"
          }
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "QuentinRa",
          "type": "reporter"
        }
      ]
    }
  }
}