FKIE_CVE-2026-23511

Vulnerability from fkie_nvd - Published: 2026-01-15 20:16 - Updated: 2026-01-20 16:44
Severity ?
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Summary
ZITADEL is an open source identity management platform. Prior to 4.9.1 and 3.4.6, a user enumeration vulnerability has been discovered in Zitadel's login interfaces. An unauthenticated attacker can exploit this flaw to confirm the existence of valid user accounts by iterating through usernames and userIDs. This vulnerability is fixed in 4.9.1 and 3.4.6.
References
security-advisories@github.comhttps://github.com/zitadel/zitadel/commit/b85ab69e4679b0268e2b0e9b4cd04e934af10dd2Patch
security-advisories@github.comhttps://github.com/zitadel/zitadel/commit/c300d4cc6a2775ab17ddfe76492f24170f8b858dPatch
security-advisories@github.comhttps://github.com/zitadel/zitadel/releases/tag/v3.4.6Release Notes
security-advisories@github.comhttps://github.com/zitadel/zitadel/releases/tag/v4.9.1Release Notes
security-advisories@github.comhttps://github.com/zitadel/zitadel/security/advisories/GHSA-pvm5-9frx-264rThird Party Advisory
Impacted products
Vendor Product Version
zitadel zitadel *
zitadel zitadel *
zitadel zitadel *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:zitadel:zitadel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "AFFBAC9C-9A67-4AF4-985C-31DCC2F1311D",
              "versionEndIncluding": "2.71.19",
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            },
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          "negate": false,
          "operator": "OR"
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "ZITADEL is an open source identity management platform. Prior to 4.9.1 and 3.4.6, a user enumeration vulnerability has been discovered in Zitadel\u0027s login interfaces. An unauthenticated attacker can exploit this flaw to confirm the existence of valid user accounts by iterating through usernames and userIDs. This vulnerability is fixed in 4.9.1 and 3.4.6."
    }
  ],
  "id": "CVE-2026-23511",
  "lastModified": "2026-01-20T16:44:43.437",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "version": "3.1"
        },
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        "impactScore": 1.4,
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  "published": "2026-01-15T20:16:05.167",
  "references": [
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      "tags": [
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      "tags": [
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "value": "CWE-204"
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      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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