CVE-2026-49448 (GCVE-0-2026-49448)

Vulnerability from cvelistv5 – Published: 2026-06-02 20:31 – Updated: 2026-06-02 20:31
VLAI
Title
authentik: SourceStage bypass via empty POST
Summary
authentik is an open-source identity provider. Prior to versions 2025.12.6, 2026.2.4, and 2026.5.1, the Source stage can be bypassed by sending an empty POST. This issue has been patched in versions 2025.12.6, 2026.2.4, and 2026.5.1.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-287 - Improper Authentication
Assigner
References
Impacted products
Vendor Product Version
goauthentik authentik Affected: < 2025.12.6
Affected: < 2026.2.4
Affected: < 2026.5.1
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "authentik",
          "vendor": "goauthentik",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2025.12.6"
            },
            {
              "status": "affected",
              "version": "\u003c 2026.2.4"
            },
            {
              "status": "affected",
              "version": "\u003c 2026.5.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "authentik is an open-source identity provider. Prior to versions 2025.12.6, 2026.2.4, and 2026.5.1, the Source stage can be bypassed by sending an empty POST. This issue has been patched in versions 2025.12.6, 2026.2.4, and 2026.5.1."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-287",
              "description": "CWE-287: Improper Authentication",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-02T20:31:20.323Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/goauthentik/authentik/security/advisories/GHSA-xp7f-xjjx-gwm8",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/goauthentik/authentik/security/advisories/GHSA-xp7f-xjjx-gwm8"
        }
      ],
      "source": {
        "advisory": "GHSA-xp7f-xjjx-gwm8",
        "discovery": "UNKNOWN"
      },
      "title": "authentik: SourceStage bypass via empty POST"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-49448",
    "datePublished": "2026-06-02T20:31:20.323Z",
    "dateReserved": "2026-05-30T02:43:33.106Z",
    "dateUpdated": "2026-06-02T20:31:20.323Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-49448",
      "date": "2026-06-03",
      "epss": "0.00041",
      "percentile": "0.12872"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-49448\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-06-02T21:16:28.490\",\"lastModified\":\"2026-06-02T21:16:28.490\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"authentik is an open-source identity provider. Prior to versions 2025.12.6, 2026.2.4, and 2026.5.1, the Source stage can be bypassed by sending an empty POST. This issue has been patched in versions 2025.12.6, 2026.2.4, and 2026.5.1.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":9.8,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-287\"}]}],\"references\":[{\"url\":\"https://github.com/goauthentik/authentik/security/advisories/GHSA-xp7f-xjjx-gwm8\",\"source\":\"security-advisories@github.com\"}]}}",
    "vulnrichment": {
      "containers": "{\"cna\": {\"title\": \"authentik: SourceStage bypass via empty POST\", \"problemTypes\": [{\"descriptions\": [{\"cweId\": \"CWE-287\", \"lang\": \"en\", \"description\": \"CWE-287: Improper Authentication\", \"type\": \"CWE\"}]}], \"metrics\": [{\"cvssV3_1\": {\"attackComplexity\": \"LOW\", \"attackVector\": \"NETWORK\", \"availabilityImpact\": \"HIGH\", \"baseScore\": 9.8, \"baseSeverity\": \"CRITICAL\", \"confidentialityImpact\": \"HIGH\", \"integrityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"scope\": \"UNCHANGED\", \"userInteraction\": \"NONE\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\", \"version\": \"3.1\"}}], \"references\": [{\"name\": \"https://github.com/goauthentik/authentik/security/advisories/GHSA-xp7f-xjjx-gwm8\", \"tags\": [\"x_refsource_CONFIRM\"], \"url\": \"https://github.com/goauthentik/authentik/security/advisories/GHSA-xp7f-xjjx-gwm8\"}], \"affected\": [{\"vendor\": \"goauthentik\", \"product\": \"authentik\", \"versions\": [{\"version\": \"\u003c 2025.12.6\", \"status\": \"affected\"}, {\"version\": \"\u003c 2026.2.4\", \"status\": \"affected\"}, {\"version\": \"\u003c 2026.5.1\", \"status\": \"affected\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-06-02T20:31:20.323Z\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"authentik is an open-source identity provider. Prior to versions 2025.12.6, 2026.2.4, and 2026.5.1, the Source stage can be bypassed by sending an empty POST. This issue has been patched in versions 2025.12.6, 2026.2.4, and 2026.5.1.\"}], \"source\": {\"advisory\": \"GHSA-xp7f-xjjx-gwm8\", \"discovery\": \"UNKNOWN\"}}, \"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-49448\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-06-03T12:46:21.867335Z\"}}}], \"references\": [{\"url\": \"https://github.com/goauthentik/authentik/security/advisories/GHSA-xp7f-xjjx-gwm8\", \"tags\": [\"exploit\"]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-06-03T12:46:12.447Z\"}}]}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-49448\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"state\": \"PUBLISHED\", \"assignerShortName\": \"GitHub_M\", \"dateReserved\": \"2026-05-30T02:43:33.106Z\", \"datePublished\": \"2026-06-02T20:31:20.323Z\", \"dateUpdated\": \"2026-06-03T12:46:25.064Z\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.