CVE-2026-25479 (GCVE-0-2026-25479)
Vulnerability from cvelistv5
Published
2026-02-09 18:48
Modified
2026-02-10 16:01
CWE
  • CWE-185 - Incorrect Regular Expression
Summary
Litestar is an Asynchronous Server Gateway Interface (ASGI) framework. Prior to 2.20.0, in litestar.middleware.allowed_hosts, allowlist entries are compiled into regex patterns in a way that allows regex metacharacters to retain special meaning (e.g., . matches any character). This enables a bypass where an attacker supplies a host that matches the regex but is not the intended literal hostname. This vulnerability is fixed in 2.20.0.
Impacted products
Vendor Product Version
litestar-org litestar Version: < 2.20.0
Create a notification for this product.
Show details on NVD website


{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-25479",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-02-10T15:39:53.590127Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-02-10T16:01:11.941Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "litestar",
          "vendor": "litestar-org",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2.20.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Litestar is an Asynchronous Server Gateway Interface (ASGI) framework. Prior to 2.20.0, in litestar.middleware.allowed_hosts, allowlist entries are compiled into regex patterns in a way that allows regex metacharacters to retain special meaning (e.g., . matches any character). This enables a bypass where an attacker supplies a host that matches the regex but is not the intended literal hostname. This vulnerability is fixed in 2.20.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-185",
              "description": "CWE-185: Incorrect Regular Expression",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-09T18:48:19.971Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/litestar-org/litestar/security/advisories/GHSA-93ph-p7v4-hwh4",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/litestar-org/litestar/security/advisories/GHSA-93ph-p7v4-hwh4"
        },
        {
          "name": "https://github.com/litestar-org/litestar/commit/06b36f481d1bfea6f19995cfb4f203aba45c4ace",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/litestar-org/litestar/commit/06b36f481d1bfea6f19995cfb4f203aba45c4ace"
        },
        {
          "name": "https://docs.litestar.dev/2/release-notes/changelog.html#2.20.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://docs.litestar.dev/2/release-notes/changelog.html#2.20.0"
        },
        {
          "name": "https://github.com/litestar-org/litestar/releases/tag/v2.20.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/litestar-org/litestar/releases/tag/v2.20.0"
        }
      ],
      "source": {
        "advisory": "GHSA-93ph-p7v4-hwh4",
        "discovery": "UNKNOWN"
      },
      "title": "Litestar has an AllowedHosts validation bypass due to unescaped regex metacharacters in configured host patterns"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-25479",
    "datePublished": "2026-02-09T18:48:19.971Z",
    "dateReserved": "2026-02-02T16:31:35.821Z",
    "dateUpdated": "2026-02-10T16:01:11.941Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-25479\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-02-10T15:39:53.590127Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-02-10T15:39:54.271Z\"}}], \"cna\": {\"title\": \"Litestar has an AllowedHosts validation bypass due to unescaped regex metacharacters in configured host patterns\", \"source\": {\"advisory\": \"GHSA-93ph-p7v4-hwh4\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 6.5, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N\", \"integrityImpact\": \"LOW\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"LOW\"}}], \"affected\": [{\"vendor\": \"litestar-org\", \"product\": \"litestar\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003c 2.20.0\"}]}], \"references\": [{\"url\": \"https://github.com/litestar-org/litestar/security/advisories/GHSA-93ph-p7v4-hwh4\", \"name\": \"https://github.com/litestar-org/litestar/security/advisories/GHSA-93ph-p7v4-hwh4\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/litestar-org/litestar/commit/06b36f481d1bfea6f19995cfb4f203aba45c4ace\", \"name\": \"https://github.com/litestar-org/litestar/commit/06b36f481d1bfea6f19995cfb4f203aba45c4ace\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://docs.litestar.dev/2/release-notes/changelog.html#2.20.0\", \"name\": \"https://docs.litestar.dev/2/release-notes/changelog.html#2.20.0\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/litestar-org/litestar/releases/tag/v2.20.0\", \"name\": \"https://github.com/litestar-org/litestar/releases/tag/v2.20.0\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"Litestar is an Asynchronous Server Gateway Interface (ASGI) framework. Prior to 2.20.0, in litestar.middleware.allowed_hosts, allowlist entries are compiled into regex patterns in a way that allows regex metacharacters to retain special meaning (e.g., . matches any character). This enables a bypass where an attacker supplies a host that matches the regex but is not the intended literal hostname. This vulnerability is fixed in 2.20.0.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-185\", \"description\": \"CWE-185: Incorrect Regular Expression\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-02-09T18:48:19.971Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-25479\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-02-10T16:01:11.941Z\", \"dateReserved\": \"2026-02-02T16:31:35.821Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-02-09T18:48:19.971Z\", \"assignerShortName\": \"GitHub_M\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.


Loading…

Loading…