{"id":"CVE-2024-56140","state":"PUBLISHED","title":"Bypass of CSRF Middleware in Astro","description":"Astro is a web framework for content-driven websites. In affected versions a bug in Astro’s CSRF-protection middleware allows requests to bypass CSRF checks. When the `security.checkOrigin` configuration option is set to `true`, Astro middleware will perform a CSRF check. However, a vulnerability exists that can bypass this security. A semicolon-delimited parameter is allowed after the type in `Content-Type`. Web browsers will treat a `Content-Type` such as `application/x-www-form-urlencoded; abc` as a `simple request` and will not perform preflight validation. In this case, CSRF is not blocked as expected. Additionally, the `Content-Type` header is not required for a request. This issue has been addressed in version 4.16.17 and all users are advised to upgrade. There are no known workarounds for this vulnerability.","publishedAt":"2024-12-18T20:41:06.806Z","updatedAt":"2024-12-18T21:03:36.201Z","severity":{"score":5.9,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["withastro astro"],"affected":[{"vendor":"withastro","product":"astro","versions":[{"version":"< 4.16.17","status":"affected"}]}],"references":["https://github.com/withastro/astro/security/advisories/GHSA-c4pw-33h3-35xw","https://github.com/withastro/astro/commit/e7d14c374b9d45e27089994a4eb72186d05514de","https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS#simple_requests","https://github.com/withastro/astro/blob/6031962ab5f56457de986eb82bd24807e926ba1b/packages/astro/src/core/app/middlewares.ts"],"weaknesses":["CWE-352"],"ingestedAt":"2026-10-29T20:08:12.933Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2024/56xxx/CVE-2024-56140.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2024-56140","state":"PUBLISHED","datePublished":"2024-12-18T20:41:06.806Z","dateUpdated":"2024-12-18T21:03:36.201Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2024-12-16T17:30:30.068Z"},"containers":{"cna":{"title":"Bypass of CSRF Middleware in Astro","descriptions":[{"lang":"en","value":"Astro is a web framework for content-driven websites. In affected versions a bug in Astro’s CSRF-protection middleware allows requests to bypass CSRF checks. When the `security.checkOrigin` configuration option is set to `true`, Astro middleware will perform a CSRF check. However, a vulnerability exists that can bypass this security. A semicolon-delimited parameter is allowed after the type in `Content-Type`. Web browsers will treat a `Content-Type` such as `application/x-www-form-urlencoded; abc` as a `simple request` and will not perform preflight validation. In this case, CSRF is not blocked as expected. Additionally, the `Content-Type` header is not required for a request. This issue has been addressed in version 4.16.17 and all users are advised to upgrade. There are no known workarounds for this vulnerability."}],"affected":[{"vendor":"withastro","product":"astro","versions":[{"version":"< 4.16.17","status":"affected"}]}],"references":[{"url":"https://github.com/withastro/astro/security/advisories/GHSA-c4pw-33h3-35xw","name":"https://github.com/withastro/astro/security/advisories/GHSA-c4pw-33h3-35xw","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/withastro/astro/commit/e7d14c374b9d45e27089994a4eb72186d05514de","name":"https://github.com/withastro/astro/commit/e7d14c374b9d45e27089994a4eb72186d05514de","tags":["x_refsource_MISC"]},{"url":"https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS#simple_requests","name":"https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS#simple_requests","tags":["x_refsource_MISC"]},{"url":"https://github.com/withastro/astro/blob/6031962ab5f56457de986eb82bd24807e926ba1b/packages/astro/src/core/app/middlewares.ts","name":"https://github.com/withastro/astro/blob/6031962ab5f56457de986eb82bd24807e926ba1b/packages/astro/src/core/app/middlewares.ts","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.9,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-352","lang":"en","description":"CWE-352: Cross-Site Request Forgery (CSRF)","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2024-12-18T20:41:06.806Z"},"source":{"advisory":"GHSA-c4pw-33h3-35xw","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2024-12-18T21:03:26.338528Z","id":"CVE-2024-56140","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-12-18T21:03:36.201Z"}}]}}}