{"id":"CVE-2026-5321","state":"PUBLISHED","title":"vanna-ai vanna FastAPI/Flask Server cross-domain policy","description":"A flaw has been found in vanna-ai vanna up to 2.0.2. Affected by this issue is some unknown functionality of the component FastAPI/Flask Server. Executing a manipulation can lead to permissive cross-domain policy with untrusted domains. The attack can be launched remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.","publishedAt":"2026-04-02T04:45:11.472Z","updatedAt":"2026-04-02T18:30:05.222Z","severity":{"score":5.3,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P","source":"VulDB"},"assigner":"VulDB","products":["vanna-ai vanna"],"affected":[{"vendor":"vanna-ai","product":"vanna","versions":[{"version":"2.0.0","status":"affected"},{"version":"2.0.1","status":"affected"},{"version":"2.0.2","status":"affected"}],"modules":["FastAPI/Flask Server"]}],"references":["https://vuldb.com/vuln/354653","https://vuldb.com/vuln/354653/cti","https://vuldb.com/submit/780729","https://github.com/August829/CVEP/issues/14"],"weaknesses":["CWE-942","CWE-346"],"ingestedAt":"2026-10-29T20:12:32.778Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/5xxx/CVE-2026-5321.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-5321","state":"PUBLISHED","datePublished":"2026-04-02T04:45:11.472Z","dateUpdated":"2026-04-02T18:30:05.222Z","assignerShortName":"VulDB","assignerOrgId":"1af790b2-7ee1-4545-860a-a788eba489b5","dateReserved":"2026-04-01T13:00:12.749Z"},"containers":{"cna":{"title":"vanna-ai vanna FastAPI/Flask Server cross-domain policy","descriptions":[{"lang":"en","value":"A flaw has been found in vanna-ai vanna up to 2.0.2. Affected by this issue is some unknown functionality of the component FastAPI/Flask Server. Executing a manipulation can lead to permissive cross-domain policy with untrusted domains. The attack can be launched remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way."}],"affected":[{"vendor":"vanna-ai","product":"vanna","versions":[{"version":"2.0.0","status":"affected"},{"version":"2.0.1","status":"affected"},{"version":"2.0.2","status":"affected"}],"modules":["FastAPI/Flask Server"]}],"references":[{"url":"https://vuldb.com/vuln/354653","name":"VDB-354653 | vanna-ai vanna FastAPI/Flask Server cross-domain policy","tags":["vdb-entry"]},{"url":"https://vuldb.com/vuln/354653/cti","name":"VDB-354653 | CTI Indicators (IOB, IOC)","tags":["signature","permissions-required"]},{"url":"https://vuldb.com/submit/780729","name":"Submit #780729 | vanna-ai vanna 2.0.2 CORS Origin Reflection with Credentials","tags":["third-party-advisory"]},{"url":"https://github.com/August829/CVEP/issues/14","tags":["exploit","issue-tracking"]}],"metrics":[{"cvssV4_0":{"version":"4.0","baseScore":5.3,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P","baseSeverity":"MEDIUM"}},{"cvssV3_1":{"version":"3.1","baseScore":4.3,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R","baseSeverity":"MEDIUM"}},{"cvssV3_0":{"version":"3.0","baseScore":4.3,"vectorString":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R","baseSeverity":"MEDIUM"}},{"cvssV2_0":{"version":"2.0","baseScore":4,"vectorString":"AV:N/AC:L/Au:S/C:N/I:P/A:N/E:POC/RL:ND/RC:UR"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-942","type":"CWE","lang":"en","description":"Permissive Cross-domain Policy with Untrusted Domains"}]},{"descriptions":[{"cweId":"CWE-346","type":"CWE","lang":"en","description":"Origin Validation Error"}]}],"providerMetadata":{"shortName":"VulDB","orgId":"1af790b2-7ee1-4545-860a-a788eba489b5","dateUpdated":"2026-04-02T04:45:11.472Z"},"timeline":[{"time":"2026-04-01T00:00:00.000Z","lang":"en","value":"Advisory disclosed"},{"time":"2026-04-01T02:00:00.000Z","lang":"en","value":"VulDB entry created"},{"time":"2026-04-01T15:05:20.000Z","lang":"en","value":"VulDB entry last update"}],"credits":[{"lang":"en","value":"Yu_Bao (VulDB User)","type":"reporter"},{"lang":"en","value":"VulDB","type":"coordinator"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-02T18:29:53.542419Z","id":"CVE-2026-5321","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-04-02T18:30:05.222Z"}}]}}}