{"schema_version":"1","data":[{"id":2962,"advisory_id":"750da300-f19a-4471-938f-0f563ad614c8","revision":1,"source_id":"core-kev","source_url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-40438","source_published_at":"2021-12-01T00:00:00+00:00","published_at":"2026-10-24T21:26:53.453299+00:00","extraction_method":"structured","technologies":["apache","core-kev"],"cve_ids":["CVE-2021-40438"],"event_types":["advisory"],"payload":{"kind":"advisory","title":"Apache HTTP Server-Side Request Forgery (SSRF)","summary":"A crafted request uri-path can cause mod_proxy to forward the request to an origin server choosen by the remote user. This issue affects Apache HTTP Server 2.4.48 and earlier. CISA required action: Apply updates per vendor instructions.","evidence":"kev:CVE-2021-40438","products":[{"name":{"value":"Apache","evidence":"/product"},"prerequisites":[],"fixed_versions":[],"affected_versions":[]}],"severity":"unknown","structured":{"id":"CVE-2021-40438","aliases":["CVE-2021-40438"],"affected":[],"modified":"2021-12-01T00:00:00.000Z","provider":"kev","references":["https://www.cisa.gov/known-exploited-vulnerabilities-catalog"],"exploitation":{"cwes":["CWE-918"],"cveID":"CVE-2021-40438","notes":"https://nvd.nist.gov/vuln/detail/CVE-2021-40438","dueDate":"2021-12-15","product":"Apache","dateAdded":"2021-12-01","vendorProject":"Apache","requiredAction":"Apply updates per vendor instructions.","known_exploited":true,"shortDescription":"A crafted request uri-path can cause mod_proxy to forward the request to an origin server choosen by the remote user. This issue affects Apache HTTP Server 2.4.48 and earlier.","vulnerabilityName":"Apache HTTP Server-Side Request Forgery (SSRF)","knownRansomwareCampaignUse":"Known"}},"related_cves":[{"value":"CVE-2021-40438","evidence":"/cveID"}],"security_relevant":true,"severity_evidence":null},"priority":{"reasons":["known_exploited"],"severity":"unknown","linked_cves":[],"fix_available":false,"known_exploited":true,"publisher_severity":"unknown"},"context_update":false}],"next_after":2962,"next_before":2962}