{"cve":"CVE-2021-22876","nvd":{"published":"2021-04-01T18:15:12.823","modified":"2026-10-14T11:16:52.113","status":"Modified","description":"curl 7.1.1 to and including 7.75.0 is vulnerable to an \"Exposure of Private Personal Information to an Unauthorized Actor\" by leaking credentials in the HTTP Referer: header. libcurl does not strip off user credentials from the URL when automatically populating the Referer: HTTP request header field in outgoing HTTP requests, and therefore risks leaking sensitive data to the server that is the target of the second HTTP request.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","score":5.3},"cwes":["CWE-200","CWE-359"],"references":["https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf","https://curl.se/docs/CVE-2021-22876.html","https://hackerone.com/reports/1101882","https://lists.debian.org/debian-lts-announce/2021/05/msg00019.html","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2ZC5BMIOKLBQJSFCHEDN2G2C2SH274BP/"],"products":["broadcom:fabric_operating_system","debian:debian_linux","fedoraproject:fedora","haxx:libcurl","netapp:hci_compute_node","netapp:hci_management_node","netapp:hci_storage_node","netapp:solidfire","oracle:communications_billing_and_revenue_management","oracle:essbase","siemens:sinec_infrastructure_network_services","splunk:universal_forwarder"],"source":"nvd","synced_at":"2026-10-19T21:17:01.373894544+00:00"},"epss":{"cve":"CVE-2021-22876","score":0.05301,"percentile":0.9253,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}