{"cve":"CVE-2015-0799","nvd":{"published":"2015-04-08T10:59:01.500","modified":"2026-06-17T00:20:55.187","status":"Modified","description":"The HTTP Alternative Services feature in Mozilla Firefox before 37.0.1 allows man-in-the-middle attackers to bypass an intended X.509 certificate-verification step for an SSL server by specifying that server in the uri-host field of an Alt-Svc HTTP/2 response header.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-20"],"references":["http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00003.html","http://www.mozilla.org/security/announce/2015/mfsa2015-44.html","http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html","http://www.securitytracker.com/id/1032030","http://www.ubuntu.com/usn/USN-2557-1"],"products":["canonical:ubuntu_linux","mozilla:firefox","opensuse:opensuse"],"source":"nvd","synced_at":"2026-10-19T20:35:35.528235705+00:00"},"epss":{"cve":"CVE-2015-0799","score":0.0102,"percentile":0.63422,"date":"2026-10-31"},"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."]}