{"cve":"CVE-2016-1546","nvd":{"published":"2016-07-06T14:59:01.503","modified":"2026-06-17T00:42:08.290","status":"Modified","description":"The Apache HTTP Server 2.4.17 and 2.4.18, when mod_http2 is enabled, does not limit the number of simultaneous stream workers for a single HTTP/2 connection, which allows remote attackers to cause a denial of service (stream-processing outage) via modified flow-control windows.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","score":5.9},"cwes":["CWE-399"],"references":["http://httpd.apache.org/security/vulnerabilities_24.html","http://svn.apache.org/viewvc?view=revision&revision=1733727","http://www.apache.org/dist/httpd/CHANGES_2.4","http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html","http://www.oracle.com/technetwork/topics/security/bulletinoct2016-3090566.html"],"products":["apache:http_server"],"source":"nvd","synced_at":"2026-10-19T20:38:51.654415212+00:00"},"epss":{"cve":"CVE-2016-1546","score":0.15923,"percentile":0.96895,"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."]}