{"id":"CVE-2019-11935","url":"https://www.cyber-defence.io/tools/cve/CVE-2019-11935","generatedAt":"2026-10-29T00:59:00.422Z","title":"Insufficient boundary checks when processing a string in mb_ereg_replace allows access to out-of-bounds memory.","description":"Insufficient boundary checks when processing a string in mb_ereg_replace allows access to out-of-bounds memory. This issue affects HHVM versions prior to 3.30.12, all versions between 4.0.0 and 4.8.5, all versions between 4.9.0 and 4.23.1, as well as 4.24.0, 4.25.0, 4.26.0, 4.27.0, 4.28.0, and 4.28.1.","published":"2019-12-04T17:16:43.000Z","lastModified":"2026-06-17T02:13:52.000Z","status":"Modified","sourceIdentifier":"cve-assign@fb.com","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-125","CWE-120"],"affected":["facebook/hhvm"],"epss":{"score":0.01476,"percentile":0.73722,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (1.48%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://github.com/facebook/hhvm/commit/1c518555dba6ceb45d5ba61845b96e261219c3b7","tags":["Patch","Third Party Advisory"],"source":"cve-assign@fb.com"},{"url":"https://hhvm.com/blog/2019/10/28/security-update.html","tags":["Vendor Advisory"],"source":"cve-assign@fb.com"},{"url":"https://www.facebook.com/security/advisories/cve-2019-11935","tags":["Vendor Advisory"],"source":"cve-assign@fb.com"},{"url":"https://github.com/facebook/hhvm/commit/1c518555dba6ceb45d5ba61845b96e261219c3b7","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://hhvm.com/blog/2019/10/28/security-update.html","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.facebook.com/security/advisories/cve-2019-11935","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2019-11935","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}