{"id":"CVE-2020-1893","aliases":["EUVD-2020-12719","GHSA-m8q8-334f-8qxg","UBUNTU-CVE-2020-1893"],"status":"published","title":"Insufficient boundary checks when decoding JSON in TryParse reads out of bounds memory,...","description":"Insufficient boundary checks when decoding JSON in TryParse reads out of bounds memory, potentially leading to DOS. This issue affects HHVM 4.45.0, 4.44.0, 4.43.0, 4.42.0, 4.41.0, 4.40.0, 4.39.0, versions between 4.33.0 and 4.38.0 (inclusive), versions between 4.9.0 and 4.32.0 (inclusive), and versions prior to 4.8.7.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.01148,"percentile":0.67025,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-125"],"published":"2020-03-03T15:00:26Z","modified":"2026-11-04T02:45:36Z","affected":[{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"hhvm","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.11.0+dfsg-1","3.11.1+dfsg-1","3.11.1+dfsg-1ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"hhvm","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.21.0+dfsg-2","3.21.0+dfsg-2build1","3.21.0+dfsg-2build2","3.21.0+dfsg-2build3","3.21.0+dfsg-2ubuntu2"]}],"products":[{"vendor":"facebook","product":"hhvm"}],"references":[{"url":"https://hhvm.com/blog/2020/02/20/security-update.html","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","advisory","report"]},{"url":"https://github.com/facebook/hhvm/commit/bd586671a3c22eb2f07e55f11b3ce64e1f7961e7","tags":["x_refsource_CONFIRM","x_transferred","Patch","fix","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-1893"},{"url":"https://github.com/advisories/GHSA-m8q8-334f-8qxg"},{"url":"https://ubuntu.com/security/CVE-2020-1893","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-1893","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2020-1893","description":"Insufficient boundary checks when decoding JSON in TryParse reads out of bounds memory, potentially leading to DOS. This issue affects HHVM 4.45.0, 4.44.0, 4.43.0, 4.42.0, 4.41.0, 4.40.0, 4.39.0, versions between 4.33.0 and 4.38.0 (inclusive), versions between 4.9.0 and 4.32.0 (inclusive), and versions prior to 4.8.7.","status":"published","published":"2020-03-03T15:00:26Z","modified":"2024-08-04T06:53:59.787Z","cwes":["CWE-125"],"updated_at":"2026-11-02T14:35:56.638833Z"}],"euvd":[{"id":"EUVD-2020-12719","description":"Insufficient boundary checks when decoding JSON in TryParse reads out of bounds memory, potentially leading to DOS. This issue affects HHVM 4.45.0, 4.44.0, 4.43.0, 4.42.0, 4.41.0, 4.40.0, 4.39.0, versions between 4.33.0 and 4.38.0 (inclusive), versions between 4.9.0 and 4.32.0 (inclusive), and versions prior to 4.8.7.","status":"published","published":"2020-03-03T15:00:26Z","modified":"2024-08-04T06:53:59Z","updated_at":"2026-11-03T03:08:11.523019Z"}],"ghsa":[{"id":"GHSA-m8q8-334f-8qxg","title":"Insufficient boundary checks when decoding JSON in TryParse reads out of bounds memory,...","description":"Insufficient boundary checks when decoding JSON in TryParse reads out of bounds memory, potentially leading to DOS. This issue affects HHVM 4.45.0, 4.44.0, 4.43.0, 4.42.0, 4.41.0, 4.40.0, 4.39.0, versions between 4.33.0 and 4.38.0 (inclusive), versions between 4.9.0 and 4.32.0 (inclusive), and versions prior to 4.8.7.","status":"published","published":"2022-05-24T17:10:04Z","modified":"2023-01-29T05:01:39Z","updated_at":"2026-11-02T14:44:52.661438Z"}],"nvd":[{"id":"CVE-2020-1893","description":"Insufficient boundary checks when decoding JSON in TryParse reads out of bounds memory, potentially leading to DOS. This issue affects HHVM 4.45.0, 4.44.0, 4.43.0, 4.42.0, 4.41.0, 4.40.0, 4.39.0, versions between 4.33.0 and 4.38.0 (inclusive), versions between 4.9.0 and 4.32.0 (inclusive), and versions prior to 4.8.7.","status":"published","published":"2020-03-03T15:15:12.057Z","modified":"2026-06-17T03:02:34.107Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:05:54.796125Z"}],"osv":[{"id":"CVE-2020-1893","description":"Insufficient boundary checks when decoding JSON in TryParse reads out of bounds memory, potentially leading to DOS. This issue affects HHVM 4.45.0, 4.44.0, 4.43.0, 4.42.0, 4.41.0, 4.40.0, 4.39.0, versions between 4.33.0 and 4.38.0 (inclusive), versions between 4.9.0 and 4.32.0 (inclusive), and versions prior to 4.8.7.","status":"published","published":"2020-03-03T15:15:12.057Z","modified":"2026-11-04T07:07:07.340999233Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-04T07:32:23.735279Z"},{"id":"UBUNTU-CVE-2020-1893","description":"Insufficient boundary checks when decoding JSON in TryParse reads out of bounds memory, potentially leading to DOS. This issue affects HHVM 4.45.0, 4.44.0, 4.43.0, 4.42.0, 4.41.0, 4.40.0, 4.39.0, versions between 4.33.0 and 4.38.0 (inclusive), versions between 4.9.0 and 4.32.0 (inclusive), and versions prior to 4.8.7.","status":"published","published":"2020-03-03T15:15:00Z","modified":"2026-04-22T12:32:48.012517Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:23.344108Z"}]}}