{"id":"CVE-2020-26148","aliases":["DEBIAN-CVE-2020-26148","EUVD-2020-18775","GHSA-8cq8-p477-7hrv","UBUNTU-CVE-2020-26148"],"status":"published","title":"md_push_block_bytes in md4c.c in md4c 0.4.5 allows attackers to trigger use of uninitialized...","description":"md_push_block_bytes in md4c.c in md4c 0.4.5 allows attackers to trigger use of uninitialized memory, and cause a denial of service (e.g., assertion failure) via a malformed Markdown document.","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":"2026-11-10","score":0.01423,"percentile":0.73107,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-908"],"published":"2020-09-29T18:48:41Z","modified":"2026-10-26T12:02:40Z","fixes":[{"ecosystem":"Debian:12","package":"md4c","fixed_in":["0.4.5-2"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"md4c","fixed_in":["0.4.5-2"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"md4c","fixed_in":["0.4.5-2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"md4c","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.4.5-2"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"md4c","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.4.5-2"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"md4c","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.4.5-2"}]}]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"md4c","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.3.4-1","0.4.1-1","0.4.2-1","0.4.3-1"]}],"products":[{"vendor":"md4c_project","product":"md4c"}],"references":[{"url":"https://github.com/mity/md4c/issues/130","tags":["x_refsource_MISC","x_transferred","Exploit","Patch","Third Party Advisory","fix","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-26148"},{"url":"https://github.com/advisories/GHSA-8cq8-p477-7hrv"},{"url":"https://security-tracker.debian.org/tracker/CVE-2020-26148","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2020-26148","tags":["report"]},{"url":"https://github.com/mity/md4c/commit/22ca89a3008966c4316d6b0a158b1a49f9038df0","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-26148","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2020-26148","description":"md_push_block_bytes in md4c.c in md4c 0.4.5 allows attackers to trigger use of uninitialized memory, and cause a denial of service (e.g., assertion failure) via a malformed Markdown document.","status":"published","published":"2020-09-29T18:48:41Z","modified":"2024-08-04T15:49:07.155Z","updated_at":"2026-11-02T14:35:46.129376Z"}],"euvd":[{"id":"EUVD-2020-18775","description":"md_push_block_bytes in md4c.c in md4c 0.4.5 allows attackers to trigger use of uninitialized memory, and cause a denial of service (e.g., assertion failure) via a malformed Markdown document.","status":"published","published":"2020-09-29T18:48:41Z","modified":"2024-08-04T15:49:07Z","updated_at":"2026-11-03T03:07:15.778249Z"}],"ghsa":[{"id":"GHSA-8cq8-p477-7hrv","title":"md_push_block_bytes in md4c.c in md4c 0.4.5 allows attackers to trigger use of uninitialized...","description":"md_push_block_bytes in md4c.c in md4c 0.4.5 allows attackers to trigger use of uninitialized memory, and cause a denial of service (e.g., assertion failure) via a malformed Markdown document.","status":"published","published":"2022-05-24T17:29:51Z","modified":"2023-01-29T05:04:16Z","updated_at":"2026-11-02T14:45:30.813688Z"}],"nvd":[{"id":"CVE-2020-26148","description":"md_push_block_bytes in md4c.c in md4c 0.4.5 allows attackers to trigger use of uninitialized memory, and cause a denial of service (e.g., assertion failure) via a malformed Markdown document.","status":"published","published":"2020-09-30T18:15:26.96Z","modified":"2026-06-17T03:07:42.963Z","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-908"],"updated_at":"2026-11-02T14:06:17.70091Z"}],"osv":[{"id":"CVE-2020-26148","description":"md_push_block_bytes in md4c.c in md4c 0.4.5 allows attackers to trigger use of uninitialized memory, and cause a denial of service (e.g., assertion failure) via a malformed Markdown document.","status":"published","published":"2020-09-30T18:15:26.96Z","modified":"2026-10-20T10:52:55.390210676Z","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":"2026-11-02T15:44:15.879068Z"},{"id":"DEBIAN-CVE-2020-26148","description":"md_push_block_bytes in md4c.c in md4c 0.4.5 allows 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