{"id":"JLSEC-2026-856","details":"A flaw was found in ImageMagick in `coders/txt.c`. An attacker who submits a crafted file that is processed by ImageMagick could trigger undefined behavior in the form of values outside the range of type `unsigned long long`. This would most likely lead to an impact to application availability, but could potentially cause other problems related to undefined behavior. This flaw affects ImageMagick versions prior to 7.0.8-68.","modified":"2026-07-30T18:23:46.339203319Z","published":"2026-07-30T16:02:27.435Z","upstream":["CVE-2020-27758"],"database_specific":{"license":"CC-BY-4.0","sources":[{"imported":"2026-07-30T14:08:42.690Z","modified":"2026-06-17T03:09:35.343Z","published":"2020-12-08T22:15:18.507Z","url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2020-27758","html_url":"https://nvd.nist.gov/vuln/detail/CVE-2020-27758","database_specific":{"status":"Modified"},"id":"CVE-2020-27758"}]},"references":[{"type":"WEB","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1894236"},{"type":"WEB","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1894236"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2021/03/msg00030.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2021/03/msg00030.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2023/03/msg00008.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2023/03/msg00008.html"}],"affected":[{"package":{"name":"ImageMagick_jll","ecosystem":"Julia","purl":"pkg:julia/ImageMagick_jll?uuid=c73af94c-d91f-53ed-93a7-00f77d67a9d7"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"6.9.12+0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-856.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V2","score":"AV:N/AC:M/Au:N/C:N/I:N/A:P"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L"}]}