{"id":"JLSEC-2026-440","details":"There exists a use after free/double free in libwebp. An attacker can use the ApplyFiltersAndEncode() function and loop through to free best.bw and assign best = trial pointer. The second loop will then return 0 because of an Out of memory error in VP8 encoder, the pointer is still assigned to trial and the AddressSanitizer will attempt a double free.","modified":"2026-07-18T00:02:04.335155508Z","published":"2026-05-04T13:35:07.628Z","upstream":["CVE-2023-1999"],"database_specific":{"license":"CC-BY-4.0","sources":[{"id":"CVE-2023-1999","imported":"2026-07-17T21:54:09.119Z","modified":"2026-06-17T05:29:14.063Z","published":"2023-06-20T12:15:09.600Z","url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2023-1999","html_url":"https://nvd.nist.gov/vuln/detail/CVE-2023-1999","database_specific":{"status":"Modified"}}]},"references":[{"type":"WEB","url":"https://chromium.googlesource.com/webm/libwebp"},{"type":"WEB","url":"https://security.gentoo.org/glsa/202309-05"}],"affected":[{"package":{"name":"libwebp_jll","ecosystem":"Julia","purl":"pkg:julia/libwebp_jll?uuid=c5f90fcd-3b7e-5836-afba-fc50a0988cb2"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.3.2+0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-440.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}