{"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":"2026-05-04T13:45:06.151005Z","published":"2026-05-04T13:35:07.628Z","upstream":["CVE-2023-1999"],"database_specific":{"sources":[{"published":"2023-06-20T12:15:09.600Z","imported":"2026-05-03T08:43:14.502Z","database_specific":{"status":"Modified"},"html_url":"https://nvd.nist.gov/vuln/detail/CVE-2023-1999","modified":"2025-02-13T17:16:01.293Z","url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2023-1999","id":"CVE-2023-1999"}],"license":"CC-BY-4.0"},"references":[{"type":"WEB","url":"https://chromium.googlesource.com/webm/libwebp"},{"type":"WEB","url":"https://chromium.googlesource.com/webm/libwebp"},{"type":"WEB","url":"https://security.gentoo.org/glsa/202309-05"},{"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"}