{"id":"AZL-89516","summary":"CVE-2026-40930 affecting package optipng 0.7.8-5","details":"LIBPNG is a reference library for use in applications that process PNG (Portable Network Graphics) raster image files. In version 1.8.0, three inter-frame chunk discard paths in the push-mode APNG parser clear the chunk-header flag without consuming the chunk body and CRC, allowing attacker-controlled bytes inside an ignored ancillary chunk to be reinterpreted as a fresh chunk header on the next call to `png_process_data`. Commit faf06924688b62d7c1654b5ceddedbde66ffadb4 fixes the issue.","modified":"2026-08-30T05:24:52Z","published":"2026-06-04T16:16:36Z","upstream":["CVE-2026-40930"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40930"}],"affected":[{"package":{"name":"optipng","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/optipng"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"0.7.8-5"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-89516.json"}}],"schema_version":"1.9.0"}