KDE Okular before 1.10.0 allows code execution via an action link in a PDF document.
invent.kde.org/kde/okular/-/commit/6a93a033b4f9248b3cd4d04689b8391df754e244
kde.org/info/security/advisory-20200312-1.txt
lists.debian.org/debian-lts-announce/2020/03/msg00033.html
lists.debian.org/debian-lts-announce/2021/12/msg00019.html
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2TY3O6UWX2XTP7PISPTZ6FYRDFU4UF66/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AW6GJ3AKGXOMTDHNZBMSXDTWNJJRFBDH/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/G3HL3F6JLCSRLPFZ47735F5STPJWDVR4/
security.gentoo.org/glsa/202007-47