phpseclib before 2.0.31 and 3.x before 3.0.7 mishandles RSA PKCS#1 v1.5 signature verification.
https://github.com/phpseclib/phpseclib/pull/1635
https://github.com/phpseclib/phpseclib/releases/tag/2.0.31
https://github.com/phpseclib/phpseclib/releases/tag/3.0.7
https://lists.debian.org/debian-lts-announce/2022/11/msg00024.html
https://lists.debian.org/debian-lts-announce/2022/11/msg00025.html