MGASA-2026-0065

Fix pre-auth arbitrary file write via unsafe deserialization in redis/memcache session handler, reported by y0us. Fix bug where a password could get changed without providing the old password, reported by flydragon777. Fix IMAP Injection + CSRF bypass in mail search, reported by Martila Security Research Team. Fix remote image blocking bypass via various SVG animate attributes, reported by nullcathedral. Fix remote image blocking bypass via a crafted body background attribute, reported by nullcathedral. Fix fixed position mitigation bypass via use of !important, reported by nullcathedral. Fix XSS issue in a HTML attachment preview, reported by aikido_security. Fix SSRF + Information Disclosure via stylesheet links to a local network hosts, reported by Georgios Tsimpidas (aka Frey), Security Researcher at https://i0.rs/.