Roundcube, a webmail frontend, released a security update on Oct 19 as versions 1.6.20 (LTS) and 1.7.5. The release announcement at <https://roundcube.net/news/2026/10/19/security-updates-1.6.20-and-1.7.5> lists multiple command/header injection, XSS/SSRF, and miscellaneous vulnerabilities:
* Fix IMAP command injection via CRLF in _uid parameter of mail/headers and mail/viewsource action, reported by Wahab “NeoX” K. * Fix bug where an alias login wasn’t qualified by IMAP host, reported by Milan Hoppe. * Add a size limit to the CSS proxy content processing, reported by Milan Hoppe. * Fix SSRF filter (is_local_url()) bypass via NAT64 64:ff9b::/96, reported by dizconnect. * Fix remote content blocking bypass via SVG SMIL by attribute, reported by Milan Hoppe. * Fix remote content blocking bypass via CSS escapes in FuncIRI attributes (again), reported by Milan Hoppe. * Fix passing potentally unsafe attachment content into ImageMagick on image resize, reported by Paulos Yibelo * Fix mail header injection via the From display-name in the Bounce (resend) action, reported by Clay. * Fix mail header injection via References/In-Reply-To/Message-ID/From parameters, reported by Sunil Tripathy. * Fix object injection primitive in rcube_session::unserialize() via “!”-prefixed session keys, reported by Oli Z. * Fix ImageMagick resource limits bypass by GD fallback during thumbnail generation, reported by GoldenSW. * Fix CSS scoping bypass in HTML messages using at-rules, reported by GoldenSW. * Fix bug where deprecated action aliases bypassed disabled_actions setting, reported by Squirt1e, Atum, N0b0dy, and Gh0u1L5. * Fix IMAP command injection via CRLF in _flag parameter of mail/mark action, reported by Squirt1e, Atum, N0b0dy, and Gh0u1L5. * Fix CSRF validation bypass in the mark-as-junk action, reported by Squirt1e, Atum, N0b0dy, and Gh0u1L5. * Fix XSS issue in handling of password driver error responses, reported by Squirt1e, Atum, N0b0dy, and Gh0u1L5. * Fix mail header injection via subject of a message forwarded as attachment, reported by Squirt1e, Atum, N0b0dy, and Gh0u1L5. * Fix mail header injection via media type in an inline image data URI, reported by Squirt1e, Atum, N0b0dy, and Gh0u1L5. * Fix bug where Password Modoboa driver could change password for another account, reported by Squirt1e, Atum, N0b0dy, and Gh0u1L5. * Fix unsafe use of a login name in SquirrelMail import file path, reported by Squirt1e, Atum, N0b0dy, and Gh0u1L5. No CVE indications were given in the post. -valtteri
