Security updates 1.7-rc5, 1.6.14 and 1.5.13 released

Published: 18 March 2026

We just published security updates to the 1.6 and 1.5 LTS versions of Roundcube Webmail, as well as a release candidate for coming 1.7. They contain fixes for recently reported set of security vulnerabilities.

Security fixes

  • 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/.

See the full changelogs in the release notes on the Github download pages for the updated versions

We strongly recommend to update your productive installations of Roundcube with this new versions.

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