{"id":"CVE-2026-114731","title":"Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by an uncontrolled resource consumption vulnerability in the CSS proxy (the utils/modcss action)","summary":"Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by an uncontrolled resource consumption vulnerability in the CSS proxy (the utils/modcss action). The fetched stylesheet was read into memory in full, with no size limit …","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","cvssSource":"cna","cwe":["CWE-770"],"vendor":"Roundcube","product":"Webmail","affected":["Webmail >= 1.6.0 < 1.6.20","Webmail >= 1.7.0 < 1.7.5"],"published":"2026-10-22","updated":"2026-10-22","sourceUpdated":"2026-10-22T02:12:34.577Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-114731","references":[{"url":"https://bugs.debian.org/1151279"},{"url":"https://github.com/roundcube/roundcubemail/commit/2c9f6da692fa37cad2aaf85d5b127b583d22b264"},{"url":"https://roundcube.net/news/2026/10/19/security-updates-1.6.20-and-1.7.5"},{"url":"https://github.com/roundcube/roundcubemail/releases/tag/1.7.5"},{"url":"https://github.com/roundcube/roundcubemail/releases/tag/1.6.20"},{"url":"https://github.com/roundcube/roundcubemail/commit/99a5bdd05b01f45493cc0da4c96968eac7668126"}],"tags":["cve.org"],"ingestedAt":"2026-10-22T03:25:15.662Z","slug":"CVE-2026-114731","body":"## Overview\n\nRoundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by an uncontrolled resource consumption vulnerability in the CSS proxy (the utils/modcss action). The fetched stylesheet was read into memory in full, with no size limit and no read timeout, so a stylesheet URL referencing an attacker-controlled host could be used to exhaust server memory. Upstream fixed this in the commit “Add a size limit to the CSS proxy content processing”, which caps the response at 5 MB, reads it as a stream and applies a read timeout.\n\n## Affected\n\n- `Webmail >= 1.6.0 < 1.6.20`\n- `Webmail >= 1.7.0 < 1.7.5`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}