MSRXVulnerabilities / CVE-2026-114731
CVE-2026-114731
Published 2026-10-22 · Undergoing Analysis
CVE-2026-114731
5.3 MEDIUM
CVSS 3.1 · CNA · mitre.org
CVSS 3.1 · CNA · mitre.org
0.4%
chance of exploitation in the next 30 days (EPSS; higher than 37% of CVEs)
chance of exploitation in the next 30 days (EPSS; higher than 37% of CVEs)
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 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.
Scores
Affected products
- Roundcube Webmail: 1.6.0 to < 1.6.20; 1.7.0 to < 1.7.5
Weakness: CWE-770
6 references (advisories, patches, write-ups)
- https://bugs.debian.org/1151279
- https://github.com/roundcube/roundcubemail/commit/2c9f6da692fa37cad2aaf85d5b127b583d22b264
- https://github.com/roundcube/roundcubemail/commit/99a5bdd05b01f45493cc0da4c96968eac7668126
- https://github.com/roundcube/roundcubemail/releases/tag/1.6.20
- https://github.com/roundcube/roundcubemail/releases/tag/1.7.5
- https://roundcube.net/news/2026/10/19/security-updates-1.6.20-and-1.7.5
Sources: NVD, CVE.org, OSV.dev, FIRST EPSS. Missing ones did not answer or have no record yet.