CVE-2026-35542: Roundcube: Bypass of remote image blocking via crafted BODY background attribute

medium Affects roundcube/roundcubemail. Feed 2026.10.29.2, updated 2026-10-29; published 2026-04-03; advisory modified 2026-04-04.

Roundcube: Bypass of remote image blocking via crafted BODY background attribute

Package: roundcube/roundcubemail Composer
Affected versions: >=1.7-beta and <1.7-rc5
Fixed in: 1.7-rc5
Severity: medium CVSS 5.3
Exploitation: not on CISA KEV · EPSS 0% (34.4th percentile)
Published: 2026-04-03
Source: osv.dev

References

CWE-669

NVD record roundcube/roundcubemail advisories

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