CVE-2026-25916: Roundcube Webmail before 1.5.13 and 1.6 before 1.6.13, when "Block remote images" is used, does not block SVG feImage

Medium severity · published Feb 9, 2026

CVE-2026-25916

Roundcube Webmail before 1.5.13 and 1.6 before 1.6.13, when "Block remote images" is used, does not block SVG feImage

4.3

CVSS

0.8%

EPSS

On KEV

Description

Roundcube Webmail before 1.5.13 and 1.6 before 1.6.13, when "Block remote images" is used, does not block SVG feImage.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Attack vector

Network

Complexity

Low

Privileges

None

User interaction

Required

Confidentiality

Low

Integrity

None

Availability

None

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)0.8% · higher than 55% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

Webmail · Roundcube

before 1.5.13; 1.6.0 before 1.6.13 · source: vendor

Affected product

Webmail

Roundcube

All Webmail CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-25916

CVE.org

https://www.cve.org/CVERecord?id=CVE-2026-25916

github.com

https://github.com/roundcube/roundcubemail/commit/26d7677

news.ycombinator.com

https://news.ycombinator.com/item?id=46937012

nullcathedral.com

https://nullcathedral.com/posts/2026-02-08-roundcube-svg-feimage-remote-image-bypass/