Description
Roundcube Webmail before 1.5.13 and 1.6 before 1.6.13 allows Cascading Style Sheets (CSS) injection, e.g., because comments are mishandled.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Roundcube | Webmail | < 1.5.13, 1.6.0 – < 1.6.13 | 1.5.13 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | roundcube | 1.6.13+dfsg-1 | — |
| Debian 13 | roundcube | 1.6.13+dfsg-0+deb13u1 | DSA-6137-1 |
| Debian 12 | roundcube | 1.6.5+dfsg-1+deb12u7 | DSA-6137-1 |
| Debian 11 | roundcube | 1.4.15+dfsg.1-1+deb11u7 | DLA-4480-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | roundcube | No fix yet | — |
| Ubuntu 25.10 | roundcube | No fix yet | — |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 26.04 LTS | roundcube | No fix yet | — |
| Ubuntu Pro 24.04 LTS | roundcube | 1.6.6+dfsg-2ubuntu0.1+esm3 | — |
| Ubuntu Pro 22.04 LTS | roundcube | 1.5.0+dfsg.1-2ubuntu0.1~esm6 | — |
| Ubuntu Pro 20.04 LTS | roundcube | 1.4.3+dfsg.1-1ubuntu0.1~esm8 | — |
| Ubuntu Pro 18.04 LTS | roundcube | 1.3.6+dfsg.1-1ubuntu0.1~esm8 | — |
| Ubuntu Pro 16.04 LTS | roundcube | 1.2~beta+dfsg.1-0ubuntu1+esm8 | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 16.0 | roundcubemail | 1.6.13-bp160.1.1 | openSUSE-SU-2026:20323-1 |
Advisories 4
- WID-SEC-2026-0357 Roundcube: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 29, 2026
- openSUSE-SU-2026:20323-1 Security update for roundcubemail SUSE / openSUSE Security Updates · Mar 23, 2026
- DLA-4480-1 roundcube - security update Debian Security (DSA / DLA) · Feb 17, 2026
- DSA-6137-1 roundcube - security update Debian Security (DSA / DLA) · Feb 17, 2026
References
- https://roundcube.net/news/2026/02/08/security-updates-1.6.13-and-1.5.13
- https://github.com/roundcube/roundcubemail/releases/tag/1.6.13
- https://github.com/roundcube/roundcubemail/commit/1f4c3a5af5033747f9685a8a395dbd8228d19816
- https://github.com/roundcube/roundcubemail/commit/2b5625f1d2ef7e050fd1ae481b2a52dc35466447
- https://github.com/roundcube/roundcubemail/commit/53d75d5dfebef235a344d476b900c20c12d52b01
- https://github.com/roundcube/roundcubemail/releases/tag/1.5.13
- https://github.com/roundcube/roundcubemail/commit/bf89cbaa5897d8ad62e8057d9a3f6babb90b7954
- https://github.com/roundcube/roundcubemail/commit/5a3315cce587e0be58335d11ff9a5571c90494a5
- https://github.com/roundcube/roundcubemail/commit/c15f5dbf093a497e19a749b20e7f8fb5a9c24cde