Vulnerability · CVE-2026-26079
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.
Published Feb 11, 2026 · catalog updated Feb 11, 2026 · Roundcube Webmail
Last checked Nov 3, 2026. A connected source was read within the last 7 days.
Check if you run it
No confirmed exploitation is on record for CVE-2026-26079. EPSS is 0.35%. Act only if a listed version of Roundcube Webmail is installed.
Gaps on this record
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
Same product and reporting
- CVE-2026-48842 · High · known exploited
- CVE-2026-25916 · Medium
- CVE-2025-68460 · High
- CVE-2025-68461 · High · known exploited
- CVE-2013-1904 · Unknown · known exploited
- Severity
- Medium4.7
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.35%
- Remediation
- Version ranges on file
- Affected products
- vendor Roundcube Webmail 0 <1.5.13
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.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- vendor Roundcube Webmail 0 <1.5.130 <1.5.13
How to fix CVE-2026-26079
Upgrade
CVE-2026-26079 lists a fix boundary at 1.5.13. Compare the installed build with that boundary before you change production.
Version check
Seen in 0 <1.5.13
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2026-26079. EPSS is 0.35%. Act only if a listed version of Roundcube Webmail is installed.
Which versions are affected?
Compare what you have installed with Roundcube Webmail 0 <1.5.13 0 <1.5.13. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
No weakness class is stored. EPSS 0.35%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
Timeline
Detection, updates, and resolution for this record.
Feb 11, 2026 · EUVD
Detected
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.
Feb 11, 2026 · EUVD
Updated
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.
Sources
- FIRST EPSSExploitation probabilityCVE-2026-26079
30-day exploitation probability 0.35%
first.org - EUVDVulnerability recordEUVD-2026-5945
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.
euvd.enisa.europa.eu
References
Freshness
Last verified in this catalog Nov 3, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- FIRST EPSSNov 3, 2026
- EUVDNov 3, 2026