4.7

CVE-2026-54432: roundcube webmail Cross-site Scripting

CVSS: 4.7v3.1MediumAwaiting analysis
AliasesUBUNTU-CVE-2026-54432DEBIAN-CVE-2026-54432
Published 14-07-2026Last modified 15-07-2026
Open JSON

Vulnerability summary

CVE-2026-54432 is a medium (CVSS 4.7) Cross-site Scripting vulnerability in roundcube webmail. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 10.1% of scored vulnerabilities.

Overall risk
19/100
0100
Low · default modelHow is this calculated?
CVSS score
4.7/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.21%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 3 · Related 1
MGASA-2026-0332MGASA-2026-0333OPENSUSE-SU-2026:12169-1

Timeline

  1. 14-07-2026
    PublishedVulnerability first disclosed.
  2. 15-07-2026
    Last modifiedVulnerability information updated.

Description

Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2 allows Stored Cross-Site Scripting (XSS). The issue occurs because the attachment MIME type is not properly escaped on the attachment-validation warning page.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.21%

Chance of exploitation in the next 30 days

Percentile

10%

Versus all other CVEs

30-day change

0.00 pp

From 0.21% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.21%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • roundcube< 1.6.5+dfsg-1+deb12u10 | < 1.6.17+dfsg-0+deb13u1 | < 1.6.17+dfsg-1
Roundcube1 product
  • webmail≥ 1.6.0, < 1.6.17 | ≥ 1.7.0, < 1.7.2
Ubuntu1 product
  • roundcubeAll versions (No fix recorded)

3 vendors · 3 products

References

5 links