7.1

CVE-2026-113386: roundcube webmail CRLF Injection

CVSS: 7.1v3.1HighAwaiting analysis
AliasesDEBIAN-CVE-2026-113386
Published 20-10-2026Last modified 20-10-2026
Open JSON

Vulnerability summary

CVE-2026-113386 is a high (CVSS 7.1) CRLF Injection vulnerability in roundcube webmail. EPSS estimates a 0.97% chance of exploitation in the next 30 days, higher than 61.3% of scored vulnerabilities.

Overall risk
29/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.1/10
010
High · v3.1 (CVE.org)
EPSS score
0.97%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 20-10-2026
    PublishedVulnerability first disclosed.

Description

Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 are affected by IMAP command injection. A remote authenticated attacker can exploit this via CRLF sequences injected into the _uid parameter of the mail/headers and mail/viewsource actions to execute arbitrary IMAP commands.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.97%

Chance of exploitation in the next 30 days

Percentile

61%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

20-10-202620-10-2026
EPSS score
0.97%

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
  • roundcubeAll versions (No fix recorded)
Roundcube1 product
  • webmail≥ 1.6.0, < 1.6.20 | ≥ 1.7.0, < 1.7.5

2 vendors · 2 products

References

8 links