CVE-2026-48842Network attack vector

Pre-auth SQL injection via replacement backslash bypass

Published May 25, 2026 · Updated May 25, 2026

SQL injection in Roundcube Webmail 1.6.0 through 1.6.15 and 1.7.0 allows remote attackers to read or alter database data. The virtuser_query plugin passes an escaped username or email through preg_replace replacement processing before inserting it into configured SQL and executing the query, allowing backslashes to change the replacement result. The plugin must be enabled and configured for database-backed identity lookup; no Roundcube account or user interaction is required.

CVSS severity8.1
High
EPSS probability0.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SQL injection in Roundcube Webmail 1.6.0 through 1.6.15 and 1.7.0 allows remote attackers to read or alter database data. The virtuser_query plugin passes an escaped username or email through preg_replace replacement processing before inserting it into configured SQL and executing the query, allowing backslashes to change the replacement result. The plugin must be enabled and configured for database-backed identity lookup; no Roundcube account or user interaction is required.

The record

CVE
CVE-2026-48842
Published
May 25, 2026
Updated
May 25, 2026
Vendor
Roundcube
Product
Roundcube Webmail
Classifications
CWE-89, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 25, 2026CVE publishedPublication date reported by the CVE source.
  2. May 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.6.0 <1.6.16
  2. Affected versionversion=1.7.0 <1.7.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Roundcube · Roundcube Webmailversion=1.6.0 <1.6.16; version=1.7.0 <1.7.1

Published CVSS scores

8.1MITRECVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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