dbcve.org
SQL InjectionWeakness · CWE-89

CVE-2026-48842

HIGH · 8.1 CVSS v3.1 Published 2026-05-25
Patch available
A vendor patch is available. No clean upgrade release — apply the published patch.
See remediation →
90/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Roundcube Webmail 1.6.x before 1.6.16 and 1.7.x before 1.7.1 has Pre-authentication SQL injection in the virtuser_query plugin via a preg_replace() backslash escape bypass.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis
How this class of weakness works · CWE-89

User input is woven into a database query, letting an attacker rewrite the query's logic. From there they can read, alter, or destroy data — frequently the entire database. The reliable fix is parameterised queries (prepared statements), so input is always treated as data and never as SQL.

General guidance for the sql injection class — the official description and references above are authoritative for this specific CVE. Want a bespoke review and a reviewed fix? Ask our team →

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Patch available Apply the vendor patch
Vendor patch github.com →
Recommended fix High confidence

Roundcube Webmail 1.6.16 or 1.7.1 (or later) - choose the appropriate branch based on your current major version

  1. Identify the currently installed Roundcube Webmail version by checking the version file or program metadata
  2. If running 1.6.x, confirm the version is before 1.6.16; if running 1.7.x, confirm the version is before 1.7.1
  3. Download the fixed release (1.6.16 or 1.7.1 or later) from the official Roundcube repository at https://github.com/roundcube/roundcubemail/releases
  4. Backup the existing Roundcube installation and database before upgrading
  5. Extract the new version and replace the existing files, preserving local configuration
  6. Verify the upgrade was successful by checking the new version number
  7. Test that webmail functionality works correctly after the upgrade
Caveat Standard upgrade within same major version should not introduce breaking changes; always review the release notes for any configuration or feature changes

Generated from the published advisory — verify against the referenced sources before acting.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-48842 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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