Threat Intelligence / CVE / CVE-2026-48847

CVE-2026-48847 — Roundcube Webmail

CVSS v3.1 3.7 (LOW) · EPSS 0.0% (higher than 17.9% of all scored CVEs) · Priority 2.6/10 · Published 2026-05-25

As of 2026-05-26, CVE-2026-48847 is a LOW-severity vulnerability in Roundcube Webmail, CVSS v3.1 3.7, EPSS 0.0% (17.9th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-48847, most recently “Roundcube Webmail Pre-Auth SQL Injection in virtuser_query Plugin (CVE-2026-48842) — Patched in 1.6.16 / 1.7.1 Alongside 7 Other Vulnerabilities”.

Last updated: 2026-05-26

What is CVE-2026-48847?

Roundcube Webmail 1.6.x before 1.6.16, and 1.7.x before 1.7.1 allows pre-authentication arbitrary file deletion via redis/memcache session poisoning bypass.

The record classifies CVE-2026-48847 under weakness class CWE-669. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 110 days ago.

Severity and exploitation probability

CVSS v3.1 base score: 3.7 — LOW
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
EPSS (FIRST): 0.0% probability of exploitation in the next 30 days, higher than 17.9% of all scored CVEs
CISA KEV: Not listed in the CISA Known Exploited Vulnerabilities catalog
Threadlinqs priority: 2.6/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
Published: 2026-05-25, last modified 2026-05-26

Is CVE-2026-48847 being exploited?

It currently carries a trending score of 12 in the Threadlinqs vulnerability feed.

Affected products and versions

Roundcube: Webmail

How to fix CVE-2026-48847

No vendor patch reference has been recorded for CVE-2026-48847 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

Threat activity tracking CVE-2026-48847

1 tracked threat in the Threadlinqs corpus references CVE-2026-48847, either in the campaign’s CVE list or as an indicator on the campaign record.

Roundcube Webmail Pre-Auth SQL Injection in virtuser_query Plugin (CVE-2026-48842) — Patched in 1.6.16 / 1.7.1 Alongside 7 Other Vulnerabilities — HIGH · 2026-05-28

Sources

Seeded from cveorg and not yet processed by the Threadlinqs enrichment pipeline, so blank CVSS, EPSS or KEV fields above mean NOT MEASURED rather than measured-absent.

Full detection coverage & IOCs for threats exploiting CVE-2026-48847 are available via the Threadlinqs MCP server (Purple tier). View plans →

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