Multiple vulnerabilities in Roundcube (July 6, 2026)

unknownpublic exploitCVE-2026-54432 CVE-2026-54433

Multiple vulnerabilities have been discovered in Roundcube. Some of them allow an attacker to cause a remote denial of service, server-side request forgery (SSRF), and indirect remote code injection (XSS).

CSIRTS triage

vendor: Roundcube product: Roundcube Denial of service Server-side request forgery Cross-site scripting

What: Multiple vulnerabilities allow an attacker to cause a remote denial of service, server-side request forgery (SSRF), and indirect remote code injection (XSS).
Who is affected: Deployments of Roundcube are affected.
Urgency: Remediation is urgent due to the potential for remote denial of service and code injection.
Action: Apply patches for the identified vulnerabilities.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: CERT-FR Avis de sécurité (FR · national-cert · site)
Severity: unknown
Published: 2026-07-06
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-0835/

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-544320.22% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 13% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-544330.31% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 24% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-54432	coverage & exploitation status	NVD · CVE.org
CVE-2026-54433	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Roundcube

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

high[NEW] [high] Roundcube Webmail: Multiple vulnerabilitiescert-bund · 2026-08-18
mediumCVE-2026-75010: In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, the modoboa driver of the password …nvd · 2026-08-17
mediumCVE-2026-75007: In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, the LDAP search filter was subject …nvd · 2026-08-17
mediumCVE-2026-75006: In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, insufficient Cascading Style Sheets…nvd · 2026-08-17
mediumCVE-2026-75004: In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, improper rule name quoting could le…nvd · 2026-08-17
mediumCVE-2026-75003: In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, an unclosed url() in a FuncIRI attr…nvd · 2026-08-17