How severe is CVE-2026-48849?

CVE-2026-48849 has a CVSS 3.x base score of 4.4, rated medium severity. It is exploitable over network with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-48849 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-48849?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-48849 have an EU (EUVD) identifier?

Yes. CVE-2026-48849 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31728.

When was CVE-2026-48849 published?

CVE-2026-48849 was published on 2026-05-25 and last updated on 2026-06-17.

CVE-2026-48849

CVE-2026-48849 is a medium-severity vulnerability with a CVSS 3.x base score of 4.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 4.4)
EPSS exploit prediction: 0% (15th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-31728
Weakness: CWE-79
Published: 2026-05-25
Last modified: 2026-06-17

Description

In Roundcube Webmail 1.6.x before 1.6.16 and 1.7.x before 1.7.1, an unsanitized subject field in the draft restored value could lead to stored XSS/HTML/CSS injection on shared mailboxes.

Frequently asked questions

What is CVE-2026-48849?: In Roundcube Webmail 1.6.x before 1.6.16 and 1.7.x before 1.7.1, an unsanitized subject field in the draft restored value could lead to stored XSS/HTML/CSS injection on shared mailboxes.
How severe is CVE-2026-48849?: CVE-2026-48849 has a CVSS 3.x base score of 4.4, rated medium severity. It is exploitable over network with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-48849 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-48849?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-48849 have an EU (EUVD) identifier?: Yes. CVE-2026-48849 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31728.
When was CVE-2026-48849 published?: CVE-2026-48849 was published on 2026-05-25 and last updated on 2026-06-17.

References

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