How severe is CVE-2026-35545?

CVE-2026-35545 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2026-35545 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-35545?

CVE-2026-35545 affects Roundcube Webmail. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-35545?

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

Does CVE-2026-35545 have an EU (EUVD) identifier?

Yes. CVE-2026-35545 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18593.

When was CVE-2026-35545 published?

CVE-2026-35545 was published on 2026-04-03 and last updated on 2026-06-17.

CVE-2026-35545

CVE-2026-35545 is a medium-severity vulnerability in Roundcube Webmail with a CVSS 3.x base score of 5.3. 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-669.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-18593
Weakness: CWE-669
Affected product: Roundcube Webmail
Published: 2026-04-03
Last modified: 2026-06-17

Description

An issue was discovered in Roundcube Webmail before 1.5.15 and 1.6.15. The remote image blocking feature can be bypassed via SVG content in an e-mail message. This may lead to information disclosure or access-control bypass. This involves the animate element with attributeName=fill/filter/stroke.

Frequently asked questions

What is CVE-2026-35545?: An issue was discovered in Roundcube Webmail before 1.5.15 and 1.6.15. The remote image blocking feature can be bypassed via SVG content in an e-mail message. This may lead to information disclosure or access-control bypass. This involves the animate element with attributeName=fill/filter/stroke.
How severe is CVE-2026-35545?: CVE-2026-35545 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2026-35545 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-35545?: CVE-2026-35545 affects Roundcube Webmail. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-35545?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-35545 have an EU (EUVD) identifier?: Yes. CVE-2026-35545 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18593.
When was CVE-2026-35545 published?: CVE-2026-35545 was published on 2026-04-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*

More vulnerabilities in Roundcube Webmail

CVE-2008-5619 — Critical (CVSS 10.0): html2text.php in Chuggnutt HTML to Text Converter, as used in PHPMailer before 5.2.10, RoundCube Webmail…
CVE-2025-49113 — Critical (CVSS 9.9): Roundcube Webmail before 1.5.10 and 1.6.x before 1.6.11 allows remote code execution by authenticated users because the…
CVE-2024-37385 — Critical (CVSS 9.8): Roundcube Webmail before 1.5.7 and 1.6.x before 1.6.7 on Windows allows command injection via im_convert_path and…
CVE-2021-44026 — Critical (CVSS 9.8): Roundcube before 1.3.17 and 1.4.x before 1.4.12 is prone to a potential SQL injection via search or search_params.
CVE-2020-12641 — Critical (CVSS 9.8): rcube_image.php in Roundcube Webmail before 1.4.4 allows attackers to execute arbitrary code via shell metacharacters…
CVE-2020-12640 — Critical (CVSS 9.8): Roundcube Webmail before 1.4.4 allows attackers to include local files and execute code via directory traversal in a…

All CVEs affecting Roundcube Webmail →

Other CWE-669 vulnerabilities

CVE-2021-30120 — Critical (CVSS 9.9): Kaseya VSA before 9.5.7 allows attackers to bypass the 2FA requirement. The need to use 2FA for authentication in…
CVE-2025-67895 — Critical (CVSS 9.8): Edge3 Worker RPC RCE on Airflow 2. This issue affects Apache Airflow Providers Edge3: before 2.0.0 - and only if you…
CVE-2022-4446 — Critical (CVSS 9.8): PHP Remote File Inclusion in GitHub repository tsolucio/corebos prior to 8.0.
CVE-2020-24683 — Critical (CVSS 9.8): The affected versions of S+ Operations (version 2.1 SP1 and earlier) used an approach for user authentication which…
CVE-2020-5800 — Critical (CVSS 9.8): The Eat Spray Love mobile app for both iOS and Android contains logic that allows users to bypass authentication and…
CVE-2020-15892 — Critical (CVSS 9.8): An issue was discovered in apply.cgi on D-Link DAP-1520 devices before 1.10b04Beta02. Whenever a user performs a login…

Browse all CWE-669 vulnerabilities →