---
title: "CVE-2026-114730: Roundcube Webmail - Server Side Request Forgery"
description: "Roundcube Webmail 1.6.14 before 1.6.20 and 1.7.0 before 1.7.5 contains a server-side request forgery filter bypass caused by incomplete network blocklist in rcube_utils::is_local_url(), letting attackers access internal network resources, exploit requires crafted URL with NAT64 prefix."
url: https://panop.io/threat-heartbeat/CVE-2026-114730/
---

# CVE-2026-114730 Roundcube Webmail - Server Side Request Forgery

Roundcube Webmail 1.6.14 before 1.6.20 and 1.7.0 before 1.7.5 contains a server-side request forgery filter bypass caused by incomplete network blocklist in rcube\_utils::is\_local\_url(), letting attackers access internal network resources, exploit requires crafted URL with NAT64 prefix.

CVSS base score 7.2 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.31% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-114730)

## Details

Type

Server Side Request Forgery

Impact

Server Side Request Forgery, Information Disclosure

CVSS vector

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

Published

22 October 2026

Updated

23 October 2026

Weakness

[CWE-918](https://cwe.mitre.org/data/definitions/918.html)

## Vendor fix

Upgrade to versions 1.6.20, 1.7.5 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-114730](https://nvd.nist.gov/vuln/detail/CVE-2026-114730)
- [https://github.com/roundcube/roundcubemail/commit/6e1d480e730a45f29829b6a11af608d5d6eb3db6](https://github.com/roundcube/roundcubemail/commit/6e1d480e730a45f29829b6a11af608d5d6eb3db6)
- [https://github.com/roundcube/roundcubemail/releases/tag/1.6.20](https://github.com/roundcube/roundcubemail/releases/tag/1.6.20)
- [https://github.com/roundcube/roundcubemail/releases/tag/1.7.5](https://github.com/roundcube/roundcubemail/releases/tag/1.7.5)
- [https://roundcube.net/news/2026/10/19/security-updates-1.6.20-and-1.7.5](https://roundcube.net/news/2026/10/19/security-updates-1.6.20-and-1.7.5)
- [https://bugs.debian.org/1151279](https://bugs.debian.org/1151279)
- [https://github.com/roundcube/roundcubemail/commit/3c3a65f66b53b7aaf3d720acd06e0b102eceb090](https://github.com/roundcube/roundcubemail/commit/3c3a65f66b53b7aaf3d720acd06e0b102eceb090)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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