# CVE-2026-114730: roundcube: Roundcube Webmail 1.6.14 before 1.6.20 and 1.7.0 before 1.7.5 is affected by a server-side request forgery filter bypass

CVE-2026-114730 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-114730, released October 24, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-114730
- Priority: High
- CVSS: 7.2 (high)
- EPSS: 0.0037
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 22, 2026

## Description

Roundcube Webmail 1.6.14 before 1.6.20 and 1.7.0 before 1.7.5 is affected by a server-side request forgery filter bypass. The network blocklist used by rcube_utils::is_local_url() omitted the RFC 6052 NAT64 prefix 64:ff9b::/96, the RFC 8215 local-use NAT64 prefix 64:ff9b:1::/48 and the unspecified address ::/128, so URLs such as http://[64:ff9b::7f00:1]/ passed the filter and reached loopback, link-local and cloud metadata addresses. Upstream fixed this in the commit “Fix SSRF filter (is_local_url()) bypass via NAT64 64:ff9b::/96”.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | roundcube Debian 13.5 (trixie) | 1.6.20+dfsg-0+deb13u1 | [DEBIAN-CVE-2026-114730](https://patchblox.com/security/data/fix/linux/debian-cve-2026-114730.md) | Oct 24, 2026 |
| Linux | roundcube Debian 14 | 1.6.20+dfsg-1 | [DEBIAN-CVE-2026-114730](https://patchblox.com/security/data/fix/linux/debian-cve-2026-114730.md) | Oct 24, 2026 |
| Linux | roundcubemail Fedora 43 | 1.6.20-1.fc43 | [FEDORA-2026-DB7E033531](https://patchblox.com/security/data/fix/linux/fedora-2026-db7e033531.md) | Nov 7, 2026 |

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Data as of 2026-11-10T01:44:33Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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