Epiphany: address bar / host spoofing via userinfo in ephy_uri_get_decoded_host()

Description

A flaw was found in Epiphany. An issue in how the browser reads web addresses allows attackers to fake the domain name shown in the address bar. If a user clicks a specially crafted link containing a colon (for example, [https://trusted.com:[email protected]/](https://trusted.com:[email protected]/)), the address bar and security menus will display the safe website (trusted.com) but it will actually load the attacker website (attacker.com) on the screen. This allows attackers to create convincing phishing pages to trick users into trusting a malicious site.

Scores

EPSS (exploitation in 30 days)

0.34% · top 73% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.4.

Weakness

• CWE-451: User Interface (UI) Misrepresentation of Critical Information (opens in a new tab)All about CWE-451 and its CVEs

Affected products

• GNOME · Epiphany

  • affected 49.2 – < *

References (4)

• https://access.redhat.com/security/cve/CVE-2026-18487 (opens in a new tab)vdb-entryx_refsource_REDHAT
• RHBZ#2509570 (opens in a new tab)issue-trackingx_refsource_REDHAT
• https://gitlab.gnome.org/GNOME/epiphany/-/commit/0dde1d369458ac5c44b74b5ad3c433f825f6f8af (opens in a new tab)
• https://gitlab.gnome.org/GNOME/epiphany/-/work_items/2897 (opens in a new tab)

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2026-18487](https://trackcve.app/badge/CVE-2026-18487.svg)](https://trackcve.app/cve/CVE-2026-18487)

Record last updated 7 Aug 2026, 15:39 UTC.