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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-18487
StatePUBLISHED
Assignerfedora
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-06 22:16:50 UTC
Updated2026-08-07 16:17:22 UTC
DescriptionA 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.

Risk And Classification

Primary CVSS: v3.1 5.4 MEDIUM from [email protected]

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

EPSS: 0.003180000 probability, percentile 0.242210000 (date 2026-08-07)

Problem Types: CWE-451 | CWE-451 User Interface (UI) Misrepresentation of Critical Information

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
3.1CNACVSS5.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA GNOME Epiphany affected 49.2 * semver Not specified

References

ReferenceSourceLinkTags
gitlab.gnome.org/GNOME/epiphany/-/commit/0dde1d369458ac5c44b74b5ad3c433f825f6f8af [email protected] gitlab.gnome.org
access.redhat.com/security/cve/CVE-2026-18487 [email protected] access.redhat.com
gitlab.gnome.org/GNOME/epiphany/-/work_items/2897 [email protected] gitlab.gnome.org
bugzilla.redhat.com/show_bug.cgi [email protected] bugzilla.redhat.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Red Hat would like to thank Fernando Munoz for reporting this issue. (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-07-10T00:00:00.000ZReported to Red Hat.
CNA2026-07-07T00:00:00.000ZMade public.

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