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    CVE-2025-3839

    A flaw was found in Epiphany, a tool that allows websites to open external URL handler applications with minimal user interaction. This design can be misused to exploit vulnerabilities within those handlers, making them appear remotely exploitable. The browser fails to properly warn or gate this action, resulting in potential code execution on the client device via trusted UI behavior.

    Published:Jan 23, 2026
    Last Modified:Apr 15, 2026
    EPS:Jan 23, 2026
    EPSS Score:0.00018
    CVSS Score:8

    Affected Products

    Vendor
    Gnome
    Product
    Epiphany

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-77679 (CVSS 5.5) — A path traversal (ZIP slip) vulnerability exists in Epiphany when installing WebExtension packages from .xpi f…
    CVE-2026-77682 (CVSS 7.1) — A code injection vulnerability exists in Epiphany when the user invokes form autofill from the context menu on…
    CVE-2026-18487 (CVSS 5.4) — A flaw was found in Epiphany. An issue in how the browser reads web addresses allows attackers to fake the dom…
    CVE-2023-26081 (CVSS 7.5) — In Epiphany (aka GNOME Web) through 43.0, untrusted web content can trick users into exfiltrating passwords, b…
    CVE-2022-29536 (CVSS 7.5) — In GNOME Epiphany before 41.4 and 42.x before 42.2, an HTML document can trigger a client buffer overflow (in …
    CVE-2021-45086 (CVSS 6.1) — XSS can occur in GNOME Web (aka Epiphany) before 40.4 and 41.x before 41.1 because a server's suggested_filena…
    CVE-2021-45087 (CVSS 6.1) — XSS can occur in GNOME Web (aka Epiphany) before 40.4 and 41.x before 41.1 when View Source mode or Reader mod…
    CVE-2021-45088 (CVSS 6.1) — XSS can occur in GNOME Web (aka Epiphany) before 40.4 and 41.x before 41.1 via an error page.…
    CVE-2021-45085 (CVSS 6.1) — XSS can occur in GNOME Web (aka Epiphany) before 40.4 and 41.x before 41.1 via an about: page, as demonstrated…
    CVE-2019-6251 (CVSS 8.1) — WebKitGTK and WPE WebKit prior to version 2.24.1 are vulnerable to address bar spoofing upon certain JavaScrip…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High