CVE-2025-3839
Epiphany: insecure external protocol invocation in epiphany
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
8.0
Epiphany: insecure external protocol invocation in epiphany
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.
- Record
CVE-2025-3839- CVSS 3.1
- 8.0 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N - Weakness
- CWE-356
- Updated
- 2026-11-02
EUVDEUVD-2026-4436
8.0
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.
- Record
EUVD-2026-4436- CVSS 3.1
- 8.0 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-h95f-v923-pcr4
8.0
A flaw was found in Epiphany, a tool that allows websites to open external URL handler...
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.
- Record
GHSA-h95f-v923-pcr4- CVSS 3.1
- 8.0 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N - Weakness
- CWE-356
- Updated
- 2026-11-02
NVD
8.0
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.
- Record
CVE-2025-3839- CVSS 3.1
- 8.0 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N - Weakness
- CWE-356
- Updated
- 2026-11-02
OSV
8.0
Epiphany: insecure external protocol invocation in epiphany
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.
- Record
CVE-2025-3839- CVSS 3.1
- 8.0 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N - Weakness
- CWE-356
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2025-3839
8.0
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.
- Record
DEBIAN-CVE-2025-3839- CVSS 3.1
- 8.0 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N - Updated
- 2026-11-02
OSVUBUNTU-CVE-2025-3839
8.0
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.
- Record
UBUNTU-CVE-2025-3839- CVSS 3.1
- 8.0 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N - Updated
- 2026-11-02
OSVopenSUSE-SU-2025:15011-1 No score
epiphany-48.1-1.1 on GA media
These are all security issues fixed in the epiphany-48.1-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2025:15011-1- Updated
- 2026-11-02
Affected packages
| Package | Affected | Fixed |
|---|---|---|
epiphany-browserDebian:12 |
All versions, plus listed versions 43.1-144.0-144.1-144.2-144.3-1 Show 40 moreShow less44.5-144.5-244.6-144~rc-145.0-145.1-145.2-145~beta-146.0-146.0-246.1-146.2-146.3-146~alpha-146~beta-147.0-147.2-147~beta-147~rc-148.0-148.1-148.2-148.3-148.3-248.5-148.5-248.5-348~beta-148~rc-148~rc-249.0-149.1-149.2-149.2-249.2-350.3-150.3-250.4-150.4-251~rc-1 |
None known |
epiphany-browserDebian:13 |
before 48.1-1 | 48.1-1 |
epiphany-browserDebian:14 |
before 48.1-1 | 48.1-1 |
epiphany-browserUbuntu:16.04:LTS |
All versions, plus listed versions 3.16.3-1ubuntu13.18.0-1ubuntu23.18.1-1ubuntu13.18.3-0ubuntu13.18.5-0ubuntu13.18.5-0ubuntu1.13.18.10-0ubuntu13.18.11-0ubuntu1 |
None known |
epiphany-browserUbuntu:18.04:LTS |
All versions, plus listed versions 3.26.1-1ubuntu13.26.1-1ubuntu23.26.1-1ubuntu43.26.5.1-1ubuntu13.27.90-1ubuntu1 Show 4 moreShow less3.28.0.1-1ubuntu13.28.1-1ubuntu13.28.5-0ubuntu13.28.6-0ubuntu1 |
None known |
epiphany-browserUbuntu:20.04:LTS |
All versions, plus listed versions 3.34.1-13.34.1-1build13.36.0-13.36.1-13.36.2-0ubuntu13.36.3-0ubuntu13.36.4-0ubuntu13.36.4-0ubuntu2 |
None known |
epiphany-browserUbuntu:22.04:LTS |
All versions, plus listed versions 41.0-141.0-241.2-141.3-142~beta-1 Show 4 moreShow less42.0-142.1-142.1-1ubuntu142.4-0ubuntu1 |
None known |
epiphany-browserUbuntu:24.04:LTS |
All versions, plus listed versions 45.0-145.1-146~alpha-146~beta-146.0-146.0-2build146.5-0ubuntu1 |
None known |
epiphany-browserUbuntu:25.10 |
All versions, plus listed versions 48.0-148.3-148.3-248.3-2build148.5-148.5-3 |
None known |
epiphanyopenSUSE:Tumbleweed |
before 48.1-1.1 | 48.1-1.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-3839 is a high vulnerability (CVSS 8.0) in epiphany, published April 22, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.39%, the 33rd percentile. Fixed in epiphany-browser 48.1-1.