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No exploitation reportedFix available

CVE-2025-3839

No exploitation reported by the sources we read.

  • Published2026-01-23
  • WeaknessCWE-356

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2026-01-2305:16CVE publishedNVD

Versions per branch

Products declared by the CNA1 product

As fedora, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-01-23

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • epiphanyopenSUSE:Tumbleweedall versions · fixed in 48.1-1.1
  • epiphany-browserUbuntu:25.10all versions · no fixed version listed
  • epiphany-browserUbuntu:24.04:LTSall versions · no fixed version listed
  • epiphany-browserUbuntu:22.04:LTSall versions · no fixed version listed
  • epiphany-browserUbuntu:20.04:LTSall versions · no fixed version listed
  • epiphany-browserUbuntu:18.04:LTSall versions · no fixed version listed
  • epiphany-browserUbuntu:16.04:LTSall versions · no fixed version listed
  • epiphany-browserDebian:14all versions · fixed in 48.1-1

2 more package ranges on OSV.dev

Vendor advisories

  • CVE-2025-3839 Red Hat Product Security

    epiphany: Insecure External Protocol Invocation in Epiphany

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N
Published
2026-01-23
Last Modified
2026-06-17
NVD status
Deferred
GitHub Advisory
GHSA-h95f-v923-pcr4

Frequently asked questions

What is 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.

Is CVE-2025-3839 actively exploited?

Active exploitation of CVE-2025-3839 has not been confirmed. Its EPSS score was 0.4% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2025-3839?

CVE-2025-3839 has a CVSS v3 base score of 8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N.

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