CVE-2026-18487
MEDIUMDescription
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:80@attacker.com/), 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.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Exploit Intelligence
Low risk: more likely to be exploited than 24% of all known CVEs.
References
Related Vulnerabilities
Other CWE-451 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2024-38112 | High | 7.5 | 84% | KEV | Fix |
| CVE-2025-9491 | High | 7.8 | 69% | - | - |
| CVE-2024-43461 | High | 8.8 | 54% | KEV | Fix |
| CVE-2024-38197 | Medium | 6.5 | 16% | - | - |
| CVE-2026-0907 | Critical | 9.8 | 8.0% | - | Fix |
| CVE-2026-21527 | High | 6.5 | 8.0% | - | Fix |
Common questions
How do I fix CVE-2026-18487?
Upgrade epiphany-browser on debian unstable to 51~rc-1 or later.
Is CVE-2026-18487 being actively exploited?
Not that we know of. CVE-2026-18487 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.31% is the estimated probability that it will be exploited in the next 30 days. That is higher than 24% of all scored CVEs.
How severe is CVE-2026-18487?
CVE-2026-18487 has a CVSS v3 base score of 5.4, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2026-18487 affect?
Published advisories record a fix for epiphany-browser (Debian). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
Embed a live status badge for CVE-2026-18487
Markdown
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-08-28.