Security readout for executives and security teams
Plain-English summary
This CVE describes a remote crash issue in GNOME Web, also called Epiphany. A malicious web page could crash the browser, causing denial of service for the user. The sources do not indicate data theft, code execution, or confirmed active exploitation.
Executive priority
Treat this as low urgency unless GNOME Web is deployed broadly or used for critical workflows. It is disruptive rather than system-compromising based on available evidence, but legacy desktop software should still be retired or updated.
Technical view
libephymain.so in GNOME Web/Epiphany through 3.28.2.1 can crash when processing certain window.open and document.write calls. The documented impact is application-level denial of service. No CVSS score, CWE, patch version, or vendor mitigation is provided in the source bundle.
Likely exposure
Exposure is likely limited to systems where users still run GNOME Web/Epiphany version 3.28.2.1 or earlier, especially for general web browsing. Server-side exposure is not indicated by the sources.
Exploitation context
The CVE record describes remote attackers causing a browser crash through crafted web content. CISA KEV status is false in the bundle, and no cited source confirms active exploitation in the wild.
Researcher notes
The public record is sparse: affected scope is described, but structured product data, CVSS, CWE, exploit status, and fixed-version details are missing. Analysis should avoid assuming broader WebKit, GNOME, or Linux distribution impact without vendor confirmation.
Mitigation direction
- Inventory GNOME Web/Epiphany versions across Linux desktop fleets.
- Check GNOME and distribution advisories for fixed packages or guidance.
- Update GNOME Web/Epiphany through trusted OS package channels when available.
- Avoid using affected versions for untrusted browsing.
- Replace or remove legacy Epiphany installs if not business-required.
Validation and detection
- Confirm whether installed Epiphany versions are 3.28.2.1 or earlier.
- Review package changelogs or advisories for CVE-2018-12016 coverage.
- Check endpoint telemetry for recurring Epiphany crash patterns.
- Verify user-facing browser standards do not rely on affected versions.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2018-12016 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/ldpreload/Disclosure/blob/master/EpiphanyDoS.txtCVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.