Is there a public exploit for CVE-2026-115683?

No public exploit for CVE-2026-115683 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-115683?

CVE-2026-115683 scores CVSS 6.8 (v3.1), rated medium. EPSS puts the chance of exploitation in the next 30 days at 0.22%.

What does CVE-2026-115683 affect?

CVE-2026-115683 affects Gnome Epiphany.

6.8 Medium

A race condition in Epiphany allows a malicious website to bypass the TLS/SSL certificate warning page.

CVE-2026-115683

A race condition in Epiphany allows a malicious website to bypass the TLS/SSL certificate warning page. Epiphany registers the main-world script message handler "tlsErrorPage" so its internal TLS error page can implement "Accept Risk and Proceed". The handler was registered immediately before loading the error page, leaving a brief window where the previously loaded untrusted origin could still call window.webkit.messageHandlers.tlsErrorPage.postMessage(...). The only authorization check compares a numeric WebKit page id that increments predictably; an attacker can burst-guess ids and approve a certificate exception with no user click. If a victim visits malicious site A that redirects to site B with an invalid certificate, site A can, for a few milliseconds, disable TLS certificate error warnings for host B until Epiphany is restarted, enabling man-in-the-middle or site spoofing for that host. Upstream report: https://gitlab.gnome.org/GNOME/epiphany/-/workitems/2978 Proof of concept: https://beford.net/poc/sslpoc.html Fix: https://gitlab.gnome.org/GNOME/epiphany/-/mergerequests/2245 (register handlers on LOADCOMMITTED). No fixed release tagged yet; reporter and maintainer…

Assessment

CVSS: 6.8 (v3.1)
Severity: Medium
EPSS: 0.22% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 30 October 2026
Last updated: 2 November 2026
Affected: Gnome · Epiphany
Assigner: fedora

CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

At the source

EUVD (ENISA)

References

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