CVE-2026-115683

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{"affected": [{"affectedData": [{"collectionURL": "https://gitlab.gnome.org/GNOME/epiphany", "defaultStatus": "affected", "packageName": "epiphany", "product": "Epiphany", "vendor": "GNOME", "versions": [{"lessThan": "51.1", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "patrick@puiterwijk.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A race condition in Epiphany allows a malicious website to bypass the TLS/SSL certificate warning page.\n\nEpiphany 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.\n\nIf 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.\n\nUpstream report: https://gitlab.gnome.org/GNOME/epiphany/-/work_items/2978\nProof of concept: https://beford.net/poc/ssl_poc.html\nFix: https://gitlab.gnome.org/GNOME/epiphany/-/merge_requests/2245 (register handlers on LOAD_COMMITTED). No fixed release tagged yet; reporter and maintainer describe all current versions as affected. Maintainer notes the risky registration timing dates to commit 1da1caed (Epiphany 45.x era); before that the handlers were always registered and similarly reachable from web content."}], "id": "CVE-2026-115683", "lastModified": "2026-11-02T10:17:10.910", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 1.6, "impactScore": 5.2, "source": "patrick@puiterwijk.org", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-115683", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-30T14:07:43.922960Z", "version": "2.0.3"}}]}, "published": "2026-10-30T14:16:39.373", "references": [{"source": "patrick@puiterwijk.org", "url": "https://access.redhat.com/security/cve/CVE-2026-115683"}, {"source": "patrick@puiterwijk.org", "url": "https://beford.net/poc/ssl_poc.html"}, {"source": "patrick@puiterwijk.org", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2560012"}, {"source": "patrick@puiterwijk.org", "url": "https://gitlab.gnome.org/GNOME/epiphany/-/merge_requests/2245"}, {"source": "patrick@puiterwijk.org", "url": "https://gitlab.gnome.org/GNOME/epiphany/-/work_items/2978"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://gitlab.gnome.org/GNOME/epiphany/-/work_items/2978"}], "sourceIdentifier": "patrick@puiterwijk.org", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-367"}], "source": "patrick@puiterwijk.org", "type": "Secondary"}]}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 80.0, "confidence_source": "inferred", "scores": [{"score": 80.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "product": "epiphany", "vendor": "gnome"}], "created": "2026-10-24T01:30:17.856576+00:00", "updated": "2026-10-30T14:45:14.954635+00:00", "vendors": ["gnome", "gnome$PRODUCT$epiphany"]}