CVE-2018-11646

Exp

webkitFaviconDatabaseSetIconForPageURL and webkitFaviconDatabaseSetIconURLForPageURL in UIProcess/API/glib/WebKitFaviconDatabase.cpp in WebKit, as used in WebKitGTK+ through 2.21.3, mishandle an unset pageURL, leading to an application crash.

Published: 2018-06-01 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-11646 is rated High Exploit Risk (83.5/100): CVSS High severity, with high exploitation likelihood (EPSS 75.35%, 99th percentile). 5 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +3.89% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2018-11646

EDB-ID Source Kind Published Link
44876 exploit_db edb 2018-06-11 Exploit-DB ↗
44842 exploit_db edb 2018-06-05 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2018-11646

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-21 71.45% 75.35% +3.89%
2 2025-11-18 75.35% 71.45% -3.89%
3 2025-05-02 — 75.35% —

Full EPSS history (29 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-11646

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2018-11646

OS Trackers for CVE-2018-11646

vendor priority summary link
debian unimportant CVE-2018-11646 unimportant priority: Debian including 1 source packages (webkit2gtk), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2018-11646
gentoo normal CVE-2018-11646: 1 GLSA(s) (201808-04), 1 atom(s) (net-libs/webkit-gtk); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2018-11646
suse medium CVE-2018-11646 severity moderate: SUSE including 187 source package names (WebKit2GTK-4.1-lang-2.36.0-150400.2.13, WebKit2GTK-5.0-lang-2.36.0-150400.2.12, …), 261 product×package rows across 41 product lines (SUSE Linux Enterprise Desktop 12 SP3, SUSE Linux Enterprise Desktop 12 SP4, … (41 product lines)): Fixed 251, Known Not Affected 10. https://www.suse.com/security/cve/CVE-2018-11646/
ubuntu medium CVE-2018-11646 medium priority: Ubuntu including 5 source packages (qtwebkit, qtwebkit-opensource-src, qtwebkit-source, webkit2gtk, webkitgtk), 83 status rows across 17 suites (artful, bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, trusty, upstream, xenial): DNE 38, ignored 26, not-affected 13, needs-triage 3, released 3. https://ubuntu.com/security/CVE-2018-11646

Affected software / configurations for CVE-2018-11646

Vendor Product Version Raw CPE
webkitgtk webkitgtk\+ <= 2.21.3 cpe:2.3:a:webkitgtk:webkitgtk\+:*:*:*:*:*:*:*:*

References for CVE-2018-11646

URL Tags
https://bugs.webkit.org/show_bug.cgi?id=186164 Issue Tracking Patch Vendor Advisory
https://bugzilla.gnome.org/show_bug.cgi?id=795740 Exploit Issue Tracking Third Party Advisory
https://security.gentoo.org/glsa/201808-04 Third Party Advisory
https://www.exploit-db.com/exploits/44842/ Exploit Third Party Advisory VDB Entry
https://www.exploit-db.com/exploits/44876/ Exploit Third Party Advisory VDB Entry
cvelogic Threat Intelligence