The UIProcess subsystem in WebKit, as used in WebKitGTK through 2.23.90 and WebKitGTK+ through 2.22.6 and other products, does not prevent t
The UIProcess subsystem in WebKit, as used in WebKitGTK through 2.23.90 and WebKitGTK+ through 2.22.6 and other products, does not prevent the script dialog size from exceeding the web view size, which allows remote attackers to cause a denial of service (Buffer Overflow) or possibly have unspecified other impact, related to UIProcess/API/gtk/WebKitScriptDialogGtk.cpp, UIProcess/API/gtk/WebKitScriptDialogImpl.cpp, and UIProcess/API/gtk/WebKitWebViewGtk.cpp, as demonstrated by GNOME Web (aka Epiphany).
- Published
- Feb 24, 2019
- Updated
- Jun 16, 2026
- EPSS
- 16.1% · 97th percentile
- CWE
- CWE-119
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Report tools
Action score
44
Plan
Add it to your regular patch cycle.
- CVSS
- 39 / 40 · 9.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 5 / 30 · 16.1%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| webkitgtk | webkitgtk | cpe:2.3:a:webkitgtk:webkitgtk |
| webkitgtk | webkitgtk\+ | cpe:2.3:a:webkitgtk:webkitgtk\+ |
| opensuse | leap | cpe:2.3:o:opensuse:leap |
| canonical | ubuntu linux | cpe:2.3:o:canonical:ubuntu_linux |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- canonical ubuntu linux18.04
- canonical ubuntu linux18.10
- opensuse leap15.0
- opensuse leap42.3
- webkitgtk webkitgtkup to 2.23.90 inclusive
- webkitgtk webkitgtk+up to 2.22.6 inclusive
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | webkit2gtk | before 2.24.1-1 | 2.24.1-1 |
| openSUSE:Leap 15.0 | webkit2gtk3 | before 2.24.0-lp150.2.16.1 | 2.24.0-lp150.2.16.1 |
| SUSE:Linux Enterprise Desktop 12 SP3 | webkit2gtk3 | before 2.24.0-2.38.2 | 2.24.0-2.38.2 |
| SUSE:Linux Enterprise Module for Basesystem 15 | webkit2gtk3 | before 2.24.0-3.21.1 | 2.24.0-3.21.1 |
Same product
webkitgtk: all recordsOther highest-scoring records for the same primary product.
- CVE-2019-8720A vulnerability was found in WebKit.KEV65This week
- CVE-2020-13753The bubblewrap sandbox of WebKitGTK and WPE WebKit, prior to 2.28.3, failed to properly block access to CLONE_NEWUSER and the TIOCSTI ioctl.41Plan
- CVE-2020-10018WebKitGTK through 2.26.4 and WPE WebKit through 2.26.4 (which are the versions right before 2.28.0) contains a memory corruption issue (use-40Plan
- CVE-2021-21806An exploitable use-after-free vulnerability exists in WebKitGTK browser version 2.30.3 x64.36Monitor
- CVE-2021-21779A use-after-free vulnerability exists in the way Webkit’s GraphicsContext handles certain events in WebKitGTK 2.30.4.36Monitor
- CVE-2020-13558A code execution vulnerability exists in the AudioSourceProviderGStreamer functionality of Webkit WebKitGTK 2.30.1.36Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:webkit2gtk | 2.24.1-1 · Debian:12 | Package registry (OSV) |
| opensuse:webkit2gtk3 | 2.24.0-lp150.2.16.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| suse:webkit2gtk3 | 2.24.0-3.21.1 · SUSE:Linux Enterprise Module for Basesystem 15 | Package registry (OSV) |
Exploit status
Proof of concept available
A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.
Evidence
- Exploit-DB entry ×1
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Exploit-DB entry | dos | 2019-02-28 |
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
- Published
- First PoC+4 d
- TodaySep 30, 2026+2775 d
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory BufferCVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Buffer Overflow via Environment VariablesCAPEC-10likelihood: High · High
- Overflow BuffersCAPEC-100likelihood: High · Very High
- Buffer ManipulationCAPEC-123likelihood: High · Very High
- Client-side Injection-induced Buffer OverflowCAPEC-14likelihood: Medium · High
- Filter Failure through Buffer OverflowCAPEC-24likelihood: High · High
- MIME ConversionCAPEC-42likelihood: High · High
- Overflow Binary Resource FileCAPEC-44likelihood: High · Very High
- Buffer Overflow via Symbolic LinksCAPEC-45likelihood: High · High
ATT&CK techniques
—
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
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References
- lists.opensuse.org/opensuse-security-announce/2019-04/msg00058.html
- lists.opensuse.org/opensuse-security-announce/2019-05/msg00005.html
- bugs.webkit.org/show_bug.cgi?id=184875
- github.com/WebKit/webkit/commit/6f9b511a115311b13c06eb58038ddc2c78da5531
- trac.webkit.org/changeset/241515/webkit
- usn.ubuntu.com/3948-1/
Vendor advisories and official records. Exploit/PoC links are deliberately left out.