CVE-2025-66286
Webkitgtk: authorization bypass through webpage::send-request signal handler
An API design flaw in WebKitGTK and WPE WebKit allows untrusted web content to unexpectedly perform IP connections, DNS lookups, and HTTP requests. Applications expect to use the WebPage::send-request signal handler to approve or reject all network requests. However, certain types of HTTP requests bypass this signal handler.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Webkitgtk: authorization bypass through webpage::send-request signal handler
An API design flaw in WebKitGTK and WPE WebKit allows untrusted web content to unexpectedly perform IP connections, DNS lookups, and HTTP requests. Applications expect to use the WebPage::send-request signal handler to approve or reject all network requests. However, certain types of HTTP requests bypass this signal handler.
- Record
CVE-2025-66286- CVSS 3.1
- 4.7 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N - Weakness
- CWE-639
- Updated
- 2026-11-05
EUVDEUVD-2025-209565
An API design flaw in WebKitGTK and WPE WebKit allows untrusted web content to unexpectedly perform IP connections, DNS lookups, and HTTP requests. Applications expect to use the WebPage::send-request signal handler to approve or reject all network requests. However, certain types of HTTP requests bypass this signal handler.
- Record
EUVD-2025-209565- CVSS 3.1
- 4.7 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N - Updated
- 2026-11-05
GitHub AdvisoriesGHSA-qx86-g93j-m25r
An API design flaw in WebKitGTK and WPE WebKit allows untrusted web content to unexpectedly...
An API design flaw in WebKitGTK and WPE WebKit allows untrusted web content to unexpectedly perform IP connections, DNS lookups, and HTTP requests. Applications expect to use the WebPage::send-request signal handler to approve or reject all network requests. However, certain types of HTTP requests bypass this signal handler.
- Record
GHSA-qx86-g93j-m25r- CVSS 3.1
- 4.7 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N - Weakness
- CWE-639
- Updated
- 2026-11-02
NVD
An API design flaw in WebKitGTK and WPE WebKit allows untrusted web content to unexpectedly perform IP connections, DNS lookups, and HTTP requests. Applications expect to use the WebPage::send-request signal handler to approve or reject all network requests. However, certain types of HTTP requests bypass this signal handler.
- Record
CVE-2025-66286- CVSS 3.1
- 4.7 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N - Weakness
- CWE-639
- Updated
- 2026-11-05
OSVUBUNTU-CVE-2025-66286
An API design flaw in WebKitGTK and WPE WebKit allows untrusted web content to unexpectedly perform IP connections, DNS lookups, and HTTP requests. Applications expect to use the WebPage::send-request signal handler to approve or reject all network requests. However, certain types of HTTP requests bypass this signal handler.
- Record
UBUNTU-CVE-2025-66286- CVSS 3.1
- 4.7 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
qtwebkit-opensource-srcUbuntu:16.04:LTS |
All versions, plus listed versions 5.4.2+dfsg-1ubuntu2.15.5.1+dfsg-2ubuntu1 |
None known |
webkit2gtkUbuntu:16.04:LTS |
All versions, plus listed versions 2.8.5+dfsg1-32.10.3+dfsg1-12.10.4+dfsg1-12.10.5-12.10.6-1 Show 21 moreShow less2.10.6-1ubuntu12.10.8-1ubuntu12.10.9-1ubuntu12.12.5-0ubuntu0.16.04.12.14.2-0ubuntu0.16.04.12.14.3-0ubuntu0.16.04.12.14.5-0ubuntu0.16.04.12.16.1-0ubuntu0.16.04.12.16.1-0ubuntu0.16.04.22.16.2-0ubuntu0.16.04.12.16.3-0ubuntu0.16.04.12.16.6-0ubuntu0.16.04.12.18.0-0ubuntu0.16.04.22.18.3-0ubuntu0.16.04.12.18.4-0ubuntu0.16.04.12.18.5-0ubuntu0.16.04.12.18.6-0ubuntu0.16.04.12.20.1-0ubuntu0.16.04.12.20.2-0ubuntu0.16.04.12.20.3-0ubuntu0.16.04.12.20.5-0ubuntu0.16.04.1 |
None known |
qtwebkit-sourceUbuntu:16.04:LTS |
All versions, plus listed versions 2.3.2-0ubuntu102.3.2-0ubuntu11 |
None known |
webkitgtkUbuntu:16.04:LTS |
All versions, plus listed versions 2.4.9-2ubuntu22.4.10-0ubuntu12.4.11-0ubuntu0.1 |
None known |
webkit2gtkUbuntu:18.04:LTS |
All versions, plus listed versions 2.18.0-22.18.0-2build12.18.2-12.18.3-12.18.4-1 Show 33 moreShow less2.18.6-12.19.91-1ubuntu12.19.92-12.20.0-12.20.0-22.20.0-2ubuntu12.20.1-12.20.2-0ubuntu0.18.04.12.20.3-0ubuntu0.18.04.12.20.5-0ubuntu0.18.04.12.22.2-0ubuntu0.18.04.12.22.2-0ubuntu0.18.04.22.22.4-0ubuntu0.18.04.12.22.5-0ubuntu0.18.04.12.22.6-0ubuntu0.18.04.12.24.1-0ubuntu0.18.04.12.24.2-0ubuntu0.18.04.12.24.4-0ubuntu0.18.04.12.26.1-0ubuntu0.18.04.12.26.2-0ubuntu0.18.04.12.26.3-0ubuntu0.18.04.12.26.4-0ubuntu0.18.04.12.28.0-0ubuntu0.18.04.32.28.1-0ubuntu0.18.04.12.28.2-0ubuntu0.18.04.12.28.3-0ubuntu0.18.04.12.28.4-0ubuntu0.18.04.12.30.3-0ubuntu0.18.04.12.30.5-0ubuntu0.18.04.12.30.6-0ubuntu0.18.04.12.32.0-0ubuntu0.18.04.12.32.3-0ubuntu0.18.04.12.32.4-0ubuntu0.18.04.1 |
None known |
qtwebkit-opensource-srcUbuntu:18.04:LTS |
All versions, plus listed versions 5.9.1+dfsg-5ubuntu15.9.1+dfsg-5ubuntu35.212.0~alpha2-5build25.212.0~alpha2-5build45.212.0~alpha2-75.212.0~alpha2-7build25.212.0~alpha2-7ubuntu1 |
None known |
qtwebkit-sourceUbuntu:18.04:LTS |
All versions, plus listed versions 2.3.2-0ubuntu13 |
None known |
webkitgtkUbuntu:18.04:LTS |
All versions, plus listed versions 2.4.11-32.4.11-3ubuntu22.4.11-3ubuntu3 |
None known |
webkit2gtkUbuntu:20.04:LTS |
All versions, plus listed versions 2.26.1-32.26.2-12.26.3-1ubuntu22.26.4-1ubuntu12.28.0-1ubuntu2 Show 26 moreShow less2.28.1-12.28.2-0ubuntu0.20.04.12.28.3-0ubuntu0.20.04.12.28.4-0ubuntu0.20.04.12.30.3-0ubuntu0.20.04.12.30.5-0ubuntu0.20.04.12.30.6-0ubuntu0.20.04.12.32.0-0ubuntu0.20.04.12.32.3-0ubuntu0.20.04.12.32.4-0ubuntu0.20.04.12.34.1-0ubuntu0.20.04.12.34.3-0ubuntu0.20.04.12.34.4-0ubuntu0.20.04.12.34.6-0ubuntu0.20.04.12.36.0-0ubuntu0.20.04.32.36.2-0ubuntu0.20.04.12.36.3-0ubuntu0.20.04.12.36.4-0ubuntu0.20.04.12.36.6-0ubuntu0.20.04.12.36.7-0ubuntu0.20.04.12.36.8-0ubuntu0.20.04.12.38.2-0ubuntu0.20.04.12.38.3-0ubuntu0.20.04.12.38.4-0ubuntu0.20.04.22.38.5-0ubuntu0.20.04.12.38.6-0ubuntu0.20.04.1 |
None known |
qtwebkit-opensource-srcUbuntu:20.04:LTS |
All versions, plus listed versions 5.212.0~alpha3-35.212.0~alpha3-55.212.0~alpha3-65.212.0~alpha3-75.212.0~alpha4-15.212.0~alpha4-1ubuntu15.212.0~alpha4-1ubuntu25.212.0~alpha4-1ubuntu2.1 |
None known |
Show 8 moreShow less
| Package | Affected | Fixed |
|---|---|---|
wpewebkitUbuntu:20.04:LTS |
All versions, plus listed versions 2.26.3-12.26.4-12.26.4-1build12.28.0-12.28.1-1 |
None known |
qtwebkit-opensource-srcUbuntu:22.04:LTS |
All versions, plus listed versions 5.212.0~alpha4-125.212.0~alpha4-135.212.0~alpha4-145.212.0~alpha4-14build15.212.0~alpha4-14ubuntu25.212.0~alpha4-15ubuntu1 |
None known |
webkit2gtkUbuntu:22.04:LTS |
All versions, plus listed versions 2.34.0-1ubuntu12.34.1-1ubuntu12.34.2-1ubuntu12.34.3-12.35.3-1ubuntu1 Show 37 moreShow less2.35.90-1ubuntu12.36.0-2ubuntu12.36.2-0ubuntu0.22.04.12.36.3-0ubuntu0.22.04.12.36.4-0ubuntu0.22.04.12.36.6-0ubuntu0.22.04.12.36.7-0ubuntu0.22.04.12.36.8-0ubuntu0.22.04.12.38.2-0ubuntu0.22.04.22.38.3-0ubuntu0.22.04.12.38.4-0ubuntu0.22.04.12.38.5-0ubuntu0.22.04.12.38.6-0ubuntu0.22.04.12.40.4-0ubuntu0.22.04.12.40.5-0ubuntu0.22.04.12.42.1-0ubuntu0.22.04.12.42.2-0ubuntu0.22.04.12.42.3-0ubuntu0.22.04.12.42.4-0ubuntu0.22.04.12.42.5-0ubuntu0.22.04.22.44.0-0ubuntu0.22.04.12.44.2-0ubuntu0.22.04.12.44.3-0ubuntu0.22.04.12.46.1-0ubuntu0.22.04.32.46.3-0ubuntu0.22.04.12.46.4-0ubuntu0.22.04.12.46.5-0ubuntu0.22.04.12.46.6-0ubuntu0.22.04.12.48.0-0ubuntu0.22.04.12.48.1-0ubuntu0.22.04.12.48.3-0ubuntu0.22.04.12.48.5-0ubuntu0.22.04.12.48.7-0ubuntu0.22.04.22.50.1-0ubuntu0.22.04.12.50.2-0ubuntu0.22.04.22.50.3-0ubuntu0.22.04.12.50.4-0ubuntu0.22.04.1 |
None known |
wpewebkitUbuntu:22.04:LTS |
All versions, plus listed versions 2.32.4-12.34.1-12.34.2-12.34.3-12.34.4-1 Show 4 moreShow less2.34.5-12.34.6-12.36.0-2ubuntu22.36.0-2ubuntu3 |
None known |
qtwebkit-opensource-srcUbuntu:24.04:LTS |
All versions, plus listed versions 5.212.0~alpha4-335.212.0~alpha4-33build15.212.0~alpha4-345.212.0~alpha4-34ubuntu35.212.0~alpha4-34ubuntu45.212.0~alpha4-36 |
None known |
webkit2gtkUbuntu:24.04:LTS |
All versions, plus listed versions 2.42.1-22.42.2-12.42.3-12.42.4-12.43.3-1 Show 21 moreShow less2.43.3-1build22.44.0-22.44.2-0ubuntu0.24.04.12.44.2-0ubuntu0.24.04.22.44.3-0ubuntu0.24.04.12.46.1-0ubuntu0.24.04.12.46.3-0ubuntu0.24.04.12.46.4-0ubuntu0.24.04.12.46.5-0ubuntu0.24.04.12.46.6-0ubuntu0.24.04.12.48.0-0ubuntu0.24.04.12.48.1-0ubuntu0.24.04.12.48.3-0ubuntu0.24.04.12.48.5-0ubuntu0.24.04.12.48.7-0ubuntu0.24.04.22.50.1-0ubuntu0.24.04.12.50.2-0ubuntu0.24.04.22.50.3-0ubuntu0.24.04.12.50.4-0ubuntu0.24.04.12.52.3-0ubuntu0.24.04.12.52.6-0ubuntu0.24.04.1 |
None known |
webkit2gtkUbuntu:26.10 |
All versions, plus listed versions 2.52.0-12.52.3-22.52.4-12.52.4-1ubuntu12.52.6-1ubuntu1 |
None known |
webkit2gtkUbuntu:26.04:LTS |
All versions, plus listed versions 2.48.6-1ubuntu22.50.0-2ubuntu12.50.1-1ubuntu12.50.2-1ubuntu12.50.3-1ubuntu1 Show 7 moreShow less2.50.4-1ubuntu12.51.91-12.51.92-12.52.0-12.52.3-0ubuntu0.26.04.22.52.3-0ubuntu0.26.04.32.52.6-0ubuntu0.26.04.1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | CVE List | |
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-66286 is a medium vulnerability (CVSS 4.7) in Red Hat Enterprise Linux 6, published April 23, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.23%, the 14th percentile. No source names a fixed version.