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vulnerabilityCVE-2026-4786
Name
CVE-2026-4786
Source
NVD ( link)Debian ( link)
Description
Mitgation of CVE-2026-4519 was incomplete. If the URL contained "%action" the mitigation could be bypassed for certain browser types the "webbrowser.open()" API could have commands injected into the underlying shell. See CVE-2026-4519 for details.
Published Date
Updated Date
Workaround
-
Advisories

Analysis#


Affected Component
Analysis
python3
Exploitable

Vulnerability Ratings#


7
CVSSv4
7.1
CVSSv31
NaN
other

Others affected components#


Name
Project
Project Version
Version
Status
buildroot
master
3.14.7
Not Affected
openwrt
master
3.14.5-r2
Exploitable
openwrt
openwrt-25.12
3.13.9-r3
Exploitable
yocto
kirkstone
3.10.20
Exploitable
yocto
master
3.14.7
Not Affected
yocto
scarthgap
3.12.13
Patched

Resolved with patches#


python3 (yocto:scarthgap)

#
Title
Author
Resolve
1
[3.11] gh-148169: Fix webbrowser `%action` substitution
Stan Ulbrych <stan@python.org>
CVE-2026-4519
CVE-2026-4786