Medium severity6.1NVD Advisory· Published Apr 7, 2026· Updated Apr 15, 2026

CVE-2026-39841

Description

Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in Wikimedia Foundation Mediawiki - Cargo Extension allows Stored XSS.This issue affects Mediawiki - Cargo Extension: before 3.8.7.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

MediaWiki/Cargo
cpe:2.3:a:mediawiki:cargo:*:*:*:*:*:*:*:*
Range: <3.8.7
Wikimedia Foundation/Cargo Extensionllm-create
Range: before 3.8.7
Wikimedia Foundation/Mediawikillm-fuzzy

Patches

Vulnerability mechanics

References

gerrit.wikimedia.org/r/c/mediawiki/extensions/Cargo/+/1237973nvdPatch
phabricator.wikimedia.org/T416389nvdExploitIssue TrackingVendor Advisory

News mentions

No linked articles in our index yet.

Severity

MediumCVSS v3.1

6.1/ 10

CVSS v46.3

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack vector: Network
Complexity: Low
Privileges: None
User interaction: Required
Scope: Changed
Confidentiality: Low
Integrity: Low
Availability: None

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS

Probability of exploitation in the next 30 days.

0.16%

VYPR risk score

Composite of severity, exploitation, and reach.

0.40medium

cvss	0.397
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000

Weaknesses

CWE-79
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-80
Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

CVE ID

CVE-2026-39841

Credits

A
Alex44019
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