How severe is CVE-2026-58519?

CVE-2026-58519 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-58519 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-58519?

CVE-2026-58519 affects Mediawiki Cargo. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-58519?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2026-58519 published?

CVE-2026-58519 was published on 2026-07-01 and last updated on 2026-07-06.

CVE-2026-58519

CVE-2026-58519 is a medium-severity vulnerability in Mediawiki Cargo with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v4: 6.9
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Mediawiki Cargo
Published: 2026-07-01
Last modified: 2026-07-06

Description

Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in The Wikimedia Foundation Mediawiki - Cargo Extension allows Stored XSS. This issue affects Mediawiki - Cargo Extension: from * before 3.9.1.

Frequently asked questions

What is CVE-2026-58519?: Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in The Wikimedia Foundation Mediawiki - Cargo Extension allows Stored XSS. This issue affects Mediawiki - Cargo Extension: from * before 3.9.1.
How severe is CVE-2026-58519?: CVE-2026-58519 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-58519 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-58519?: CVE-2026-58519 affects Mediawiki Cargo. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-58519?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-58519 published?: CVE-2026-58519 was published on 2026-07-01 and last updated on 2026-07-06.

References

Affected products (1)

cpe:2.3:a:mediawiki:cargo:*:*:*:*:*:mediawiki:*:*

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