What’s Vulnerable › Vulnerabilities

CVE-2026-100242: DataTransfer depends on phpspreadsheet version vulnerable to CVE-2026-59933 (XLS/OLE memory exhaustion)

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-29 · updated 2026-10-01
• Weakness: CWE-400

Description

Dependency on Vulnerable Third-Party Component and Uncontrolled Resource Consumption vulnerability in Wikimedia Foundation Mediawiki - DataTransfer Extension allows Excessive Allocation. This issue affects Mediawiki - DataTransfer Extension: from 1.46.0 before 1.47.0.

Affected products

• Wikimedia Foundation Mediawiki - DataTransfer Extension: from 1.46.0 before 1.47.0 — fixed in 1.47.0

How to fix

Upgrade to a fixed version: Wikimedia Foundation Mediawiki - DataTransfer Extension 1.47.0. Check the vendor advisory for mitigations.

References

• https://gerrit.wikimedia.org/r/q/Ibc4a9070c2425b690bc767a882e4c35046a39be7
• https://github.com/advisories/GHSA-xh5m-36r6-47m3
• https://phabricator.wikimedia.org/T433275
• https://github.com/advisories/GHSA-xh5m-36r6-47m3

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