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CVE-2026-100379: Cross-request disclosure of CentralAuth cookies in Wikipedia Android App

• Severity: medium (CVSS 5.3 v4.0)
• 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: 2026-09-25 · updated 2026-09-28
• Weakness: CWE-200

Description

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation Wikipedia Android App allows Accessing/Intercepting/Modifying HTTP Cookies. This issue affects Wikipedia Android App: main.

Affected products

• Wikimedia Foundation Wikipedia Android App: main

References

• https://github.com/wikimedia/apps-android-wikipedia/pull/6768
• https://phabricator.wikimedia.org/T433832

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