What’s Vulnerable › Vulnerabilities

CVE-2026-0888: Information disclosure in the XML component

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-01-13 · updated 2026-06-17
• Weakness: CWE-200

Description

Information disclosure in the XML component. This vulnerability was fixed in Firefox 147 and Thunderbird 147.

Affected products

• Mozilla Firefox: before 147.0 — fixed in 147.0
• Mozilla Thunderbird: before 147.0 — fixed in 147.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 147.0; Mozilla Thunderbird 147.0. Check the vendor advisory for mitigations.

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=1985996
• https://www.mozilla.org/security/advisories/mfsa2026-01/
• https://www.mozilla.org/security/advisories/mfsa2026-04/

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