CVE-2026-0888 — Sensitive Information Exposure in Mozilla Firefox

CWE-200 — Sensitive Information Exposure9 documents8 sources
Severity
5.3MEDIUMNVD
EPSS
0.0%
top 97.53%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Mozilla FirefoxMozilla Thunderbird
Timeline
PublishedJan 13

Description

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

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:NExploitability: 3.9 | Impact: 1.4

Affected Packages2 packages

▶NVDmozilla/firefox< 147.0
▶NVDmozilla/thunderbird< 147.0

🔴Vulnerability Details

3
CVEList
Information disclosure in the XML component↗2026-01-13
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OSV
CVE-2026-0888: Information disclosure in the XML component↗2026-01-13
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GHSA
GHSA-94r2-4g95-pg9m: Information disclosure in the XML component↗2026-01-13
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📋Vendor Advisories

4
Red Hat
firefox: Information disclosure in the XML component↗2026-01-13
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Debian
CVE-2026-0888: firefox - Information disclosure in the XML component. This vulnerability affects Firefox ...↗2026
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Mozilla
Mozilla Foundation Security Advisory 2026-01: CVE-2026-0888↗
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Mozilla
Mozilla Foundation Security Advisory 2026-04: CVE-2026-0888↗
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🕵️Threat Intelligence

1
Wiz
CVE-2026-0888 Impact, Exploitability, and Mitigation Steps | Wiz↗
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CVE-2026-0888 — Sensitive Information Exposure | cvebase