CVE-2026-118002

Information disclosure due to race condition in the Networking component

Risk score: 55/100
CVSS: 8.1 v3.1
Exploit chance (30 days): 0.2%
Published: 27 Oct 2026

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What to know

What it is: Information disclosure due to race condition in the Networking component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
Affected: See advisory
Fix: Apply the vendor's security update; see the linked advisory.
Exploitation: No known exploitation

Why it is Yellow

CVSS 8.1 high
Remotely exploitable without logging in

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2073584
https://www.mozilla.org/security/advisories/mfsa2026-118/
https://www.mozilla.org/security/advisories/mfsa2026-120/
https://www.mozilla.org/security/advisories/mfsa2026-121/
https://www.mozilla.org/security/advisories/mfsa2026-122/

Original description

Information disclosure due to race condition in the Networking component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.

Last activity 27 Oct 2026. Patch Forecast updates every hour.