CVE-2026-96869

4.3 MEDIUM 0.2% exploit odds Fix listed Disclosure Browser & mail

What it is

Information disclosure in the Networking component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17.

At a glance

Exploitability: Can be exploited over the network without logging in, but needs a user to act. Limited direct impact.
Exploit odds: 0.2% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2026-09-29 13:17 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-10-05 13:52 UTC Last updatedMost recent change to the record

Details

Published: 2026-09-29 13:17 UTC
Last modified: 2026-10-05 13:52 UTC
Exploit probability: 0.2% · EPSS, next 30 days
Weakness: CWE-200 · Information exposure
Record status: Analyzed

Affected

Mozilla Firefox < 140.17.0
Mozilla Firefox < 153.4.0
Mozilla Firefox < 157.0.0
Mozilla Thunderbird < 140.17.0
Mozilla Thunderbird < 153.4.0
Mozilla Thunderbird < 157.0

Attack profile CVSS 3.1 · 4.3

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: Required
Scope: Unchanged
Confidentiality: Low
Integrity: None
Availability: None

Raw vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Download Square Reddit

Fix and advisories

References

NVD record · CVE.org record