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CVE-2026-8094

Mozilla Firefox code injection

9.8 CRITICALEPSS 0.63%
  1. Published7 May 2026

Description

Other issue in the WebRTC component. This vulnerability was fixed in Firefox ESR 140.10.2 and Thunderbird 140.10.2.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Mozilla Firefox< 140.10.2
Mozilla Thunderbird< 140.10.2

Remediation

Fixed in
Mozilla Firefox≥ 140.10.2
Mozilla Thunderbird≥ 140.10.2

References

and 17 more references

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Frequently asked

Is CVE-2026-8094 being actively exploited?

CVE-2026-8094 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.63%.

How severe is CVE-2026-8094?

CVE-2026-8094 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.63% probability of exploitation.

Which products are affected by CVE-2026-8094?

Affected products include Mozilla Firefox, Mozilla Thunderbird.

How do I fix CVE-2026-8094?

Upgrade affected software to a fixed version, for example Mozilla Firefox 140.10.2, Mozilla Thunderbird 140.10.2 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-8094 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.