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CVE-20XX-?

CVE-2026-8971

6.5 MEDIUM 0.2% exploit odds Fix listed Other Browser & mail

What it is

Same-origin policy bypass in the Networking: JAR component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.

At a glance

Exploitability: Can be exploited over the network without logging in. 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

2026-05-19 14:16 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-07-23 20:10 UTC Last updatedMost recent change to the record

Details

Published: 2026-05-19 14:16 UTC
Last modified: 2026-07-23 20:10 UTC
Exploit probability: 0.2% · EPSS, next 30 days
Weakness: CWE-346
Record status: Analyzed

Affected

Mozilla Firefox < 151.0.0
Mozilla Thunderbird < 151.0.0

Attack profile CVSS 3.1 · 6.5

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

Raw vector

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

Meme: I wake up, CVE-2026-8971

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Fix and advisories

References

NVD record · CVE.org record