Same-origin policy bypass in the Networking: HTTP component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Mozilla Firefox affected
Version Status Constraints
140.11 unaffected ≤ 140.*
151 unaffected ≤ *

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Project Subscriptions

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Advisories

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://bugzilla.mozilla.org/show_bug.cgi?id=1965430 cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-46/ cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-48/ cve-icon
History

Tue, 19 May 2026 13:45:00 +0000

Type Values Removed Values Added
Description Same-origin policy bypass in the Networking: HTTP component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.
Title Same-origin policy bypass in the Networking: HTTP component
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2026-05-19T12:29:42.239Z

Reserved: 2026-05-19T12:29:41.562Z

Link: CVE-2026-8950

cve-icon Vulnrichment

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cve-icon NVD

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cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses

No weakness.