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CVE-2026-8971

6.5 MEDIUM

Same-origin policy bypass in the Networking: JAR component

Published: 2026-05-19 · Last updated: 2026-05-20

Severity and scoring

CVSS
6.5 MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CWE
CWE-346

Affected products

VendorProduct
mozillafirefox, thunderbird

Description

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

Source: NVD

References

Related CVEs

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  • CVE-2026-12330 — Incorrect boundary conditions in the Internationalization component (5.4 MEDIUM)
  • CVE-2026-12329 — Memory safety bug fixed in Thunderbird ESR 140.12 (5.3 MEDIUM)
  • CVE-2026-12328 — Memory safety bugs present in Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird ESR 140.11, Firefox 151 and Thunderbird 151 (8.1 HIGH)
  • CVE-2026-12323 — Spoofing issue in the DOM: Core & HTML component (5.4 MEDIUM)
  • CVE-2026-12322 — Clickjacking issue in the Widget: Gtk component (5.4 MEDIUM)

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  • CVE-2026-12304 — Same-origin policy bypass in the Networking: Cookies component (9.1 CRITICAL)
  • CVE-2026-47825 — Spring Cloud Gateway Server forwards the X-Forwarded-For and Forwarded headers from untrusted proxies in certain configuration scenarios (8.6 HIGH)
  • CVE-2026-9595 — Impact: When a user-configured proxy on webpack-dev-server has a broad context (e.g (5.3 MEDIUM)
  • CVE-2026-11624 — The Model Context Protocol has a security warning advising servers to validate the "Origin" header on all incoming connections to prevent...
  • CVE-2026-45173 — Idira Identity Browser Extension (Chrome, Firefox, and Edge builds) versions prior to 26.8.1 exhibit an origin validation flaw within its...