What’s Vulnerable › Vulnerabilities

CVE-2025-9180: Same-origin policy bypass in the Graphics: Canvas2D component

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-08-19 · updated 2026-10-05
• Weakness: CWE-346

Description

Same-origin policy bypass in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 142, Firefox ESR 115.27, Firefox ESR 128.14, Firefox ESR 140.2, Thunderbird 142, Thunderbird 128.14, and Thunderbird 140.2.

Affected products

• Mozilla Firefox: before 115.27.0; before 142.0; from 128.0 before 128.14.0; from 140.0 before 140.2.0 — fixed in 115.27.0, 128.14.0, 140.2.0, 142.0
• Mozilla Thunderbird: before 128.14.0; before 142.0; from 140.0 before 140.2.0 — fixed in 128.14.0, 140.2.0, 142.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 115.27.0, 128.14.0, 140.2.0, 142.0; Mozilla Thunderbird 128.14.0, 140.2.0, 142.0. Check the vendor advisory for mitigations.

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=1979782
• https://www.mozilla.org/security/advisories/mfsa2025-64/
• https://www.mozilla.org/security/advisories/mfsa2025-65/
• https://www.mozilla.org/security/advisories/mfsa2025-66/
• https://www.mozilla.org/security/advisories/mfsa2025-67/
• https://www.mozilla.org/security/advisories/mfsa2025-70/
• https://www.mozilla.org/security/advisories/mfsa2025-71/
• https://www.mozilla.org/security/advisories/mfsa2025-72/
• https://lists.debian.org/debian-lts-announce/2025/08/msg00016.html
• https://lists.debian.org/debian-lts-announce/2025/08/msg00018.html

Get alerted when CVE-2025-9180 or the next vulnerability affects your stack