What’s Vulnerable › Vulnerabilities

CVE-2019-9797

• Severity: medium (CVSS 5.3 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-04-26 · updated 2026-06-17
• Weakness: CWE-346

Description

Cross-origin images can be read in violation of the same-origin policy by exporting an image after using createImageBitmap to read the image and then rendering the resulting bitmap image within a canvas element. This vulnerability affects Firefox < 66.

Affected products

• Mozilla Firefox: before 66.0 — fixed in 66.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 66.0. Check the vendor advisory for mitigations.

References

• http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00002.html
• http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00029.html
• http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00084.html
• https://access.redhat.com/errata/RHSA-2019:1265
• https://access.redhat.com/errata/RHSA-2019:1267
• https://access.redhat.com/errata/RHSA-2019:1269
• https://access.redhat.com/errata/RHSA-2019:1308
• https://access.redhat.com/errata/RHSA-2019:1309
• https://access.redhat.com/errata/RHSA-2019:1310
• https://bugzilla.mozilla.org/show_bug.cgi?id=1528909
• https://lists.debian.org/debian-lts-announce/2019/05/msg00032.html
• https://lists.debian.org/debian-lts-announce/2019/05/msg00038.html

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