CVE-2025-49709

Name: CVE-2025-49709
Creator: NVD / NIST
Published: 2025-06-11T12:15:26.977+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.58%

Last modified Jun 17, 2026

CVE-2025-49709 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Certain canvas operations could have lead to memory corruption. This vulnerability was fixed in Firefox 139.0.4.. EPSS estimates a 0.58% chance of exploitation in the next 30 days.

Description

Certain canvas operations could have lead to memory corruption. This vulnerability was fixed in Firefox 139.0.4.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

0.58%

43.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 139.0.4

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1966083Permissions Required
https://www.mozilla.org/security/advisories/mfsa2025-47/Vendor Advisory

Timeline

Published: Jun 11, 2025
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2025-49709?

Certain canvas operations could have lead to memory corruption. This vulnerability was fixed in Firefox 139.0.4.

How severe is CVE-2025-49709?

CVE-2025-49709 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.58% probability of exploitation in the next 30 days.

How do I fix CVE-2025-49709?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-49709?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST