CVE-2026-6784

Description

Memory safety bugs present in Firefox 149 and Thunderbird 149. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 150 and Thunderbird 150.

References

https://www.mozilla.org/security/advisories/mfsa2026-33/

https://www.mozilla.org/security/advisories/mfsa2026-30/

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-6784.json

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-24125

https://bugzilla.redhat.com/show_bug.cgi?id=2460084

https://bugzilla.mozilla.org/buglist.cgi?bug_id=1536243%2C1745382%2C1851073%2C1893400%2C1963301%2C2001319%2C2002899%2C2012436%2C2014435%2C2016901%2C2019916%2C2020486%2C2020612%2C2020817%2C2021788%2C2022051%2C2022367%2C2022431%2C2023302%2C2023670%2C2024225%2C2024238%2C2024240%2C2024265%2C2024367%2C2024369%2C2024424%2C2024760%2C2025281%2C2025361%2C2025387%2C2025466%2C2025954%2C2025958%2C2026278%2C2026292%2C2026297%2C2026378%2C2027148%2C2027287%2C2027341%2C2027384%2C2027427%2C2027694%2C2027993%2C2028009%2C2028270%2C2028416%2C2028524%2C2029295%2C2029699%2C2029800%2C2029801

https://access.redhat.com/security/cve/CVE-2026-6784

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

EPSS