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Install Pricing Enterprise Affiliates Docs Open App

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Run in Postman
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Copyright © 2026 HOL DAO LLC. All rights reserved.

CVE-2026-6784 (CVE-2026-6784) | HOL Guard CVE

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High · CVSS 7.5CVE-2026-6784

CVE-2026-6784

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.

Published Apr 21, 2026Updated Jul 15, 2026Source checked Jul 18, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.5
Exploitation: No known exploitation
Affected software: Not mapped
Fix availability: Not reported

Recommended action

Review the upstream advisory, identify the affected product in your inventory, and apply the vendor update when one is available.

What this means

CVE-2026-6784 is listed in the HOL Guard supply-chain feed, but affected software is not mapped to a package. Review the upstream advisory for the affected product and vendor guidance. 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.

Affected software

Affected software not mapped. Review the upstream record for vendor-specific product and version guidance.

Evidence and references

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

Back to active CVEs

High · CVSS 7.5CVE-2026-6784

CVE-2026-6784

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.

Published Apr 21, 2026Updated Jul 15, 2026Source checked Jul 18, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.5
Exploitation: No known exploitation
Affected software: Not mapped
Fix availability: Not reported

Recommended action

Review the upstream advisory, identify the affected product in your inventory, and apply the vendor update when one is available.

What this means

CVE-2026-6784 is listed in the HOL Guard supply-chain feed, but affected software is not mapped to a package. Review the upstream advisory for the affected product and vendor guidance. 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.

Affected software

Affected software not mapped. Review the upstream record for vendor-specific product and version guidance.

Evidence and references

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

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

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

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

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

Source metadata

Published: Apr 21, 2026
Modified: Jul 15, 2026
Source checked: Jul 18, 2026

Reported by NVD (nvd).

Keep this signal in your Guard workflow.

HOL Guard can help your team monitor supply-chain activity while the upstream record is clarified.

Explore HOL Guard

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

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

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

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

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

Source metadata

Published: Apr 21, 2026
Modified: Jul 15, 2026
Source checked: Jul 18, 2026

Reported by NVD (nvd).

Keep this signal in your Guard workflow.

HOL Guard can help your team monitor supply-chain activity while the upstream record is clarified.

Explore HOL Guard