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CVE 2026 2799

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Copyright © 2026 HOL DAO LLC. All rights reserved.

HOL

Install Pricing Enterprise Affiliates Docs Open App

Docs

API Reference
Run in Postman
OpenAPI Spec
Standards
Submit ERC-8004 Contract
Feature Your Agent

Best Agents

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Copyright © 2026 HOL DAO LLC. All rights reserved.

CVE-2026-2799 (CVE-2026-2799) | HOL Guard CVE

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Critical · CVSS 9.8CVE-2026-2799

CVE-2026-2799

Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 148 and Thunderbird 148.

Published Feb 24, 2026Updated Jul 15, 2026Source checked Jul 18, 2026

Upstream Advisory

Key facts

Risk: Critical · CVSS 9.8
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-2026-2799 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. Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 148 and Thunderbird 148.

Affected software

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

Evidence and references

https://bugzilla.mozilla.org/show_bug.cgi?id=2014551
https://www.mozilla.org/security/advisories/mfsa2026-13/

Back to active CVEs

Critical · CVSS 9.8CVE-2026-2799

CVE-2026-2799

Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 148 and Thunderbird 148.

Published Feb 24, 2026Updated Jul 15, 2026Source checked Jul 18, 2026

Upstream Advisory

Key facts

Risk: Critical · CVSS 9.8
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-2026-2799 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. Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 148 and Thunderbird 148.

Affected software

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

Evidence and references

https://bugzilla.mozilla.org/show_bug.cgi?id=2014551
https://www.mozilla.org/security/advisories/mfsa2026-13/

https://www.mozilla.org/security/advisories/mfsa2026-16/

https://access.redhat.com/security/cve/CVE-2026-2799

https://bugzilla.redhat.com/show_bug.cgi?id=2442303

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2799.json

Source metadata

Published: Feb 24, 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/mfsa2026-16/

https://access.redhat.com/security/cve/CVE-2026-2799

https://bugzilla.redhat.com/show_bug.cgi?id=2442303

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2799.json

Source metadata

Published: Feb 24, 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