EUVD-2026-60753
GHSA-9x2q-3qm9-cw76
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Network-delivered via crafted page, no privileges needed, user must visit page (UI:R); full memory corruption impact justifies C:H/I:H/A:H.
Primary rating from Vendor (mozilla).
CVSS VectorVendor: mozilla
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Lifecycle Timeline
3DescriptionCVE.org
Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, and Firefox ESR 153.1.
Articles & Coverage 1
AnalysisAI
Privilege escalation via incorrect boundary conditions in Firefox's Graphics: CanvasWebGL component allows remote attackers to achieve high-impact code execution by luring users to a crafted web page. The flaw affects all Firefox releases prior to version 154 and multiple ESR branches (115.x, 140.x, 153.x), making the exposure broad across both consumer and enterprise deployments. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | User interaction is required: the victim must navigate to an attacker-controlled web page or one serving malicious WebGL content (confirmed by UI:R in the CVSS vector). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 8.8 vector (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) reflects a network-reachable, low-complexity flaw requiring only a single user interaction - visiting a malicious page - with no privileges needed and full confidentiality, integrity, and availability impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker hosts a web page embedding malicious WebGL shader or canvas operations crafted to trigger the out-of-bounds memory access in the CanvasWebGL component. When a Firefox user visits or is redirected to the page - via phishing, malvertising, or a compromised site - the boundary check failure is triggered in the graphics pipeline, potentially overwriting adjacent memory to escalate privileges within the browser process and achieve arbitrary code execution at the OS user level. … |
| Remediation | The primary fix is to upgrade to Firefox 154 or to the appropriate patched ESR release: Firefox ESR 115.39, Firefox ESR 140.14, or Firefox ESR 153.1, as documented in Mozilla security advisories mfsa2026-74 through mfsa2026-77 at https://www.mozilla.org/security/advisories/ and the associated Bugzilla report at https://bugzilla.mozilla.org/show_bug.cgi?id=2059997. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Inventory vulnerable Firefox installations (versions before 154, ESR 115.x/140.x/153.x) across the organization and classify by risk exposure based on user access patterns to untrusted web content. …
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Same weakness CWE-119 – Buffer Overflow
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External POC / Exploit Code
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