CVE-2026-74988
Received Received - Intake

Memory Corruption in Firefox ESR and Firefox

Publication date: 2026-08-18

Last updated on: 2026-08-18

Assigner: Mozilla Corporation

Description
Internally found bugs present in Firefox ESR 153.0 and Firefox 153. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 154 and Firefox ESR 153.1.

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Meta Information

Published
2026-08-18
Last Modified
2026-08-18
Generated
2026-08-18
AI Q&A
2026-08-18
EPSS Evaluated
N/A
NVD
CVE-2026-74988
EUVD
EUVD-2026-60699

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
mozilla firefox to 154 (exc)
mozilla firefox 154
mozilla firefox_esr to 153.1 (exc)
mozilla firefox_esr 153.1

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability involves internally found bugs in Firefox ESR 153.0 and Firefox 153 that may allow memory corruption or other security issues. Exploitation is possible with sufficient effort, though no active attacks have been confirmed.

Detection Guidance

This vulnerability affects Firefox ESR 153.0 and Firefox 153. Detection involves checking installed versions. Use commands like 'firefox --version' or 'firefox-esr --version' to verify if your version is vulnerable. If the version is 153 or lower, the system is affected.

Impact Analysis

An attacker could potentially exploit this to execute arbitrary code, crash the browser, or gain unauthorized access to system resources. Users running affected versions should update immediately.

Compliance Impact

The provided CVE data does not specify how this vulnerability impacts compliance with standards like GDPR or HIPAA. The description only mentions memory corruption or security defects in Firefox ESR 153.0 and Firefox 153, fixed in later versions.

Mitigation Strategies

Update Firefox to version 154 or Firefox ESR to version 153.1 or later to address the vulnerability.

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