CVE-2026-6772
Received Received - Intake
Boundary Condition Error in NSS Libraries Causes Potential Memory Issues

Publication date: 2026-04-21

Last updated on: 2026-04-22

Assigner: Mozilla Corporation

Description
Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
CVSS Scores
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Meta Information
Published
2026-04-21
Last Modified
2026-04-22
Generated
2026-06-16
AI Q&A
2026-04-21
EPSS Evaluated
2026-06-15
NVD
CVE-2026-6772
EUVD
EUVD-2026-24113
Affected Vendors & Products
Showing 4 associated CPEs
Vendor Product Version / Range
mozilla firefox to 150.0 (exc)
mozilla firefox to 115.35.0 (exc)
mozilla firefox From 140.0 (inc) to 140.10.0 (exc)
mozilla thunderbird to 140.10.0 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-754 The product does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the product.
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Executive Summary

This vulnerability involves incorrect boundary conditions in the Libraries component of NSS (Network Security Services).

It was addressed and fixed in Firefox versions 150, Firefox ESR 115.35, and Firefox ESR 140.10.

Mitigation Strategies

To mitigate this vulnerability, update Firefox to version 150 or later, or update Firefox ESR to versions 115.35 or 140.10 or later where the issue has been fixed.

Impact Analysis

This vulnerability in the Libraries component of NSS involves incorrect boundary conditions, which can lead to a high impact on confidentiality as indicated by the CVSS score (C:H). It means that an attacker could potentially access sensitive information without requiring privileges or user interaction.

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