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Mozilla Firefox EUVDEUVD-2026-24108

| CVE-2026-6767 MEDIUM
Buffer Overflow (CWE-119)
2026-04-21 mozilla GHSA-38r2-pp9w-hfh6
Mozilla Buffer Overflow Red Hat Suse
5.3
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
5.3 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
SUSE
MEDIUM
qualitative
Red Hat
6.1 MEDIUM
qualitative

Primary rating from NVD.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

Lifecycle Timeline

6
Patch released
Apr 29, 2026 - 02:30 nvd
Patch available
Analysis Generated
Apr 21, 2026 - 19:22 vuln.today
CVSS changed
Apr 21, 2026 - 19:22 NVD
5.3 (None) 5.3 (MEDIUM)
EUVD ID Assigned
Apr 21, 2026 - 13:15 euvd
EUVD-2026-24108
Analysis Generated
Apr 21, 2026 - 13:15 vuln.today
CVE Published
Apr 21, 2026 - 12:41 nvd
MEDIUM 5.3

DescriptionCVE.org

Other issue in the Libraries component in NSS. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10.

AnalysisAI

Confidentiality compromise in Firefox NSS Libraries allows remote unauthenticated attackers to leak sensitive information over the network without user interaction. The vulnerability affects Firefox 150 and earlier, Firefox ESR 115.34 and earlier, and Firefox ESR 140.9 and earlier, and has been patched in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10. No public exploit code or active exploitation has been identified at the time of analysis.

Technical ContextAI

The vulnerability exists in Mozilla's Network Security Services (NSS) Libraries component, which handles cryptographic operations and secure communications protocols in Firefox. NSS is a fundamental library used for TLS/SSL connections and certificate validation. The issue is classified as CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer), indicating a buffer-related flaw that could permit out-of-bounds memory access. The affected CPE string (cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*) indicates all Firefox versions prior to the fix are potentially vulnerable. As a 'Libraries' component issue rather than a protocol parsing defect, this suggests the flaw exists in how NSS handles cryptographic operations or memory management rather than in browser-specific code.

RemediationAI

Update Firefox to version 150 or later, Firefox ESR 115 to version 115.35 or later, or Firefox ESR 140 to version 140.10 or later. These versions contain the upstream fix to the NSS Libraries component. Users on Firefox ESR branches should prioritize updating based on their ESR track (choose either ESR 115 or ESR 140, not both). Manual installation of the latest stable or ESR release is straightforward through Firefox's built-in update mechanism (Help > About Firefox) or by downloading from mozilla.org. No workarounds are available for environments unable to immediately patch; the buffer overflow in NSS cannot be mitigated through configuration alone. Consider blocking outbound TLS connections through proxies until patching is complete only if the NSS vulnerability is exploitable through active network reconnaissance (status unknown), otherwise standard patch management timelines apply.

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Same weakness CWE-119 – Buffer Overflow

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Vendor StatusVendor

SUSE

Severity: Medium
Product Status
SUSE Liberty Linux 10 Fixed
SUSE Liberty Linux 8 Fixed
SUSE Liberty Linux 9 Fixed
SUSE Linux Enterprise Server 16.0 SUSE Linux Enterprise Server for SAP applications 16.0 Fixed
openSUSE Leap 16.0 Fixed

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EUVD-2026-24108 vulnerability details – vuln.today
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