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Fedora 43 : firefox / nss (2026-208add2041)

critical Nessus Plugin ID 342518

Synopsis

The remote Fedora host is missing one or more security updates.

Description

The remote Fedora 43 host has packages installed that are affected by multiple vulnerabilities as referenced in the FEDORA-2026-208add2041 advisory.

 NSS Release Notes

 Update NSS to 3.127.0

 - Bug 1869493 - Heap-buffer overflow in AES Keywrap.
 - Bug 2052210 - Generate additional test message for Thunderbird (HTML with remote image).
 - Bug 2052709 - Convert NSS 3.126 release notes to Markdown.
 - Bug 2053831 - clang format.
 - Bug 2054609 - remove cipher suite order exception from bug 946147.
 - Bug 2054714 - avoid leaking stale ECH outer extensions across HRR.
 - Bug 2054719 - fix content type tag for CMS AuthEnvelopedData plaintext.
 - Bug 2056291 - remove support for pre-v1.0 PKCS#12.
 - Bug 2056846 - Remove unused policy string callback to fix -Wunused-but-set-global.
 - Bug 2057184 - Enable -Wunused-but-set-variable/-global in werror.py.
 - Bug 2059176 - EC_DerivePublicKey() failure is not propagated in sftk_mkPrivKey().
 - Bug 2060118 - remove DH_GenParam support.
 - Bug 2060720 - Round ECH ClientHelloInner padding up to a multiple of 32.
 - Bug 2061107 - restore pkcs12.h for source compatibility.
 - Bug 2063071 - make selfserv listen on IPv6 wildcard on dual-stack hosts.

 https://firefox-source-docs.mozilla.org/security/nss/releases/nss_3_127.html

 - Updated Firefox to latest upstream (155.0)

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected firefox and / or nss packages.

See Also

https://bodhi.fedoraproject.org/updates/FEDORA-2026-208add2041

Plugin Details

Severity: Critical

ID: 342518

File Name: fedora_2026-208add2041.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 9/3/2026

Updated: 9/3/2026

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 93.48

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2026-84131

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS Score Source: CVE-2026-84129

Vulnerability Information

CPE: cpe:/o:fedoraproject:fedora:43, p-cpe:/a:fedoraproject:fedora:firefox, p-cpe:/a:fedoraproject:fedora:nss

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 8/28/2026

Vulnerability Publication Date: 8/28/2026

Reference Information

CVE: CVE-2026-84118, CVE-2026-84119, CVE-2026-84120, CVE-2026-84121, CVE-2026-84122, CVE-2026-84123, CVE-2026-84124, CVE-2026-84125, CVE-2026-84126, CVE-2026-84128, CVE-2026-84129, CVE-2026-84130, CVE-2026-84131, CVE-2026-84132, CVE-2026-84133, CVE-2026-84134, CVE-2026-84136, CVE-2026-84137, CVE-2026-84138, CVE-2026-84139, CVE-2026-84140, CVE-2026-84141, CVE-2026-84142, CVE-2026-84143, CVE-2026-84144, CVE-2026-84145