Detections
Analytics
FreeBSD : nginx -- multiple vulnerabilities (08b0c0f6-6a85-11f1-b8e5-3497f65b111b)
critical Nessus Plugin ID 321716
Synopsis
The remote FreeBSD host is missing one or more security-related updates.Description
The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the 08b0c0f6-6a85-11f1-b8e5-3497f65b111b advisory.The nginx developers report:
A use-after-free vulnerability when using HTTP/3 and processing a specially crafted QUIC session may allow memory corruption or a segmentation fault in a worker process (CVE-2026-42530).
A heap memory buffer overflow vulnerability when using the ignore_invalid_headers off; and large_client_header_buffers directives with large configured values while proxying a specially crafted request to an HTTP/2 or gRPC backend may allow memory corruption or a segmentation fault in a worker process (CVE-2026-42055).
A heap memory buffer overread vulnerability while handling a specially crafted response with decoding from UTF-8 via the charset_map directive may allow limited disclosure of worker process memory or a segmentation fault in a worker process (CVE-2026-48142).
Tenable has extracted the preceding description block directly from the FreeBSD 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 packages.See Also
Plugin Details
Severity: Critical
ID: 321716
File Name: freebsd_pkg_08b0c0f66a8511f1b8e53497f65b111b.nasl
Version: 1.1
Type: Local
Family: FreeBSD Local Security Checks
Published: 6/20/2026
Updated: 6/20/2026
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Critical
Score: 9.2
CVSS v2
Risk Factor: High
Base Score: 7.6
Temporal Score: 5.6
Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:C
CVSS Score Source: CVE-2026-42530
CVSS v3
Risk Factor: High
Base Score: 8.1
Temporal Score: 7.1
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS v4
Risk Factor: Critical
Base Score: 9.2
Threat Score: 7.2
Threat Vector: CVSS:4.0/E:U
Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Vulnerability Information
CPE: p-cpe:/a:freebsd:freebsd:nginx-devel, cpe:/o:freebsd:freebsd
Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info
Exploit Ease: No known exploits are available
Patch Publication Date: 6/17/2026
Vulnerability Publication Date: 6/17/2026