Detections
Analytics
RHEL 10 : nghttp2 (RHSA-2026:54650)
medium Nessus Plugin ID 335255
Synopsis
The remote Red Hat host is missing a security update for nghttp2.Description
The remote Redhat Enterprise Linux 10 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:54650 advisory.libnghttp2 is a library implementing the Hypertext Transfer Protocol version 2 (HTTP/2) protocol in C.
Security Fix(es):
* nghttp2: nghttp2: HTTP Request/Response Smuggling and Response-Queue Poisoning via ambiguous HTTP/1.1 Upgrade requests (CVE-2026-58055)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Update the RHEL nghttp2 package based on the guidance in RHSA-2026:54650.See Also
https://access.redhat.com/errata/RHSA-2026:54650
https://access.redhat.com/security/updates/classification/#moderate
Plugin Details
Severity: Medium
ID: 335255
File Name: redhat-RHSA-2026-54650.nasl
Version: 1.1
Type: Local
Agent: unix
Family: Red Hat Local Security Checks
Published: 8/13/2026
Updated: 8/13/2026
Supported Sensors: Nessus Agent, Continuous Assessment, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.3
Percentile: 53.62
Vendor
Vendor Severity: Moderate
CVSS v2
Risk Factor: Medium
Base Score: 4
Temporal Score: 3.1
Vector: CVSS2#AV:N/AC:H/Au:N/C:P/I:P/A:N
CVSS Score Source: CVE-2026-58055
CVSS v3
Risk Factor: Medium
Base Score: 5.4
Temporal Score: 4.9
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
CVSS v4
Risk Factor: Medium
Base Score: 6.3
Threat Score: 2.9
Threat Vector: CVSS:4.0/E:P
Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:L/SA:N
Vulnerability Information
CPE: cpe:/o:redhat:enterprise_linux:10.2, p-cpe:/a:redhat:enterprise_linux:libnghttp2-devel, p-cpe:/a:redhat:enterprise_linux:libnghttp2, p-cpe:/a:redhat:enterprise_linux:nghttp2
Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 8/13/2026
Vulnerability Publication Date: 6/28/2026
Reference Information
CVE: CVE-2026-58055
CWE: 444
RHSA: 2026:54650