Detections
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EulerOS 2.0 SP13 : bison (EulerOS-SA-2026-4123)
medium Nessus Plugin ID 364792
Synopsis
The remote EulerOS host is missing multiple security updates.Description
According to the versions of the bison packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :A vulnerability was found in GNU Bison (affected version not known) and classified as critical. Affected by this issue is the function execvp of the component HTML Report Generation. Applying the patch 3169c1e7a2c6acc4c59dfcf8b089896d6881925b is able to eliminate this problem.(CVE-2026-56389)
GNU Bison improperly handles grammardefined output paths. Grammar directives such as %output and %header allow specifying file paths, which are accepted without restriction and override callersupplied output options. When processing attacker-supplied grammar, this behavior allows directing generated files to arbitrary writable locations on the filesystem, potentially overwriting existing files accessible to the Bison process. Maintainers of this project were notified about this vulnerability, and fixed the issue in commit 8d101c19d4d9aaedf83a448c925513742d4efcf0. However, they did not provide vulnerable version range. Version 3.8.2 was tested and confirmed as vulnerable, other versions were not tested but might also be vulnerable.(CVE-2026-56390)
Tenable has extracted the preceding description block directly from the EulerOS bison 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 bison packages.See Also
Plugin Details
Severity: Medium
ID: 364792
File Name: EulerOS_SA-2026-4123.nasl
Version: 1.1
Type: Local
Family: Huawei Local Security Checks
Published: 10/12/2026
Updated: 10/12/2026
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: High
Score: 7.7
Percentile: 98.93
CVSS v2
Risk Factor: High
Base Score: 7.2
Temporal Score: 5.3
Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS Score Source: CVE-2026-56389
CVSS v3
Risk Factor: High
Base Score: 8.6
Temporal Score: 7.5
Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS v4
Risk Factor: Medium
Base Score: 6.8
Threat Score: 4.2
Threat Vector: CVSS:4.0/E:U
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:L/SC:L/SI:L/SA:L
Vulnerability Information
CPE: cpe:/o:huawei:euleros:2.0, p-cpe:/a:huawei:euleros:bison-help, p-cpe:/a:huawei:euleros:bison
Required KB Items: Host/local_checks_enabled, Host/cpu, Host/EulerOS/release, Host/EulerOS/rpm-list, Host/EulerOS/sp
Excluded KB Items: Host/EulerOS/uvp_version
Exploit Ease: No known exploits are available
Patch Publication Date: 10/10/2026
Vulnerability Publication Date: 7/29/2026
Reference Information
CVE: CVE-2026-56389, CVE-2026-56390