Detections
Analytics
SCA: security update for github.com/cert-manager/cert-manager (GHSA-gx3x-vq4p-mhhv)
medium Tenable Self-Hosted Container Security Plugin ID 437450
Description
There are packages installed that are affected by a vulnerability referenced in the following CVE:- cert-manager adds certificates and certificate issuers as resource types in Kubernetes clusters, and
simplifies the process of obtaining, renewing and using those certificates. In versions from 1.18.0 to
before 1.18.5 and from 1.19.0 to before 1.19.3, the cert-manager-controller performs DNS lookups during
ACME DNS-01 processing (for zone discovery and propagation self-checks). By default, these lookups use
standard unencrypted DNS. An attacker who can intercept and modify DNS traffic from the cert-manager-
controller pod can insert a crafted entry into cert-manager's DNS cache. Accessing this entry will trigger
a panic, resulting in denial‑of‑service (DoS) of the cert-manager controller. The issue can also be
exploited if the authoritative DNS server for the domain being validated is controlled by a malicious
actor. This issue has been patched in versions 1.18.5 and 1.19.3. (CVE-2026-25518)
See Also
Plugin Details
Severity: Medium
ID: 437450
Version: Revision 1.10
Type: Local
Family: SCA Checks
Published: 2/3/2026
Updated: 7/2/2026
Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security
Risk Information
VPR
Risk Factor: Low
Score: 3
Percentile: 23.42
Vendor
Vendor Severity: Medium
CVSS v2
Risk Factor: Medium
Base Score: 5.4
Temporal Score: 4
Vector: CVSS2#AV:N/AC:H/Au:N/C:N/I:N/A:C
CVSS Score Source: CVE-2026-25518
CVSS v3
Risk Factor: Medium
Base Score: 5.9
Temporal Score: 5.2
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
Exploit Ease: No known exploits are available
Patch Publication Date: 2/2/2026
Vulnerability Publication Date: 2/2/2026
Reference Information
CVE: CVE-2026-25518