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SCA: security update for github.com/coredns/coredns (GHSA-63cw-r7xf-jmwr)

high Tenable Self-Hosted Container Security Plugin ID 440954

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - CoreDNS is a DNS server that chains plugins. In versions prior to 1.14.3, the DNS-over-HTTPS (DoH) GET
 path accepts oversized dns= query parameter values and performs URL query parsing, base64 decoding, and
 DNS message unpacking before rejecting the request. Unlike the POST path, which applies a bounded read via
 http.MaxBytesReader limited to 65536 bytes, the GET path has no equivalent size validation before
 expensive processing. A remote, unauthenticated attacker can repeatedly send oversized DoH GET requests to
 force high CPU usage, large transient memory allocations, and elevated garbage-collection pressure,
 leading to denial of service. This issue has been fixed in version 1.14.3. (CVE-2026-32936)

Solution

Update the github.com/coredns/coredns library and its related packages to version 1.14.3 or later.

See Also

https://github.com/advisories/GHSA-63cw-r7xf-jmwr

Plugin Details

Severity: High

ID: 440954

Version: Revision 1.8

Type: Local

Family: SCA Checks

Published: 4/29/2026

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.73

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.1

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

CVSS Score Source: CVE-2026-32936

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

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

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

CVSS v4

Risk Factor: High

Base Score: 8.7

Threat Score: 7.7

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/28/2026

Vulnerability Publication Date: 4/28/2026

Reference Information

CVE: CVE-2026-32936

cwe: CWE-400