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SCA: security update for github.com/coredns/coredns (GHSA-vp29-5652-4fw9)

high Tenable Cloud Security Plugin ID 440958

Description

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

 - CoreDNS is a DNS server written in Go. In versions prior to 1.14.3, the gRPC, QUIC, DoH, and DoH3
 transport implementations incorrectly handle TSIG authentication. For gRPC and QUIC, the server checks
 whether the TSIG key name exists in the configuration but never calls dns.TsigVerify() to validate the
 HMAC. If the key name matches a configured key, the tsigStatus field remains nil and the tsig plugin
 treats the request as successfully authenticated regardless of the MAC value. For DoH and DoH3, the issue
 is more severe: the DoHWriter.TsigStatus() method unconditionally returns nil, and the server never
 inspects the TSIG record at all. Any request containing a TSIG record is treated as authenticated over DoH
 and DoH3, even if the key name is invalid and the MAC is arbitrary. An unauthenticated network attacker
 can exploit this to bypass TSIG-protected functionality such as AXFR/IXFR zone transfers, dynamic DNS
 updates, or other TSIG-gated plugin behavior. The DoH and DoH3 variants have a lower exploitation bar
 because the attacker does not need to know a valid TSIG key name. This issue has been fixed in version
 1.14.3. As a workaround, disable gRPC, QUIC, DoH, and DoH3 listeners where TSIG authentication is
 required, or restrict network-level access to affected transport ports to trusted sources only.
 (CVE-2026-35579)

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-vp29-5652-4fw9

Plugin Details

Severity: High

ID: 440958

Version: Revision 1.6

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: Medium

Score: 4.9

Percentile: 58.03

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

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

CVSS Score Source: CVE-2026-35579

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

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

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

CVSS v4

Risk Factor: High

Base Score: 8.2

Threat Score: 6.9

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/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-2026-35579

cwe: CWE-287