CVE catalog

CVE-2026-92543

Severity: High · CVSS 7.6CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published: Oct 7, 2026, 4:44:21 PM UTC
Updated: Oct 7, 2026, 5:17:02 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.09% · Oct 25, 2026

Docker Engine classifies a registry hostname as insecure using an any-match DNS check. loadInsecureRegistries() injects 127.0.0.0/8 and ::1/128 as insecure CIDRs by default. isCIDRMatch resolves all of the hostname's addresses and returns true if a single address is in the insecure CIDR list. Because the transport re-dials the hostname rather than the CIDR-matching address, a DNS answer set of one loopback IP plus a non-loopback attacker IP disables certificate verification and enables HTTP fallback for the registry connection.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	docker.io	sid	`28.5.2+dfsg4-5`	vulnerable
Debian	docker.io	forky	`28.5.2+dfsg4-5`	vulnerable
Debian	docker.io	trixie	`26.1.5+dfsg1-9+deb13u1`	vulnerable
Debian	docker.io	trixie-security	`26.1.5+dfsg1-9+deb13u1`	vulnerable
Debian	docker.io	bookworm	`20.10.24+dfsg1-1+deb12u1`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	docker.io	source	sid	`(unfixed)`	not yet assigned	Not reported	Not reported
Debian	docker.io	source	forky	`(unfixed)`	not yet assigned	Not reported	Not reported
Debian	docker.io	source	trixie	`(unfixed)`	not yet assigned	Not reported	Not reported
Debian	docker.io	source	bookworm	`(unfixed)`	not yet assigned	Not reported	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[docker-doc]Affected
Source package: [docker.io]
Details (2)
- 20.10.24+dfsg1-1+deb12u1 · all · bookworm
  Affected
  nvd · docker.io · debian · bookworm; nvd · docker.io · debian · 12
- 20.10.24+dfsg1-1+deb12u1 · all · bookworm
  Affected
  nvd · docker.io · debian · bookworm; nvd · docker.io · debian · 12
[docker.io]Affected
Source package: [docker.io]
Details (2)
- 20.10.24+dfsg1-1+deb12u1+b6 · amd64 · bookworm
  Affected
  nvd · docker.io · debian · bookworm; nvd · docker.io · debian · 12
- 20.10.24+dfsg1-1+deb12u1+b6 · arm64 · bookworm
  Affected
  nvd · docker.io · debian · bookworm; nvd · docker.io · debian · 12
[golang-github-docker-docker-dev]Affected
Source package: [docker.io]
Details (2)
- 20.10.24+dfsg1-1+deb12u1 · all · bookworm
  Affected
  nvd · docker.io · debian · bookworm; nvd · docker.io · debian · 12
- 20.10.24+dfsg1-1+deb12u1 · all · bookworm
  Affected
  nvd · docker.io · debian · bookworm; nvd · docker.io · debian · 12

[Debian 13 (Trixie)]

[docker-cli]Affected
Source package: [docker.io]
Details (4)
- 26.1.5+dfsg1-9+b13 · amd64 · trixie
  Affected
  nvd · docker.io · debian · 13
- 26.1.5+dfsg1-9+b13 · arm64 · trixie
  Affected
  nvd · docker.io · debian · 13
- 26.1.5+dfsg1-9+deb13u1 · amd64 · trixie-security
  Affected
  nvd · docker.io · debian · 13
- 26.1.5+dfsg1-9+deb13u1 · arm64 · trixie-security
  Affected
  nvd · docker.io · debian · 13
[docker-doc]Affected
Source package: [docker.io]
Details (4)
- 26.1.5+dfsg1-9 · all · trixie
  Affected
  nvd · docker.io · debian · 13
- 26.1.5+dfsg1-9 · all · trixie
  Affected
  nvd · docker.io · debian · 13
- 26.1.5+dfsg1-9+deb13u1 · all · trixie-security
  Affected
  nvd · docker.io · debian · 13
- 26.1.5+dfsg1-9+deb13u1 · all · trixie-security
  Affected
  nvd · docker.io · debian · 13
[docker.io]Affected
Details (4)
- 26.1.5+dfsg1-9+b13 · amd64 · trixie
  Affected
  nvd · docker.io · debian · 13
- 26.1.5+dfsg1-9+b13 · arm64 · trixie
  Affected
  nvd · docker.io · debian · 13
- 26.1.5+dfsg1-9+deb13u1 · amd64 · trixie-security
  Affected
  nvd · docker.io · debian · 13
- 26.1.5+dfsg1-9+deb13u1 · arm64 · trixie-security
  Affected
  nvd · docker.io · debian · 13
[golang-github-docker-docker-dev]Affected
Source package: [docker.io]
Details (4)
- 26.1.5+dfsg1-9 · all · trixie
  Affected
  nvd · docker.io · debian · 13
- 26.1.5+dfsg1-9 · all · trixie
  Affected
  nvd · docker.io · debian · 13
- 26.1.5+dfsg1-9+deb13u1 · all · trixie-security
  Affected
  nvd · docker.io · debian · 13
- 26.1.5+dfsg1-9+deb13u1 · all · trixie-security
  Affected
  nvd · docker.io · debian · 13

Observed: Oct 27, 2026, 4:45:58 AM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]