CVE catalog

CVE-2026-42769

Severity: Medium · CVSS 5.9CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N
Published: Jun 9, 2026, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.54% · Oct 25, 2026

Issue Summary: An error in the callback used to verify the certificate provided in a Root CA key update Certificate Management Protocol (CMP) message response rendered the certificate validation ineffectual, which could lead to escalation of credentials from the Registration Authority (RA) level to the root Certification Authority (root CA) level. Impact Summary: The Registration Autority could replace the root CA certificate for the CMP clients with an arbitrary root CA certificate. One of the parts of the Certificate Management Protocol (CMP), specified in RFC 9810, is Root Certification Authority (root CA) key Rollover, which is sent by the server in a message with type 'id-it-rootCaKeyUpdate'. As part of these messages, 'newWithOld' certificate, the new root CA certificate signed with the old root CA key, is provided, and verifying its signature is crucial for transferring the trust from the old CA key to the new one. The 'id-it-rootCaKeyUpdate' messages are expected to be processed with OSSL_CMP_get1_rootCaKeyUpdate(), that is expected to verify the 'newWithOld' certificate. A typo in the certificate chain building code led to adding an incorrect certificate ('newWithOld' instead of 'oldRoot') to the certificate chain, rendering the certificate verification process ineffectual (only the issuer name and the algorithm OIDs were verified by other parts of the verification code). An attacker who already has credentials that satisfy the CMP message protection checks can generate a new key pair and use a crafted self-signed certificate in its 'id-it-rootCaKeyUpdate' CMP messages which affected CMP clients would accept as a new trust anchor. Significant preconditions for the attack (having valid RA-level credentials) are the reason the issue was assigned Low severity. The FIPS modules are not affected by this issue, as the affected code is outside the OpenSSL FIPS module boundary.

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	openssl	sid	`3.6.5-1`	fixed
Debian	openssl	forky	`3.6.5-1`	fixed
Debian	openssl	trixie	`3.5.7-1~deb13u2`	fixed
Debian	openssl	trixie-security	`3.5.7-1~deb13u3`	fixed
Debian	openssl	bookworm	`3.0.20-1~deb12u2`	not affected
Debian	openssl	bookworm-security	`3.0.22-1~deb12u2`	not affected
Cpe	openssl	Not reported	`3.0.13-0ubuntu3.11`	fixed
Cpe	libssl-dev	Not reported	`3.0.13-0ubuntu3.11`	fixed
Cpe	libssl-doc	Not reported	`3.0.13-0ubuntu3.11`	fixed
Cpe	libssl3t64	Not reported	`3.0.13-0ubuntu3.11`	fixed
Cpe	openssl	Not reported	`3.4.6`	fixed
Cpe	openssl	Not reported	`3.5.7`	fixed
Cpe	openssl	Not reported	`3.6.3`	fixed
Cpe	openssl	Not reported	Not reported	unknown
Cpe	openssl	Not reported	Not reported	not affected
Alpine	openssl	3.22	`3.5.7-r0`	fixed
Alpine	openssl	3.23	`3.5.7-r0`	fixed
Alpine	openssl	3.24	`3.5.7-r0`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	openssl	source	sid	`3.6.3-1`	not yet assigned	Not reported	[1139674]
Debian	openssl	source	forky	`3.6.3-1`	not yet assigned	Not reported	[1139674]
Debian	openssl	source	trixie	`3.5.6-1~deb13u2`	not yet assigned	Not reported	[1139674]
Debian	openssl	source	bookworm	`Not affected`	unimportant	Not reported	[1139674]
Cpe	openssl	cpe	Not reported	`3.0.13-0ubuntu3.11`	Not reported	Not reported	Not reported
Cpe	libssl-dev	cpe	Not reported	`3.0.13-0ubuntu3.11`	Not reported	Not reported	Not reported
Cpe	libssl-doc	cpe	Not reported	`3.0.13-0ubuntu3.11`	Not reported	Not reported	Not reported
Cpe	libssl3t64	cpe	Not reported	`3.0.13-0ubuntu3.11`	Not reported	Not reported	Not reported
Cpe	openssl	cpe	Not reported	`3.4.6`	Not reported	Not reported	Not reported
Cpe	openssl	cpe	Not reported	`3.5.7`	Not reported	Not reported	Not reported
Cpe	openssl	cpe	Not reported	`3.6.3`	Not reported	Not reported	Not reported
Alpine	openssl	apk	3.22	`3.5.7-r0`	Not reported	ALPINE-CVE-2026-42769	Not reported
Alpine	openssl	apk	3.23	`3.5.7-r0`	Not reported	ALPINE-CVE-2026-42769	Not reported
Alpine	openssl	apk	3.24	`3.5.7-r0`	Not reported	ALPINE-CVE-2026-42769	Not reported

[Debian bug #1139674]

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libssl3]Not affected
Source package: [openssl]
Details (6)
- 3.0.20-1~deb12u2 · amd64 · bookworm
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.20-1~deb12u2 · arm64 · bookworm
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.20-1~deb12u2 · amd64 · bookworm-security
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.20-1~deb12u2 · arm64 · bookworm-security
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.17-1~deb12u2 · amd64 · bookworm-updates
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.17-1~deb12u2 · arm64 · bookworm-updates
  Not affected
  nvd · openssl · debian · bookworm
[libssl-dev]Not affected
Source package: [openssl]
Details (6)
- 3.0.20-1~deb12u2 · amd64 · bookworm
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.20-1~deb12u2 · arm64 · bookworm
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.20-1~deb12u2 · amd64 · bookworm-security
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.20-1~deb12u2 · arm64 · bookworm-security
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.17-1~deb12u2 · amd64 · bookworm-updates
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.17-1~deb12u2 · arm64 · bookworm-updates
  Not affected
  nvd · openssl · debian · bookworm
[libssl-doc]Not affected
Source package: [openssl]
Details (6)
- 3.0.20-1~deb12u2 · all · bookworm
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.20-1~deb12u2 · all · bookworm
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.20-1~deb12u2 · all · bookworm-security
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.20-1~deb12u2 · all · bookworm-security
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.17-1~deb12u2 · all · bookworm-updates
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.17-1~deb12u2 · all · bookworm-updates
  Not affected
  nvd · openssl · debian · bookworm
[openssl]Not affected
Details (6)
- 3.0.20-1~deb12u2 · amd64 · bookworm
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.20-1~deb12u2 · arm64 · bookworm
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.20-1~deb12u2 · amd64 · bookworm-security
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.20-1~deb12u2 · arm64 · bookworm-security
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.17-1~deb12u2 · amd64 · bookworm-updates
  Not affected
  nvd · openssl · debian · bookworm
- 3.0.17-1~deb12u2 · arm64 · bookworm-updates
  Not affected
  nvd · openssl · debian · bookworm

[Debian 13 (Trixie)]

[libssl3t64]Fixed
Source package: [openssl]
Details (6)
- 3.5.6-1~deb13u2 · amd64 · trixie
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.6-1~deb13u2 · arm64 · trixie
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.6-1~deb13u2 · amd64 · trixie-security · Historical version
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u2 · amd64 · trixie-security · Historical version
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u2 · arm64 · trixie-security
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u3 · amd64 · trixie-security
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
[libssl-dev]Fixed
Source package: [openssl]
Details (6)
- 3.5.6-1~deb13u2 · amd64 · trixie
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.6-1~deb13u2 · arm64 · trixie
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.6-1~deb13u2 · amd64 · trixie-security · Historical version
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u2 · amd64 · trixie-security · Historical version
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u2 · arm64 · trixie-security
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u3 · amd64 · trixie-security
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
[libssl-doc]Fixed
Source package: [openssl]
Details (6)
- 3.5.6-1~deb13u2 · all · trixie
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.6-1~deb13u2 · all · trixie
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.6-1~deb13u2 · all · trixie-security · Historical version
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u2 · all · trixie-security
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u2 · all · trixie-security · Historical version
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u3 · all · trixie-security
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
[openssl]Fixed
Details (6)
- 3.5.6-1~deb13u2 · amd64 · trixie
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.6-1~deb13u2 · arm64 · trixie
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.6-1~deb13u2 · amd64 · trixie-security · Historical version
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u2 · amd64 · trixie-security · Historical version
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u2 · arm64 · trixie-security
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u3 · amd64 · trixie-security
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
[openssl-provider-fips]Fixed
Source package: [openssl]
Details (6)
- 3.5.6-1~deb13u2 · amd64 · trixie
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.6-1~deb13u2 · arm64 · trixie
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.6-1~deb13u2 · amd64 · trixie-security · Historical version
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u2 · amd64 · trixie-security · Historical version
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u2 · arm64 · trixie-security
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u3 · amd64 · trixie-security
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
[openssl-provider-legacy]Fixed
Source package: [openssl]
Details (6)
- 3.5.6-1~deb13u2 · amd64 · trixie
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.6-1~deb13u2 · arm64 · trixie
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.6-1~deb13u2 · amd64 · trixie-security · Historical version
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u2 · amd64 · trixie-security · Historical version
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u2 · arm64 · trixie-security
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13
- 3.5.7-1~deb13u3 · amd64 · trixie-security
  Fixed · Fixed: 3.5.6-1~deb13u2
  nvd · openssl · debian · 13

Observed: Oct 27, 2026, 7:15:12 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] · [Ubuntu Security Notices (USN)]