Input validation error in OpenSSL - CVE-2026-34182

Vulnerability identifier: #VU134271

CSH Severity: High

CVSS v4: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-34182

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to bypass integrity validation.

The vulnerability exists due to improper input validation in CMS AuthEnvelopedData processing when decrypting crafted AuthEnvelopedData containers. A remote attacker can send a specially crafted CMS message to bypass integrity validation.

In some cases, if the application exposes decryption success or failure, the issue can be used as an oracle to obtain key-equivalent functionality for the content-encryption key.

OpenSSL
SUSE Linux Enterprise Server 15 SP5
Debian Linux
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Micro for Rancher
SUSE Linux Enterprise Micro
IBM i
Fedora
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for ARM 64
FreeBSD
Ubuntu
Web and Scripting Module
Basesystem Module
openSUSE Leap
Anolis OS
openEuler
IBM Cloud Pak for Data System
IBM MQ Operator
Netezza Appliance
IBM supplied MQ Advanced container images
Operator for PostgreSQL
LANTIME Operating System Firmware (LTOS)
openssl (Ubuntu package)
libopenssl3-64bit
libopenssl3-64bit-debuginfo
libopenssl-3-devel-64bit
libopenssl-3-devel
openssl-3
openssl-3-debuginfo
openssl-3-debugsource
libopenssl3
libopenssl3-debuginfo
libopenssl3-32bit
openssl-3-doc
libopenssl-3-devel-32bit
libopenssl3-32bit-debuginfo
openssl
openssl-doc
openssl-perl
openssl-libs
openssl-devel
openssl-help
openssl-debugsource
openssl-debuginfo
openssl (Debian package)
libopenssl-3-fips-provider-64bit
libopenssl-3-fips-provider-64bit-debuginfo
libopenssl-3-fips-provider-32bit
libopenssl-3-fips-provider-32bit-debuginfo
libopenssl-3-fips-provider-debuginfo
libopenssl-3-fips-provider
libopenssl-fips-provider
libopenssl-devel
openssl (Red Hat package)
openssl3
nodejs24-devel
nodejs24-debugsource
nodejs24
npm24
nodejs24-debuginfo
nodejs24-docs
edk2-debugsource
edk2
edk2-debuginfo
edk2-devel
edk2-aarch64
edk2-help
edk2-ovmf
python3-edk2-devel
EntireX

Install security update from vendor's website.

OpenSSL - addressed in versions 3.0.21, 3.4.6, 3.5.7, 3.6.3, 4.0.1
IBM Cloud Pak for Data System - update to 8.10.26.07.SP3
Netezza Appliance - update to 1.0.2.0
IBM MQ Operator - addressed in versions 3.2.26 SC2, 4.0.1 SC2
LANTIME Operating System Firmware (LTOS) - update to 7.10.013
IBM supplied MQ Advanced container images - update to 10.0.0.0-r2
openssl (Ubuntu package) - addressed in versions 1.0.1f-1ubuntu2.27+esm14, 1.0.2g-1ubuntu4.20+esm16, 1.0.2n-1ubuntu5.13+esm5, 1.1.1f-1ubuntu2.24+esm4, 1.1.1-1ubuntu2.1~18.04.23+esm9, 3.0.2-0ubuntu1.25, 3.0.13-0ubuntu3.11, 3.5.3-1ubuntu3.4, 3.5.5-1ubuntu3.2
libopenssl3-64bit - addressed in versions 3.0.8-150400.4.90.1, 3.0.8-150500.5.69.1, 3.1.4-150600.5.53.1
libopenssl3-64bit-debuginfo - addressed in versions 3.0.8-150400.4.90.1, 3.0.8-150500.5.69.1, 3.1.4-150600.5.53.1
libopenssl-3-devel-64bit - addressed in versions 3.0.8-150400.4.90.1, 3.0.8-150500.5.69.1, 3.1.4-150600.5.53.1
libopenssl-3-devel - addressed in versions 3.0.8-150400.4.90.1, 3.0.8-150500.5.69.1, 3.1.4-150600.5.53.1, 3.5.0-150700.5.45.2
openssl-3 - addressed in versions 3.0.8-150400.4.90.1, 3.0.8-150500.5.69.1, 3.1.4-150600.5.53.1, 3.5.0-150700.5.45.2
openssl-3-debuginfo - addressed in versions 3.0.8-150400.4.90.1, 3.0.8-150500.5.69.1, 3.1.4-150600.5.53.1, 3.5.0-150700.5.45.2
openssl-3-debugsource - addressed in versions 3.0.8-150400.4.90.1, 3.0.8-150500.5.69.1, 3.1.4-150600.5.53.1, 3.5.0-150700.5.45.2
libopenssl3 - addressed in versions 3.0.8-150400.4.90.1, 3.0.8-150500.5.69.1, 3.1.4-150600.5.53.1, 3.5.0-150700.5.45.2
libopenssl3-debuginfo - addressed in versions 3.0.8-150400.4.90.1, 3.0.8-150500.5.69.1, 3.1.4-150600.5.53.1, 3.5.0-150700.5.45.2
libopenssl3-32bit - addressed in versions 3.0.8-150400.4.90.1, 3.0.8-150500.5.69.1, 3.1.4-150600.5.53.1, 3.5.0-150700.5.45.2
openssl-3-doc - addressed in versions 3.0.8-150400.4.90.1, 3.0.8-150500.5.69.1, 3.1.4-150600.5.53.1
libopenssl-3-devel-32bit - addressed in versions 3.0.8-150400.4.90.1, 3.0.8-150500.5.69.1, 3.1.4-150600.5.53.1
libopenssl3-32bit-debuginfo - addressed in versions 3.0.8-150400.4.90.1, 3.0.8-150500.5.69.1, 3.1.4-150600.5.53.1, 3.5.0-150700.5.45.2
openssl - update to 3.0.12-26
openssl-doc - update to 3.0.12-26
openssl-perl - update to 3.0.12-26
openssl-libs - update to 3.0.12-26
openssl-devel - update to 3.0.12-26
openssl-help - update to 3.0.12-52
openssl-perl - update to 3.0.12-52
openssl - update to 3.0.12-52
openssl-libs - update to 3.0.12-52
openssl-devel - update to 3.0.12-52
openssl-debugsource - update to 3.0.12-52
openssl-debuginfo - update to 3.0.12-52
openssl (Debian package) - addressed in versions 3.0.20-1~deb12u2, 3.5.6-1~deb13u2
libopenssl-3-fips-provider-64bit - update to 3.1.4-150600.5.53.1
libopenssl-3-fips-provider-64bit-debuginfo - update to 3.1.4-150600.5.53.1
libopenssl-3-fips-provider-32bit - addressed in versions 3.1.4-150600.5.53.1, 3.5.0-150700.5.45.2
libopenssl-3-fips-provider-32bit-debuginfo - addressed in versions 3.1.4-150600.5.53.1, 3.5.0-150700.5.45.2
libopenssl-3-fips-provider-debuginfo - addressed in versions 3.1.4-150600.5.53.1, 3.5.0-150700.5.45.2
libopenssl-3-fips-provider - addressed in versions 3.1.4-150600.5.53.1, 3.5.0-150700.5.45.2
libopenssl-fips-provider - update to 3.5.0-150700.3.4.1
libopenssl-devel - update to 3.5.0-150700.3.4.1
openssl - update to 3.5.0-150700.3.4.1
openssl (Red Hat package) - addressed in versions 3.5.5-4.el9_8, 3.5.5-4.el10_2
openssl3 - update to 3.5.5-5.el8
openssl - update to 3.5.7-1.fc44
EntireX - update to 11.1 Fix6
nodejs24-devel - update to 24.18.1-150700.15.18.1
nodejs24-debugsource - update to 24.18.1-150700.15.18.1
nodejs24 - update to 24.18.1-150700.15.18.1
npm24 - update to 24.18.1-150700.15.18.1
nodejs24-debuginfo - update to 24.18.1-150700.15.18.1
nodejs24-docs - update to 24.18.1-150700.15.18.1
edk2-debugsource - addressed in versions 202308-37, 202308-41
edk2 - addressed in versions 202308-37, 202308-41
edk2-debuginfo - addressed in versions 202308-37, 202308-41
edk2-devel - addressed in versions 202308-37, 202308-41
edk2-aarch64 - addressed in versions 202308-37, 202308-41
edk2-help - addressed in versions 202308-37, 202308-41
edk2-ovmf - addressed in versions 202308-37, 202308-41
python3-edk2-devel - addressed in versions 202308-37, 202308-41

• https://openssl-library.org/news/secadv/20260609.txt

• Multiple vulnerabilities in OpenSSL
• Debian update for openssl
• Ubuntu update for openssl
• Ubuntu update for openssl
• Fedora 44 update for openssl
• Red Hat Enterprise Linux 10 update for openssl
• Red Hat Enterprise Linux 9 update for openssl
• FreeBSd update for OpenSSL
• SUSE update for openssl-3
• openEuler 24.03 LTS SP3 update for openssl
• openEuler 24.03 LTS SP1 update for openssl
• openEuler 24.03 LTS SP3 update for edk2
• openEuler 24.03 LTS SP1 update for edk2
• Anolis OS update for openssl
• Multiple vulnerabilities in IBM Operator for PostgreSQL
• Multiple vulnerabilities in IBM EntireX
• Multiple vulnerabilities in IBM MQ Operator and Queue manager container images
• Multiple vulnerabilities in IBM i
• SUSE update for openssl-3
• SUSE update for openssl-3
• Fedora EPEL 8 update for openssl3
• Multiple vulnerabilities in Meinberg LANTIME firmware
• SUSE update for openssl, openssl-3
• Multiple vulnerabilities in IBM Cloud Pak for Data System
• IBM Netezza Appliance update for OpenSSL