Resource exhaustion in python-cryptography - CVE-2026-69249

Vulnerability identifier: #VU140696

CSH Severity: Medium

CVSS v4: 8.7 [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]

CVE-ID: CVE-2026-69249

CWE-ID: CWE-400

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to uncontrolled resource consumption in the certificate chain path-building logic when processing invalid certificate chains containing duplicate self-signed certificates. A remote attacker can supply a crafted certificate chain to cause a denial of service.

The issue affects availability only; certificate validation correctness is not affected.

python-cryptography
Maximo Application Suite - Edge Data Collector
QRadar App SDK
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Ubuntu
Anolis OS
openEuler
IBM Security SOAR
python-cryptography-debuginfo
python-cryptography-help
python3-cryptography
python-cryptography-debugsource
python-cryptography
python-cryptography (Red Hat package)
python3.14-cryptography (Red Hat package)
python-cryptography (Ubuntu package)

Install security update from vendor's website.

python-cryptography - update to 49.0.0
Maximo Application Suite - Edge Data Collector - addressed in versions 9.0.25, 9.1.15, 9.2.4
IBM Security SOAR - update to 51.0.11.0
python-cryptography-debuginfo - update to 42.0.2-10
python-cryptography-help - update to 42.0.2-10
python3-cryptography - update to 42.0.2-10
python-cryptography-debugsource - update to 42.0.2-10
python-cryptography - update to 42.0.2-10
python3-cryptography - update to 42.0.5-4
python-cryptography (Red Hat package) - addressed in versions 43.0.0-4.el10_0.1, 43.0.0-4.el10_2.5
python3.14-cryptography (Red Hat package) - addressed in versions 45.0.4-4.el9_8.6, 45.0.4-4.el10_2.5
QRadar App SDK - update to 2.2.7
python-cryptography (Ubuntu package) - addressed in versions 2.1.4-1ubuntu1.4+esm6, 46.0.5-1ubuntu2.2

• https://github.com/pyca/cryptography/security/advisories/GHSA-jwv3-5hgf-82ww

• Multiple vulnerabilities in python-cryptography
• openEuler 24.03 LTS SP1 update for python-cryptography
• openEuler 24.03 LTS SP4 update for python-cryptography
• openEuler 24.03 LTS SP3 update for python-cryptography
• Multiple vulnerabilities in IBM Security SOAR
• Red Hat Enterprise Linux 9 update for python3.14-cryptography
• Red Hat Enterprise Linux 10 update for python3.14-cryptography
• Red Hat Enterprise Linux 10 update for python-cryptography
• Red Hat Enterprise Linux 10 update for python-cryptography
• Multiple vulnerabilities in IBM QRadar App SDK
• Multiple vulnerabilities in IBM Edge Data Collector
• Ubuntu update for python-cryptography
• Anolis OS update for python-cryptography