Information Exposure Through an Error Message in python-cryptography - CVE-2026-69247
Published: August 1, 2026
Vulnerability identifier: #VU140695
CSH Severity: Medium
CVSS v4: 8.2 [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]
CVE-ID: CVE-2026-69247
CWE-ID: CWE-209
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to recover plaintext from PKCS#7 EnvelopedData messages.
The vulnerability exists due to generation of error message containing sensitive information and observable timing discrepancy in pkcs7_decrypt_der, pkcs7_decrypt_pem, and pkcs7_decrypt_smime when decrypting attacker-supplied EnvelopedData. A remote attacker can send crafted EnvelopedData messages and observe distinguishable errors and timing differences to recover plaintext from PKCS#7 EnvelopedData messages.
Exploitation requires a service that automatically decrypts untrusted EnvelopedData for the victim certificate and returns adaptive responses at high volume.
Affected software
python-cryptography
Fedora
IBM Security SOAR
python-pynitrokey
pyOpenSSL
python-cryptography
QRadar App SDK
Fedora
IBM Security SOAR
python-pynitrokey
pyOpenSSL
python-cryptography
QRadar App SDK
How to mitigate CVE-2026-69247
Install security update from vendor's website.
python-cryptography - update to 50.0.0
IBM Security SOAR - update to 51.0.11.0
python-pynitrokey - update to 0.12.3-4.fc44
QRadar App SDK - update to 2.2.7
pyOpenSSL - update to 26.4.0-2.fc44
python-cryptography - update to 50.0.0-1.fc44
IBM Security SOAR - update to 51.0.11.0
python-pynitrokey - update to 0.12.3-4.fc44
QRadar App SDK - update to 2.2.7
pyOpenSSL - update to 26.4.0-2.fc44
python-cryptography - update to 50.0.0-1.fc44