CVE-2020-36242
CVSS v3
9.1
CRITICAL
EPSS Score
6.7 %
exploit probability, as of 2026-10-05
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
In the cryptography package before 3.3.2 for Python, certain sequences of update calls to symmetrically encrypt multi-GB values could result in an integer overflow and buffer overflow, as demonstrated by the Fernet class.
Technical details
- Published
- 2021-02-07
Frequently asked questions
What is CVE-2020-36242?
In the cryptography package before 3.3.2 for Python, certain sequences of update calls to symmetrically encrypt multi-GB values could result in an integer overflow and buffer overflow, as demonstrated by the Fernet class.
Is CVE-2020-36242 actively exploited?
Active exploitation of CVE-2020-36242 has not been confirmed. Its EPSS score was 6.7% on 2026-10-05, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2020-36242?
CVE-2020-36242 has a CVSS v3 base score of 9.1 (CRITICAL severity).
Is CVE-2020-36242 affecting your environment?
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