What is CVE-2023-52323?

CVE-2023-52323 is a medium-severity vulnerability in Pycryptodome, classified under Observable Discrepancy. CVSS score: 5.9/10. Published 2024-01-05.

How severe is CVE-2023-52323?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Vulnerability in Pycryptodome

CVE-2023-52323

PyCryptodome and pycryptodomex before 3.19.1 allow side-channel leakage for OAEP decryption, exploitable for a Manger attack.

Published 2024-01-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.006 (47.6th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 47.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-203 — Observable Discrepancy

References

github.com/Legrandin/pycryptodome/blob/master/Changelog.rst (Release Notes)
pypi.org/project/pycryptodomex/ (Release Notes)

Frequently asked questions

What is CVE-2023-52323?: CVE-2023-52323 is a medium-severity vulnerability in Pycryptodome, classified under Observable Discrepancy. CVSS score: 5.9/10. Published 2024-01-05.
How severe is CVE-2023-52323?: Medium severity. CVSS v3 base score is 5.9 out of 10.