python-cryptography 3.2 is vulnerable to Bleichenbacher timing attacks in the RSA decryption API, via timed processing of valid PKCS#1 v1.5 ciphertext.
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This medium-severity CVE scores 5.9 under NVD CVSS v3. EPSS exploit probability: 0.8%, top 26% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
python-cryptography 3.2 is vulnerable to Bleichenbacher timing attacks in the RSA decryption API, via timed processing of valid PKCS#1 v1.5 ciphertext.
January 11, 2021
November 21, 2024
| Vendor / Ecosystem | Fixed in / Patch | Released | Source |
|---|---|---|---|
| ubuntu | python3-cryptography (1.2.3-1ubuntu0.3) @ xenial | 2026-05-26 | ubuntu |
| redhat | rh-python38-python-urllib3-0:1.25.7-7.el7 | 2021-08-24 | redhat |
| redhat | redhat-virtualization-host-0:4.4.6-20210527.3.el8_4 | 2021-06-03 | redhat |
| redhat | python-cryptography-0:3.2.1-4.el8 | 2021-05-18 | redhat |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| cryptography | 0.1 ... 3.2 (80 versions) | 3.2.1 | — |
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.
python-cryptography 3.2 is vulnerable to Bleichenbacher timing attacks in the RSA decryption API via timed processing of valid PKCS#1 v1.5 ciphertext.
RHSA-2021:1608 — Moderate
RHSA-2021:2239 — Moderate
RHSA-2021:3254 — Moderate
python-cryptography vulnerability
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msrc · redhat · ubuntu
CWE-385