CVE-2023-50782 | Python-cryptography: bleichenbacher timing oracle attack against rsa decryption - incomplete fix for cve-2020-25659

A flaw was found in the python-cryptography package. This issue may allow a remote attacker to decrypt captured messages in TLS servers that use RSA key exchanges, which may lead to exposure of confidential or sensitive data.

Published: 2024-02-05 Last update: 2026-03-24 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-50782 is rated Moderate Risk (55.9/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.85%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2023-50782

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-03-24 1.15% 0.85% -0.29%
2 2026-02-26 0.85% 1.15% +0.29%
3 2026-02-23 — 0.85% —

Full EPSS history (13 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-50782

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]

Weakness enumeration for CVE-2023-50782

GitHub Security Advisory for CVE-2023-50782

GHSA-3ww4-gg4f-jr7f · Severity: high · Ecosystem: pip — Python Cryptography package vulnerable to Bleichenbacher timing oracle attack

OS Trackers for CVE-2023-50782

vendor priority summary link
debian not yet assigned CVE-2023-50782 not yet assigned priority: Debian including 1 source packages (python-cryptography), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 3, open 2. https://security-tracker.debian.org/tracker/CVE-2023-50782
redhat medium — https://access.redhat.com/security/cve/CVE-2023-50782
suse medium CVE-2023-50782 severity moderate: SUSE including 588 source package names (0.0.17-1.1:libopenssl1_1-1.1.1w-150600.5.9.1, 0.0.17-1.1:libopenssl3-3.1.4-150600.5.21.1, …), 1668 product×package rows across 431 product lines (Container bci/bci-init, Container bci/bci-sle15-kernel-module-devel, … (431 product lines)): Fixed 1146, Known Affected 221, Known Not Affected 180, Will Not Fix 121. https://www.suse.com/security/cve/CVE-2023-50782/
ubuntu medium CVE-2023-50782 medium priority: Ubuntu including 1 source packages (python-cryptography), 9 status rows across 9 suites (bionic, focal, jammy, lunar, mantic, noble, trusty, upstream, xenial): released 6, ignored 2, not-affected 1. https://ubuntu.com/security/CVE-2023-50782

Affected software / configurations for CVE-2023-50782

Vendor Product Version Raw CPE
redhat ansible_automation_platform 2.0 cpe:2.3:a:redhat:ansible_automation_platform:2.0:*:*:*:*:*:*:*
redhat enterprise_linux 8.0 cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
redhat enterprise_linux 9.0 cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
redhat update_infrastructure 4 cpe:2.3:a:redhat:update_infrastructure:4:*:*:*:*:*:*:*
cryptography.io cryptography < 42.0.0 cpe:2.3:a:cryptography.io:cryptography:*:*:*:*:*:python:*:*
couchbase couchbase_server 7.6.0 cpe:2.3:a:couchbase:couchbase_server:7.6.0:*:*:*:*:*:*:*
couchbase couchbase_server 7.6.1 cpe:2.3:a:couchbase:couchbase_server:7.6.1:*:*:*:*:*:*:*

References for CVE-2023-50782

cvelogic Threat Intelligence