NIST deprecates RSA-2048 from 2030. Find every one of them before attackers do.
🐍
🐍 PyPI
Not in CISA KEV
HIGH severity

CVE-2023-48051 — upydev

HIGH

CVE-2023-48051 is a high-severity (CVSS 7.5) CWE-326 vulnerability in upydev. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

upydev has weak encryption padding

Also known asGHSA-qc4j-hrj6-cppfPYSEC-2023-302
Published
Updated
Affected
1 pkg
Patched
See advisory
Exploits
1 known
Exploitation data as of Nov 5, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.2%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs16th percentile — riskier than 16% of all scored CVEsHighest risk
0.00%0.25%0.50%0.75%0.1%0.2%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐍upydev

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.

Description

An issue in /upydev/keygen.py in upydev v0.4.3 allows attackers to decrypt sensitive information via weak encryption padding.

Affected Packages

1 total
EcosystemPackageVulnerable rangeFix
🐍PyPIupydevall versionsNo fix

Affected Products

1 product · 1 configurations
Application
upydevcarglglz
1 version
0.4.3
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

An issue in /upydev/keygen.py in upydev v0.4.3 allows attackers to decry…

github.comNVDNov 2023

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for upydev, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Remediation status

    The records we use list no patched version of upydev for CVE-2023-48051. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.

  3. Mitigate without a patch

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

An issue in /upydev/keygen.py in upydev v0.4.3 allows attackers to decrypt sensitive information via weak encryption padding.
O3 Security · Impact-Aware SCA

Is CVE-2023-48051 in your dependencies?

Find it across PyPI, including transitive dependencies.

Scan my dependencies How O3 SCA works
CVE-2023-48051: upydev (High 7.5)