CVE-2026-34073
Last modified
CVE-2026-34073 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Prior to version 46.0.6, DNS name constraints were only validated against SANs within child certificates, and not the "peer name" presented during each validation. EPSS estimates a 0.15% chance of exploitation in the next 30 days.
Description
cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Prior to version 46.0.6, DNS name constraints were only validated against SANs within child certificates, and not the "peer name" presented during each validation. Consequently, cryptography would allow a peer named bar.example.com to validate against a wildcard leaf certificate for *.example.com, even if the leaf's parent certificate (or upwards) contained an excluded subtree constraint for bar.example.com. This issue has been patched in version 46.0.6.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Cryptography.Io | Cryptography | < 46.0.6 |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-34073?
How severe is CVE-2026-34073?
How do I fix CVE-2026-34073?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-34068nimiq-transaction provides the transaction primitive to be u…6.8
- CVE-2026-34069nimiq/core-rs-albatross is a Rust implementation of the Nimi…5.3
- CVE-2026-3407A vulnerability was determined in YosysHQ yosys up to 0.62. …3.3
- CVE-2026-34070LangChain is a framework for building agents and LLM-powered…7.5
- CVE-2026-34071Stirling-PDF is a locally hosted web application that allows…6.1
- CVE-2026-34072Cr*nMaster (cronmaster) is a Cronjob management UI with huma…9.8
- CVE-2026-34076Clerk JavaScript is the official JavaScript repository for C…7.4
- CVE-2026-34077React Router is a router for React. In versions 7.7.0 throug…7.5
- CVE-2026-34078Flatpak is a Linux application sandboxing and distribution f…10
- CVE-2026-34079Flatpak is a Linux application sandboxing and distribution f…7.5
- CVE-2026-3408A vulnerability was identified in Open Babel up to 3.1.1. Th…6.5
- CVE-2026-34080xdg-dbus-proxy is a filtering proxy for D-Bus connections. P…5.5
Are you affected by CVE-2026-34073?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST