Answer in brief
CVE-2026-34073 records a Low severity (CVSS 1.7) vulnerability in cryptography has incomplete DNS name constraint enforcement on peer names. The current sources do not mark it as known exploited. The current feed maps pyca/cryptography (generic), cryptography (pip), cryptography (pypi). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 1.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps pyca/cryptography (generic), cryptography (pip), cryptography (pypi). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:a:cryptography.io:cryptography:*:*:*:*:*:python:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| pyca/cryptographygeneric | <46.0.6 | 46.0.6 |
| cryptographypip | <46.0.6 | 46.0.6 |
| cryptographypypi | >=0 <46.0.6 | 46.0.6 |
Published upstream
Mar 31, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 11, 2026
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.
Quoted source text, attributed separately from HOL analysis.