CVE•Published 2026-04-08•Modified 2026-09-10•1 article on news•5 live references•NVD data

CVE-2026-39892Cryptography.io · Cryptography

Vulnerability data via NVD (ingested)

CVSS v3.1

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS percentile

Exploit Prediction Scoring System · top 51% of all CVEs

Weaknesses (CWE)

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer CWE-131Incorrect Calculation of Buffer Size

Description

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. From 45.0.0 to before 46.0.7, if a non-contiguous buffer was passed to APIs which accepted Python buffers (e.g. Hash.update()), this could lead to buffer overflows. This vulnerability is fixed in 46.0.7.

Timeline

Published 2026-04-08

Modified 2026-09-10

External references

NVD MITRE Exploit-DB trickest/cve VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-39892

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Cryptography.io Cryptography"

All exposed Cryptography.io Cryptography instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Cryptography"

HTTP body or banner mentions "Cryptography" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-39892