Vulnerability · Published Aug 17, 2026 · Assigned by VulnCheck

CVE-2026-74875openssl_encrypt before 1.4.0 Schema Validation Bypass

Critical 9.8

In plain English

A critical-severity insufficient verification of data authenticity in openssl_encrypt from jahlives. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)0.3%top 80.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

openssl_encrypt versions before 1.4.0 silently skip JSON schema validation when the jsonschema library is not installed, allowing malformed metadata to be accepted. Attackers can remove the jsonschema package or supply unknown metadata format versions to bypass all schema checks and process malicious data.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	openssl-encrypt	1.4.0	GHSA-425g-fjhq-5h92
PyPI	openssl-encrypt	1.4.0	PYSEC-2026-3755

Affected products (as reported)

Vendor	Product	Versions
jahlives	openssl_encrypt	0 – before 1.4.0

Weakness: CWE-345 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

GitHub Security Advisory (GHSA-425g-fjhq-5h92) vendor-advisory
VulnCheck Advisory: openssl_encrypt before 1.4.0 Schema Validation Bypass third-party-advisory