jahlives openssl_encrypt up to 1.3.x KEM decapsulation pqc.py risky encryption

CVSS Meta Temp Score
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CTI Interest Score
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6.7$0-$5k0.21+

Summaryinfo

A vulnerability labeled as problematic has been found in jahlives openssl_encrypt up to 1.3.x. The affected element is an unknown function of the file pqc.py of the component KEM decapsulation. The manipulation results in risky encryption. This vulnerability is cataloged as CVE-2026-74900. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in jahlives openssl_encrypt up to 1.3.x. It has been classified as problematic. Affected is an unknown part of the file pqc.py of the component KEM decapsulation. The manipulation with an unknown input leads to a risky encryption vulnerability. CWE is classifying the issue as CWE-327. The product uses a broken or risky cryptographic algorithm or protocol. This is going to have an impact on confidentiality. CVE summarizes:

openssl_encrypt versions before 1.4.0 contain a critical vulnerability in pqc.py where KEM decapsulation failures silently fall back to simulation mode, generating a deterministic shared secret from only 16 bytes of the private key and publicly available encapsulated key data. Attackers who obtain 16 bytes of the private key can compute the shared secret and decrypt all ciphertext, as the fallback triggers on any KEM failure without raising an error.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-74900 since 08/17/2026. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1600 by the MITRE ATT&CK project.

Upgrading to version 1.4.0 eliminates this vulnerability.

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Productinfo

Type

Vendor

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 6.7
VulDB Meta Temp Score: 6.7

VulDB Base Score: 3.7
VulDB Temp Score: 3.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 9.8
CNA Vector (VulnCheck): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Risky encryption
CWE: CWE-327 / CWE-310
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: openssl_encrypt 1.4.0

Timelineinfo

08/17/2026 Advisory disclosed
08/17/2026 +0 days CVE reserved
08/17/2026 +0 days VulDB entry created
08/17/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-74900 (🔒)
GCVE (CVE): GCVE-0-2026-74900
GCVE (VulDB): GCVE-100-391254

Entryinfo

Created: 08/17/2026 13:40
Changes: 08/17/2026 13:40 (78)
Complete: 🔍
Cache ID: 216::103

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