VDB-352487 · CVE-2026-4599 · EUVD-2026-14373

jsrsasign up to 11.1.0 Private Key src/crypto-1.1.js incomplete comparison with missing factors

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
8.0	$0-$5k	0.00

Summaryinfo

A vulnerability identified as critical has been detected in jsrsasign up to 11.1.0. This vulnerability affects the function getRandomBigIntegerZeroToMax/getRandomBigIntegerMinToMax of the file src/crypto-1.1.js of the component Private Key Handler. The manipulation leads to incomplete comparison with missing factors. This vulnerability is uniquely identified as CVE-2026-4599. The attack is possible to be carried out remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in jsrsasign up to 11.1.0. This issue affects the function getRandomBigIntegerZeroToMax/getRandomBigIntegerMinToMax of the file src/crypto-1.1.js of the component Private Key Handler. The manipulation with an unknown input leads to a incomplete comparison with missing factors vulnerability. Using CWE to declare the problem leads to CWE-1023. The product performs a comparison between entities that must consider multiple factors or characteristics of each entity, but the comparison does not include one or more of these factors. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Versions of the package jsrsasign from 7.0.0 and before 11.1.1 are vulnerable to Incomplete Comparison with Missing Factors via the getRandomBigIntegerZeroToMax and getRandomBigIntegerMinToMax functions in src/crypto-1.1.js; an attacker can recover the private key by exploiting the incorrect compareTo checks that accept out-of-range candidates and thus bias DSA nonces during signature generation.

It is possible to read the advisory at security.snyk.io. The identification of this vulnerability is CVE-2026-4599 since 03/22/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 11.1.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-14373). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

jsrsasign

Version

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: 8.2
VulDB Meta Temp Score: 8.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 9.1
CNA Vector (snyk): 🔒

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Incomplete comparison with missing factors
CWE: CWE-1023
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: jsrsasign 11.1.1

Timelineinfo

03/22/2026 CVE reserved
03/23/2026 +1 days Advisory disclosed
03/23/2026 +0 days VulDB entry created
06/22/2026 +91 days VulDB entry last update

Sourcesinfo

Advisory: SNYK-JS-JSRSASIGN-15370939
Status: Confirmed

CVE: CVE-2026-4599 (🔒)
GCVE (CVE): GCVE-0-2026-4599
GCVE (VulDB): GCVE-100-352487
EUVD: 🔒

Entryinfo

Created: 03/23/2026 07:15
Updated: 06/22/2026 15:44
Changes: 03/23/2026 07:15 (77), 03/23/2026 11:36 (1), 06/22/2026 15:44 (1)
Complete: 🔍
Cache ID: 216::103