CVE-2026-4602 | jsrsasign up to 11.1.0 ext/jsbn2.js numeric conversion (SNYK-JS-JSRSASIGN-15371175)

VDB-352491 · CVE-2026-4602 · GCVE-0-2026-4602 JSRSASIGN UP TO 11.1.0 EXT/JSBN2.JS NUMERIC CONVERSION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.3 $0-$5k 2.88+ Summaryinfo A vulnerability classified as problematic has been found in jsrsasign up to 11.1.0. The impacted element is an unknown function of the file ext/jsbn2.js. Performing a manipulation results in numeric conversion. This vulnerability is identified as CVE-2026-4602. The attack can be initiated remotely. There is not any exploit available. It is recommended to upgrade the affected component. Detailsinfo A vulnerability was found in jsrsasign up to 11.1.0. It has been classified as problematic. This affects some unknown processing of the file ext/jsbn2.js. The manipulation with an unknown input leads to a numeric conversion vulnerability. CWE is classifying the issue as CWE-681. When converting from one data type to another, such as long to integer, data can be omitted or translated in a way that produces unexpected values. If the resulting values are used in a sensitive context, then dangerous behaviors may occur. This is going to have an impact on availability. The summary by CVE is: Versions of the package jsrsasign before 11.1.1 are vulnerable to Incorrect Conversion between Numeric Types due to handling negative exponents in ext/jsbn2.js. An attacker can force the computation of incorrect modular inverses and break signature verification by calling modPow with a negative exponent. It is possible to read the advisory at security.snyk.io. This vulnerability is uniquely identified as CVE-2026-4602 since 03/22/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. It is declared as proof-of-concept. Upgrading to version 11.1.1 eliminates this vulnerability. Productinfo Name jsrsasign Version 11.0 11.1.0 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: 6.4 VulDB Meta Temp Score: 6.3 VulDB Base Score: 5.3 VulDB Temp Score: 5.1 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 7.5 CNA Vector (snyk): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Numeric conversion CWE: CWE-681 / CWE-704 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Proof-of-Concept 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 03/23/2026 +0 days VulDB entry last update Sourcesinfo Advisory: SNYK-JS-JSRSASIGN-15371175 Status: Confirmed CVE: CVE-2026-4602 (🔒) GCVE (CVE): GCVE-0-2026-4602 GCVE (VulDB): GCVE-100-352491 Entryinfo Created: 03/23/2026 07:19 Changes: 03/23/2026 07:19 (76) Complete: 🔍 Cache ID: 99:8D4:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸