CVE-2026-39911 | hashgraph guardian up to 3.5.0 Environment Variable exposure of resource

VDB-356648 · CVE-2026-39911 · GCVE-0-2026-39911 HASHGRAPH GUARDIAN UP TO 3.5.0 ENVIRONMENT VARIABLE EXPOSURE OF RESOURCE HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 7.4 $0-$5k 0.47+ Summaryinfo A vulnerability described as critical has been identified in hashgraph guardian up to 3.5.0. The affected element is an unknown function of the component Environment Variable Handler. Such manipulation leads to exposure of resource. This vulnerability is listed as CVE-2026-39911. The attack may be performed from remote. There is no available exploit. Applying a patch is advised to resolve this issue. Detailsinfo A vulnerability was found in hashgraph guardian up to 3.5.0 and classified as critical. Affected by this issue is an unknown code block of the component Environment Variable Handler. The manipulation with an unknown input leads to a exposure of resource vulnerability. Using CWE to declare the problem leads to CWE-668. The product exposes a resource to the wrong control sphere, providing unintended actors with inappropriate access to the resource. Impacted is confidentiality, integrity, and availability. CVE summarizes: Hashgraph Guardian through version 3.5.0 contains an unsandboxed JavaScript execution vulnerability in the Custom Logic policy block worker that allows authenticated Standard Registry users to execute arbitrary code by passing user-supplied JavaScript expressions directly to the Node.js Function() constructor without isolation. Attackers can import native Node.js modules to read arbitrary files from the container filesystem, access process environment variables containing sensitive credentials such as RSA private keys, JWT signing keys, and API tokens, and forge valid authentication tokens for any user including administrators. The weakness was presented by Christ Bouchuen. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-39911 since 04/07/2026. The exploitation is known to be easy. The attack may be launched remotely. There are neither technical details nor an exploit publicly available. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. Productinfo Vendor hashgraph Name guardian Version 3.0 3.1 3.2 3.3 3.4 3.5.0 Website Product: https://github.com/hashgraph/guardian/ 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: 7.6 VulDB Meta Temp Score: 7.4 VulDB Base Score: 6.3 VulDB Temp Score: 6.0 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 8.8 CNA Vector (VulnCheck): 🔒 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: Exposure of resource CWE: CWE-668 / CWE-200 / CWE-284 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined 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: Patch Status: 🔍 0-Day Time: 🔒 Patch: github.com Timelineinfo 04/07/2026 CVE reserved 04/09/2026 +2 days Advisory disclosed 04/09/2026 +0 days VulDB entry created 04/09/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: github.com Researcher: Christ Bouchuen Status: Confirmed CVE: CVE-2026-39911 (🔒) GCVE (CVE): GCVE-0-2026-39911 GCVE (VulDB): GCVE-100-356648 Entryinfo Created: 04/09/2026 21:35 Changes: 04/09/2026 21:35 (76) Complete: 🔍 Cache ID: 99:6FD:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸