CVE-2026-34052 | jupyterhub ltiauthenticator up to 1.6.2 memory leak (GHSA-8mxq-7xr7-2fxj)

VDB-355272 · CVE-2026-34052 · GHSA-8MXQ-7XR7-2FXJ JUPYTERHUB LTIAUTHENTICATOR UP TO 1.6.2 MEMORY LEAK HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 4.7 $0-$5k 0.31+ Summaryinfo A vulnerability categorized as problematic has been discovered in jupyterhub ltiauthenticator up to 1.6.2. Impacted is an unknown function. The manipulation results in memory leak. This vulnerability is reported as CVE-2026-34052. The attack can be launched remotely. No exploit exists. It is advisable to upgrade the affected component. Detailsinfo A vulnerability was found in jupyterhub ltiauthenticator up to 1.6.2. It has been classified as problematic. Affected is an unknown functionality. The manipulation with an unknown input leads to a memory leak vulnerability. CWE is classifying the issue as CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. This is going to have an impact on availability. CVE summarizes: LTI JupyterHub Authenticator is a JupyterHub authenticator for LTI. Prior to version 1.6.3, the LTI 1.1 validator stores OAuth nonces in a class-level dictionary that grows without bounds. Nonces are added before signature validation, so an attacker with knowledge of a valid consumer key can send repeated requests with unique nonces to gradually exhaust server memory, causing a denial of service. This issue has been patched in version 1.6.3. The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-34052 since 03/25/2026. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1499. Upgrading to version 1.6.3 eliminates this vulnerability. The upgrade is hosted for download at github.com. Productinfo Vendor jupyterhub Name ltiauthenticator Version 1.6.0 1.6.1 1.6.2 Website Product: https://github.com/jupyterhub/ltiauthenticator/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 4.8 VulDB Meta Temp Score: 4.7 VulDB Base Score: 3.7 VulDB Temp Score: 3.6 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 5.9 CNA Vector (GitHub_M): 🔒 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: Memory leak CWE: CWE-401 / CWE-404 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: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: ltiauthenticator 1.6.3 Timelineinfo 03/25/2026 CVE reserved 04/04/2026 +9 days Advisory disclosed 04/04/2026 +0 days VulDB entry created 04/04/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: GHSA-8mxq-7xr7-2fxj Status: Confirmed CVE: CVE-2026-34052 (🔒) GCVE (CVE): GCVE-0-2026-34052 GCVE (VulDB): GCVE-100-355272 Entryinfo Created: 04/04/2026 08:09 Changes: 04/04/2026 08:09 (65) Complete: 🔍 Cache ID: 99:555:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸