CVE-2026-35549 | MariaDB up to 11.4.9/11.8.5/12.2.1 Authentication Plugin caching_sha2_password memory allocation

VDB-355065 · CVE-2026-35549 · GCVE-0-2026-35549 MARIADB UP TO 11.4.9/11.8.5/12.2.1 AUTHENTICATION PLUGIN CACHING_SHA2_PASSWORD MEMORY ALLOCATION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 5.3 $0-$5k 1.32+ Summaryinfo A vulnerability marked as problematic has been reported in MariaDB up to 11.4.9/11.8.5/12.2.1. The impacted element is the function caching_sha2_password of the component Authentication Plugin. Performing a manipulation results in memory allocation. This vulnerability is known as CVE-2026-35549. Remote exploitation of the attack is possible. No exploit is available. It is suggested to upgrade the affected component. Detailsinfo A vulnerability was found in MariaDB up to 11.4.9/11.8.5/12.2.1. It has been classified as problematic. This affects the function caching_sha2_password of the component Authentication Plugin. The manipulation with an unknown input leads to a memory allocation vulnerability. CWE is classifying the issue as CWE-789. The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated. This is going to have an impact on availability. The summary by CVE is: An issue was discovered in MariaDB Server before 11.4.10, 11.5.x through 11.8.x before 11.8.6, and 12.x before 12.2.2. If the caching_sha2_password authentication plugin is installed, and some user accounts are configured to use it, a large packet can crash the server because sha256_crypt_r uses alloca. The advisory is shared at jira.mariadb.org. This vulnerability is uniquely identified as CVE-2026-35549 since 04/03/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details are known, but no exploit is available. Upgrading to version 11.4.10, 11.8.6 or 12.2.2 eliminates this vulnerability. Productinfo Type Database Software Name MariaDB Version 11.4.0 11.4.1 11.4.2 11.4.3 11.4.4 11.4.5 11.4.6 11.4.7 11.4.8 11.4.9 11.8.0 11.8.1 11.8.2 11.8.3 11.8.4 11.8.5 12.2.0 12.2.1 License open-source CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 5.4 VulDB Meta Temp Score: 5.3 VulDB Base Score: 4.3 VulDB Temp Score: 4.1 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 6.5 CNA Vector (MITRE): 🔒 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 allocation CWE: CWE-789 / CWE-400 / 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: MariaDB 11.4.10/11.8.6/12.2.2 Timelineinfo 04/03/2026 Advisory disclosed 04/03/2026 +0 days CVE reserved 04/03/2026 +0 days VulDB entry created 04/03/2026 +0 days VulDB entry last update Sourcesinfo Advisory: jira.mariadb.org Status: Confirmed CVE: CVE-2026-35549 (🔒) GCVE (CVE): GCVE-0-2026-35549 GCVE (VulDB): GCVE-100-355065 Entryinfo Created: 04/03/2026 07:49 Changes: 04/03/2026 07:49 (65) Complete: 🔍 Cache ID: 99:C65:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸