CVE-2026-35549 Denial of service in MariaDB
A remote attacker can crash the MariaDB server by sending a large packet if the caching_sha2_password plugin is active, causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-35549?
CVE-2026-35549 is a medium-severity denial of service vulnerability in Mariadb Mariadb, published on 3 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-789
Which versions are affected by CVE-2026-35549?
3 open source packages ship an affected version, including mariadb, mariadb-min and mysql-client. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
mariadb Bitnami | All versions | 11.4.10, 11.8.6, 12.2.2 |
mariadb-min Bitnami | All versions | 11.4.10, 11.8.6, 12.2.2 |
mysql-client Bitnami | All versions | 11.4.10, 11.8.6, 12.2.2 |
Products include Mariadb Mariadb.
How do I fix CVE-2026-35549?
Upgrade mariadb to a fixed version for your release line: 11.4.10, 11.8.6 or 12.2.2.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-35549 being exploited?
There is no known exploitation of CVE-2026-35549 in the wild and no public exploit code.
Other vulnerabilities in Mariadb Mariadb
- CVE-2026-49261 MariaDB server has unsafe parameter handling in `wsrep_notify_cmd`
- CVE-2026-85746 MariaDB: Out-of-bound buffer write on in `ST_AsText` of nested GeometryCollections
- CVE-2026-85748 MariaDB: Use-after-free with a large number of SYS_REFCURSOR's
- CVE-2026-92262 MariaDB: Numerous issues caused by historical #mysql50# tablename encoding bypass.
- CVE-2023-26785 Code injection in n/a
Sources
Also known as BELL-CVE-2026-35549, BIT-mariadb-2026-35549, BIT-mariadb-min-2026-35549, BIT-mysql-client-2026-35549, DEBIAN-CVE-2026-35549, GHSA-3xgj-m9hf-j98g and 10 more.