CVE-2026-35549: 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.
CSIRTS triage
- What
- A large packet can crash the server if the caching_sha2_password authentication plugin is installed and user accounts are configured to use it.
- Who is affected
- MariaDB Server deployments with caching_sha2_password authentication plugin enabled and affected user accounts.
- Urgency
- Medium severity (CVSS 6.5); denial of service via authenticated crash, not currently exploited.
- Action
- Upgrade to MariaDB Server 11.4.10, 11.8.6, or 12.2.2 or later.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-35549
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-355490.26% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 18% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-35549 | coverage & exploitation status | NVD · CVE.org |
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