MariaDB server is a community developed fork of MySQL server. From 10.6.1 until 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, and 13.0.2, the qc_info plugin could be confused by a query containing embedded null bytes. Reading information_schema.query_cache_info after such a query was cached could access data beyond the end of a heap-allocated buffer, potentially disclosing adjacent memory or crashing the server. This issue is fixed in versions 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, and 13.0.2.
CVE-2026-107816
MEDIUMPre-NVD 6.46.4
EchelonGraph scoreLOW confidence
This medium-severity CVE scores 6.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: secondary
6.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: —CVSS: 6.4Exploit: None knownExposed services: Not assessed
A fix is available — apply it.
- CVSS v3
- 6.4
- EG Score
- 6.4MEDIUMlow confidence
- EG Risk
- 33EG Risk 33/100CISA SSVC
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity64% × 45%Exploitation0% × 40%Automatability30% × 15%CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high. - EPSS PROB
- —
- EPSS %ILE
- —
- KEV
- Not listed
CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table
Published
October 9, 2026
Last Modified
October 9, 2026
Advisory Details (9)
Auto-updated Oct 9, 2026Patch available. Sources: github, github_commit, github_release.
generic
[MDEV-40670] qc_info OOB read if query contains \0 - Jira
https://jira.mariadb.org/browse/MDEV-40670github_release Patch Available
MariaDB Community Server 13.0.2
Patch available: MariaDB/server mariadb-13.0.2
https://github.com/MariaDB/server/releases/tag/mariadb-13.0.2github_release Patch Available
MariaDB Community Server 12.3.3
Patch available: MariaDB/server mariadb-12.3.3
https://github.com/MariaDB/server/releases/tag/mariadb-12.3.3github_release Patch Available
MariaDB Community Server 11.8.9
Patch available: MariaDB/server mariadb-11.8.9
https://github.com/MariaDB/server/releases/tag/mariadb-11.8.9github_release Patch Available
MariaDB Community Server 11.4.13
Patch available: MariaDB/server mariadb-11.4.13
https://github.com/MariaDB/server/releases/tag/mariadb-11.4.13github_release Patch Available
MariaDB Community Server 10.6.28
Patch available: MariaDB/server mariadb-10.6.28
https://github.com/MariaDB/server/releases/tag/mariadb-10.6.28github_release Patch Available
MariaDB Community Server 10.11.19
Patch available: MariaDB/server mariadb-10.11.19
https://github.com/MariaDB/server/releases/tag/mariadb-10.11.19github_commit Patch Available
commit 0931994096b8 (MariaDB/server)
Patch available: MariaDB/server mariadb-10.6.28 (contains commit 0931994096b8)
https://github.com/MariaDB/server/commit/0931994096b84ecc9ffc8eb3517c7e09e6e8631egithubMentions a patch (unverified)
`qc_info` plugin can do OOB reads if query contains \0 · Advisory · MariaDB/server · GitHub
Affected: 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, 13.0.2.
https://github.com/MariaDB/server/security/advisories/GHSA-wfqg-88r5-55f6Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 3× in last 7d / 3× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-10-09 18:34 UTCEG score recompute
- 2026-10-09 17:34 UTCEG score recompute
- 2026-10-09 17:33 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Frequently asked(4)
What is CVE-2026-107816?
CVE-2026-107816 is a medium vulnerability published on October 9, 2026. MariaDB server is a community developed fork of MySQL server. From 10.6.1 until 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, and 13.0.2, the qcinfo plugin could be confused by a query containing embedded null bytes. Reading informationschema.querycacheinfo after such a query was cached could access…
When was CVE-2026-107816 disclosed?
CVE-2026-107816 was first published on October 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-107816?
CVE-2026-107816 has a CVSS base score of 6.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-107816?
A fix for CVE-2026-107816 is available: update to the fixed version the vendor names in its advisory.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-107816
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