9.9

CVE-2026-85746: mariadb server Out-of-bounds Write

CVSS: 9.9v3.1CriticalAwaiting analysis
AliasesDEBIAN-CVE-2026-85746
Published 16-10-2026Last modified 16-10-2026
Open JSON

Vulnerability summary

CVE-2026-85746 is a critical (CVSS 9.9) Out-of-bounds Write vulnerability in mariadb server. EPSS estimates a 0.63% chance of exploitation in the next 30 days, higher than 49% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.9/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.63%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 16-10-2026
    PublishedVulnerability first disclosed.
  2. 16-10-2026
    Last modifiedVulnerability information updated.

Description

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, ST_AsText can write beyond an allocated output buffer when converting deeply nested GeometryCollections because recursive WKT serialization does not account for bytes consumed or reserve sufficient space. A low-privileged remote attacker can submit a specially crafted GIS object to corrupt memory and potentially achieve code execution when combined with another vulnerability. 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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.63%

Chance of exploitation in the next 30 days

Percentile

49%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

17-10-202619-10-2026
EPSS score
0.63%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • mariadbAll versions (No fix recorded) | < 1:11.8.9+ds-1
Mariadb1 product
  • server≥ 10.6.1, < 10.6.28 | ≥ 10.11.1, < 10.11.19 | ≥ 11.4.1, < 11.4.13 | ≥ 11.8.1, < 11.8.9 | ≥ 12.3.1, < 12.3.3 | ≥ 13.0.1, < 13.0.2

2 vendors · 2 products

References

10 links