CyberSecBulletin
CVE-2026-107821NVD status: Analyzed

server: Improper Validation of Specified Index, Position, or Offset in Input

Published Updated By the CyberSecBulletin desk

CVE-2026-107821 is a high-severity improper validation of specified index, position, or offset in input vulnerability in server from MariaDB, with a CVSS 3.1 base score of 8.0 out of 10. It can be exploited remotely over the network by an attacker with administrator privileges, without any action from a user. Affected server versions: >= 10.6.1, < 10.6.28; >= 10.11.1, < 10.11.19; >= 11.4.1, < 11.4.13, and others listed below. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 1.2% chance of exploitation within 30 days, higher than 69% of scored CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update Mariadb to 10.6.28 or 10.11.19 or 11.4.13 or 11.8.9, whichever matches your release line, or a later version.
  2. Read the advisory on github.com for workarounds and exact fixed builds.

Affected products and versions

VendorProductAffected versionsFixed in
MariaDBserver>= 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, < 13.0.2Not stated
MariaDBMariadb10.6.1 up to, but not including, 10.6.28; 10.11.1 up to, but not including, 10.11.19; 11.4.1 up to, but not including, 11.4.13; 11.8.1 up to, but not including, 11.8.9; 12.3.1 up to, but not including, 12.3.3; 13.0.1 up to, but not including, 13.0.210.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, 13.0.2

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
HighSuccess depends on conditions outside the attacker's control.
Privileges required
HighAdministrator-level access is required first.
User interaction
NoneNo action by a victim is required.
Scope
ChangedThe attack can reach beyond the vulnerable component into other systems.
Confidentiality
HighAll data handled by the component can be read.
Integrity
HighData or code can be modified at will.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H. Scored by CNA (github.com).

Official 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, MariaDB insufficiently validated counts, offsets, lengths, and field boundaries in FRM metadata while opening binary FRM files. An attacker able to place a crafted FRM file in the data directory could trigger out-of-bounds reads or writes, crash the server, or potentially execute code. 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.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Improper Validation of Specified Index, Position, or Offset in Input

The product receives input that is expected to specify an index, position, or offset into an indexable resource such as a buffer or file, but it does not validate or incorrectly validates that the specified index/position/offset has the required properties.

More Improper Validation of Specified Index, Position, or Offset in Input vulnerabilities (CWE-1285)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Other references

Other vulnerabilities in server

All server vulnerabilities

Recent Improper Validation of Specified Index, Position, or Offset in Input vulnerabilities

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