Home/CVE/Missing validation of multibyte character length in PostgreSQL text manipulation allows a database user to issue crafted
CVE

CVE-2026-2006

Missing validation of multibyte character length in PostgreSQL text manipulation allows a database user to issue crafted

Missing validation of multibyte character length in PostgreSQL text manipulation allows a database user to issue crafted queries that achieve a buffer overrun. That suffices to execute arbitrary code as the operating system user running the database. Versions before PostgreSQL 18.2, 17.8, 16.12, 15.16, and 14.21 are affected.

HIGH · CVSS 8.8 EPSS 0.00039
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-129Improper Validation of Array Index
▤

Affected Products & Versions

5
postgresql>= 14.0 and < 14.21
postgresql>= 15.0 and < 15.16
postgresql>= 16.0 and < 16.12
postgresql>= 17.0 and < 17.8
postgresql>= 18.0 and < 18.2
▣

Scoring & Timeline

8.8
HIGH · CVSS v3.1 · f86ef6dc-4d3a-42ad-8f28-e6d5547a5007
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD12 Feb 2026 · 02:16 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

30
suse-csafopenSUSE-SU-2026:20447-1
suse-csafSUSE-SU-2026:20983-1
suse-csafopenSUSE-SU-2026:20408-1
suse-csafSUSE-SU-2026:20921-1
suse-csafopenSUSE-SU-2026:20388-1
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://www.postgresql.org/support/security/CVE-2026-2006/Vendor Advisory
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