Memory disclosure via malformed oidvector dimensions
Published Feb 12, 2026 · Updated Feb 12, 2026
Improper oidvector validation in PostgreSQL before 18.2, 17.8, 16.12, 15.16, and 14.21 allows remote authenticated users to read server memory. Cast pathways can create multidimensional or null-bearing oidvector values, while affected core functions trust a one-dimensional, null-free layout and expose bytes outside the intended array. A valid database account and crafted SQL are required; disclosure is limited to a few bytes, and confidential content is considered unlikely.
Summary
What happened
Improper oidvector validation in PostgreSQL before 18.2, 17.8, 16.12, 15.16, and 14.21 allows remote authenticated users to read server memory. Cast pathways can create multidimensional or null-bearing oidvector values, while affected core functions trust a one-dimensional, null-free layout and expose bytes outside the intended array. A valid database account and crafted SQL are required; disclosure is limited to a few bytes, and confidential content is considered unlikely.
The record
- CVE
- CVE-2026-2003
- Published
- Feb 12, 2026
- Updated
- Feb 12, 2026
- Vendor
- PostgreSQL Global Development Group
- Product
- PostgreSQL
- Classifications
- CWE-1287
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Feb 12, 2026CVE publishedPublication date reported by the CVE source.
- Feb 12, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <14.21
- Affected versionversion=15 <15.16
- Affected versionversion=16 <16.12
- Affected versionversion=17 <17.8
- Affected versionversion=18 <18.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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