CVE-2026-18024: Buffer Over-read in PostgreSQL
Buffer over-read in PostgreSQL ascii() SQL function allows a user to disclose up to 3 bytes after the end of a specific allocation, via a crafted text value. This is the same class of defect that CVE-2026-2006 fixed, though this instance has less impact. Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected.
AI Analysis
Technical Summary
This vulnerability involves a buffer over-read in the ascii() function of PostgreSQL, which can disclose up to 3 bytes of memory beyond the intended allocation when processing a crafted input string. It affects PostgreSQL versions earlier than 14.24, 15.19, 16.15, 17.11, and 18.5. The flaw is a lesser-impact variant of a previously addressed issue (CVE-2026-2006). The vulnerability requires low privileges to exploit and does not impact integrity or availability, only confidentiality to a limited extent.
Potential Impact
An attacker with limited privileges can cause the ascii() function to read and disclose up to 3 bytes of memory beyond the allocated buffer. This could lead to minor information disclosure but does not affect data integrity or system availability. The impact is limited in scope and severity.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided in the current data. Users should monitor PostgreSQL vendor advisories for updates and apply patches once available.
CVE-2026-18024: Buffer Over-read in PostgreSQL
Description
Buffer over-read in PostgreSQL ascii() SQL function allows a user to disclose up to 3 bytes after the end of a specific allocation, via a crafted text value. This is the same class of defect that CVE-2026-2006 fixed, though this instance has less impact. Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected.
CVSS v3.1
Score 4.3medium
Affected software
pkg:deb/postgresql/postgresqlRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a buffer over-read in the ascii() function of PostgreSQL, which can disclose up to 3 bytes of memory beyond the intended allocation when processing a crafted input string. It affects PostgreSQL versions earlier than 14.24, 15.19, 16.15, 17.11, and 18.5. The flaw is a lesser-impact variant of a previously addressed issue (CVE-2026-2006). The vulnerability requires low privileges to exploit and does not impact integrity or availability, only confidentiality to a limited extent.
Potential Impact
An attacker with limited privileges can cause the ascii() function to read and disclose up to 3 bytes of memory beyond the allocated buffer. This could lead to minor information disclosure but does not affect data integrity or system availability. The impact is limited in scope and severity.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided in the current data. Users should monitor PostgreSQL vendor advisories for updates and apply patches once available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- PostgreSQL
- Date Reserved
- 2026-07-28T01:59:49.926Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a7dc619bf8831d5393e5400
Added to database: 08/13/2026, 13:26:49 UTC
Last enriched: 08/13/2026, 13:43:36 UTC
Last updated: 08/13/2026, 23:40:59 UTC
Views: 6
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