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CVE-2026-6473

⚠️ high
🔍 Scan for this CVE
Summary

Integer wraparound in multiple PostgreSQL server features allows an unprivileged database user to cause the server to undersize an allocation and write out-of-bounds. This may execute arbitrary code as the operating system user running the database. In applications that pass gigabyte-scale user inputs to the relevant database functions, the application input provider may achieve a segmentation fault. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.

CVSS Score
8.8
High
EPSS Score
0.1
Exploit Probability
Published Date
2026-05-14
First Seen: 2026-05-17
📊 Relative Risk Intelligence

This CVE is High Risk - more severe than 81.1% of all 328,009 vulnerabilities in our database.

#62,016
Top 25% most severe
Severity Percentile
🎯 CISA SSVC Assessment Updated: May 14, 2026
🔍 Exploitation Status
None
No known exploits
⚙️ Automatable
NO
Requires human interaction
💥 Technical Impact
Total
Complete system compromise possible
🏆 Discovered By
The PostgreSQL project thanks Anemone, A1ex, Xint Code, Jihe Wang, Jingzhou Fu, Pavel Kohout, Petr Simecek, www.aisle.com, Bruce Dang of Calif.io, and Sven Klemm for reporting this problem.
SSVC data provided by CISA
Last Modified 2026-05-18
Source NVD 🔗
CVSS Vector 3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE IDs (Weakness Types)
CWE-190

📦 Affected Products 5

Vendor Product Status Affected Versions
postgresql postgresql Affected
< 14.23
postgresql postgresql Affected
> 15.0 < 15.18
postgresql postgresql Affected
> 16.0 < 16.14
postgresql postgresql Affected
> 17.0 < 17.10
postgresql postgresql Affected
> 18.0 < 18.4

🔗 References 1

https://www.postgresql.org/support/security/CVE-2026...
Patch Vendor Advisory

🔗 Related CVEs 6

CVE ID Severity CVSS EPSS Summary Published
CVE-2026-6472 🔶 medium 5.4 0.0 Missing authorization in PostgreSQL CREATE TYPE allows an object creator to hijack other queries that use search_path to... 2026-05-14
CVE-2026-6474 🔶 medium 4.3 0.0 Externally-controlled format string in PostgreSQL timeofday() function allows an attacker to retrieve portions of server... 2026-05-14
CVE-2026-6475 ⚠️ high 8.8 0.1 Symlink following in PostgreSQL pg_basebackup plain format and in pg_rewind allows an origin superuser to overwrite loca... 2026-05-14
CVE-2026-6476 ⚠️ high 7.2 0.0 SQL injection in PostgreSQL pg_createsubscriber allows an attacker with pg_create_subscription rights to execute arbitra... 2026-05-14
CVE-2026-6477 ⚠️ high 8.8 0.1 Use of inherently dangerous function PQfn(..., result_is_int=0, ...) in PostgreSQL libpq lo_export(), lo_read(), lo_lsee... 2026-05-14
CVE-2026-6478 🔶 medium 6.5 0.1 Covert timing channel in comparison of MD5-hashed password in PostgreSQL authentication allows an attacker to recover us... 2026-05-14
These CVEs affect the same products