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CVE-2026-6638

ℹī¸ low
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Summary

SQL injection in PostgreSQL logical replication ALTER SUBSCRIPTION ... REFRESH PUBLICATION allows a subscriber table creator to execute arbitrary SQL with the subscription's publication-side credentials. The attack takes effect at the next REFRESH PUBLICATION. Within major versions 16, 17, and 18, minor versions before PostgreSQL 18.4, 17.10, and 16.14 are affected. Versions before PostgreSQL 16 are unaffected.

CVSS Score
3.7
Low
EPSS Score
0.0
Exploit Probability
Published Date
2026-05-14
First Seen: 2026-05-17
📊 Relative Risk Intelligence

This CVE is Lower Risk - more severe than 3.9% of all 342,933 vulnerabilities in our database.

#329,490
Below average severity
Severity Percentile
đŸŽ¯ CISA SSVC Assessment Updated: May 14, 2026
🔍 Exploitation Status
None
No known exploits
⚙ī¸ Automatable
NO
Requires human interaction
đŸ’Ĩ Technical Impact
Partial
Limited system impact
🏆 Discovered By
The PostgreSQL project thanks Pavel Kohout, Aisle Research 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:H/PR:L/UI:R/S:U/C:L/I:L/A:N
CWE IDs (Weakness Types)
CWE-89

đŸ“Ļ Affected Products 3

Vendor Product Status Affected Versions
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 đŸ”ļ 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-2026-6473 ⚠ī¸ high 8.8 1.0 Integer wraparound in multiple PostgreSQL server features allows an unprivileged database user to cause the server to un... 2026-05-14
CVE-2026-6474 đŸ”ļ 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 ⚠ī¸ 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 ⚠ī¸ 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 ⚠ī¸ high 8.8 0.5 Use of inherently dangerous function PQfn(..., result_is_int=0, ...) in PostgreSQL libpq lo_export(), lo_read(), lo_lsee... 2026-05-14
These CVEs affect the same products