PostgreSQL timeofday() can disclose portions of server memory

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Summary

CVECVE-2026-6474
StatePUBLISHED
AssignerPostgreSQL
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-14 14:16:24 UTC
Updated2026-05-18 15:00:45 UTC
DescriptionExternally-controlled format string in PostgreSQL timeofday() function allows an attacker to retrieve portions of server memory, via crafted timezone zones. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.

Risk And Classification

Primary CVSS: v3.1 4.3 MEDIUM from f86ef6dc-4d3a-42ad-8f28-e6d5547a5007

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS: 0.000320000 probability, percentile 0.096430000 (date 2026-05-25)

Problem Types: CWE-134 | CWE-134 Use of Externally-Controlled Format String

VersionSourceTypeScoreSeverityVector
3.1f86ef6dc-4d3a-42ad-8f28-e6d5547a5007Secondary4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
3.1CNACVSS4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Postgresql Postgresql All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na PostgreSQL affected 18 18.4 rpm Not specified
CNA Na PostgreSQL affected 17 17.10 rpm Not specified
CNA Na PostgreSQL affected 16 16.14 rpm Not specified
CNA Na PostgreSQL affected 15 15.18 rpm Not specified
CNA Na PostgreSQL affected 14.23 rpm Not specified

References

ReferenceSourceLinkTags
www.postgresql.org/support/security/CVE-2026-6474 f86ef6dc-4d3a-42ad-8f28-e6d5547a5007 www.postgresql.org Patch, Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: The PostgreSQL project thanks Xint Code for reporting this problem. (en)

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