CVE Tools
Sign in

CVE-2026-6478

PostgreSQL discloses MD5-hashed passwords via covert timing channel

Published: May 14, 2026Updated: Aug 3, 2026 Sources: CVE List NVD BDUCWE-385
6.5MEDIUM
NVD MITRE
EPSS Score
0.6%
Top 56.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

Covert timing channel in comparison of MD5-hashed password in PostgreSQL authentication allows an attacker to recover user credentials sufficient to authenticate. This does not affect scram-sha-256 passwords, the default in all supported releases. However, current databases may have MD5-hashed passwords originating in upgrades from PostgreSQL 13 or earlier. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-385

Affected Products

Novell Inc.
commercial·US
SUSE Linux Enterprise Server for SAP ApplicationsOn-premOS
Operating Systems / linux-distro
Suse Linux Enterprise DesktopOn-premOS
Operating Systems / linux-distro
SUSE Manager ProxyOn-prem
Operating Systems / linux-distro
Сообщество свободного программного обеспечения
oss-projectaka fsf
Debian GNU/LinuxOn-premOS
Operating Systems / linux-distro
АО «ИВК»
commercial·RUaka ivk
АЛЬТ СП 10On-premOS
Operating Systems / linux-distro
Postgres Professional
commercialaka postgres pro enterprise, postgres pro certified
Postgres Pro CertifiedOn-premDatabase
Databases / relational
PostgreSQL Global Development Group
oss-project·USaka postgresql
PostgreSQLOn-premDatabase
Databases / relational
АО «СберТех»
commercial·RUaka ao sbertech, сбертех
СУБД «Platform V Pangolin DB»On-premDatabase
Databases / relational
and 4 more affected products View all →

Exploitability

Official Patch Available
Workaround Available
Is your org exposed to CVE-2026-6478?We can run the check for you — a free external exposure review, no install. Check my exposure

References

https://www.postgresql.org/support/security/CVE-2026-6478/
postgresql.org
https://www.postgresql.org/support/security/CVE-2026-6478/
postgresql.org
https://www.postgresql.org/about/news/postgresql-184-1710-1614-1518-and-1423-released-3297/
postgresql.org
and 44 more references View all →

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2026-6478 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows