HOMEVULNERABILITIESCVE-2026-6478
MEDIUM

CVE-2026-6478

CWE-385Published: May 14, 2026· Updated: May 18, 2026

6.5
CVSS v3.1
EPSS:0.04%probability of exploitation in 30 daysPercentile:11.1th

Official 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.

NVD Source

Technical Analysis

CVE-2026-6478 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Affected Vendors & Products

postgresql1 product
postgresql
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories

PATCHhttps://www.postgresql.org/support/security/CVE-2026-6478/

All References (1)

→
https://www.postgresql.org/support/security/CVE-2026-6478/Patch · Vendor Advisory

Quick Facts

CVE IDCVE-2026-6478
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessCWE-385
CISA KEVNo
EPSS (30d)0.04%
Affected1 vendor
PublishedMay 14, 2026

Related CVEs (CWE-385)

CVE-2026-5598
8.9
CVE-2025-66442
5.1

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-6478 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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