PT-2026-26292 · Pgproto3+1 · Pgproto3+1

Athuljayaram · Published 2026-01-01 · Updated 2026-05-04 · CVE-2026-4427

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions pgproto3 (affected versions not specified)

Description A flaw exists in pgproto3 where a malicious or compromised PostgreSQL server can send a DataRow message containing a negative field length. This input validation issue can cause a denial of service (DoS) due to a slice bounds out of range panic.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Improper Validation of Array Index

Weakness Enumeration

CWE-129

Related Identifiers

CLEANSTART-2026-PW57640

CVE-2026-4427

GHSA-X6GF-MPR2-68H6

OPENSUSE-SU-2026:10669-1

OPENSUSE-SU-2026:10684-1

RHSA-2026:22450

RHSA-2026:22714

Affected Products

Rocky Linux

Pgproto3

References · 65

• https://nvd.nist.gov/vuln/detail/CVE-2026-1229 · Security Note
• https://osv.dev/vulnerability/openSUSE-SU-2026:10684-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-33186 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-4427 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-27142 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-68121 · Security Note
• https://osv.dev/vulnerability/GHSA-x6gf-mpr2-68h6 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-4427 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-61732 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-61730 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-25679 · Security Note
• https://cve.org/CVERecord?id=CVE-2026-4427 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-25934 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-68119 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-26958 · Security Note