CVE-2026-2003 | PostgreSQL oidvector discloses a few bytes of memory

Improper validation of type "oidvector" in PostgreSQL allows a database user to disclose a few bytes of server memory. We have not ruled out viability of attacks that arrange for presence of confidential information in disclosed bytes, but they seem unlikely. Versions before PostgreSQL 18.2, 17.8, 16.12, 15.16, and 14.21 are affected.

Published: 2026-02-12 Last update: 2026-02-20 Assigner: f86ef6dc-4d3a-42ad-8f28-e6d5547a5007 Source: f86ef6dc-4d3a-42ad-8f28-e6d5547a5007
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-2003 is rated Low Risk (18.8/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.02%). Low composite risk—no urgent action required; patch on your normal maintenance cycle and revisit priority if CVSS or EPSS increases.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-2003

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-03-21 0.06% 0.02% -0.04%
2 2026-03-16 0.04% 0.06% +0.02%
3 2026-02-13 — 0.04% —

Full EPSS history (3 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-2003

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 2.8 1.4 f86ef6dc-4d3a-42ad-8f28-e6d5547a5007

Weakness enumeration for CVE-2026-2003

OS Trackers for CVE-2026-2003

vendor priority summary link
alpine — CVE-2026-2003: 5 source package rows (postgresql, postgresql15, postgresql16, postgresql17, postgresql18); 12 state rows across 7 repos (3.20-main, 3.21-main, 3.22-main, 3.23-community, 3.23-main, edge-community, edge-main); fixed 11, open 1. https://security.alpinelinux.org/vuln/CVE-2026-2003
debian not yet assigned CVE-2026-2003 not yet assigned priority: Debian including 4 source packages (postgresql-13, postgresql-15, postgresql-17, postgresql-18), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2026-2003
redhat medium — https://access.redhat.com/security/cve/CVE-2026-2003
suse medium CVE-2026-2003 severity moderate: SUSE including 346 source package names (2.2.1-5.40:grub2-2.12-slfo.1.1_2.1, 2.2.1-5.40:grub2-i386-pc-2.12-slfo.1.1_2.1, …), 1251 product×package rows across 73 product lines (Container suse/manager/5.0/x86_64/server, Container suse/manager/5.0/x86_64/server-migration-14-16, … (73 product lines)): Fixed 1204, First Fixed 47. https://www.suse.com/security/cve/CVE-2026-2003/
ubuntu medium CVE-2026-2003 medium priority: Ubuntu including 8 source packages (postgresql-10, postgresql-12, …), 36 status rows across 8 suites (bionic, focal, jammy, noble, questing, trusty, upstream, xenial): DNE 21, needs-triage 7, ignored 4, released 3, deferred 1. https://ubuntu.com/security/CVE-2026-2003

Affected software / configurations for CVE-2026-2003

Vendor Product Version Raw CPE
postgresql postgresql >= 14.0, < 14.21 cpe:2.3:a:postgresql:postgresql:*:*:*:*:*:*:*:*
postgresql postgresql >= 15.0, < 15.16 cpe:2.3:a:postgresql:postgresql:*:*:*:*:*:*:*:*
postgresql postgresql >= 16.0, < 16.12 cpe:2.3:a:postgresql:postgresql:*:*:*:*:*:*:*:*
postgresql postgresql >= 17.0, < 17.8 cpe:2.3:a:postgresql:postgresql:*:*:*:*:*:*:*:*
postgresql postgresql >= 18.0, < 18.2 cpe:2.3:a:postgresql:postgresql:*:*:*:*:*:*:*:*

References for CVE-2026-2003

cvelogic Threat Intelligence