CVE-2026-14669Network attack vector

Authenticated code execution via timezone abbreviation overflow

Published Aug 13, 2026 · Updated Aug 13, 2026

Heap overflow in PostgreSQL 14 before 14.24, 15 before 15.19, 16 before 16.15, 17 before 17.11, and 18 before 18.6 allows attackers to execute code. The to_char(timestamptz) TZ formatter copies an attacker-selected, long POSIX timezone abbreviation beyond its heap allocation while producing formatted output. A database role able to choose the session timezone and run the formatting function can corrupt server memory, crash a backend, or execute code as the database service account.

CVSS severity8.8
High
EPSS probability0.68%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap overflow in PostgreSQL 14 before 14.24, 15 before 15.19, 16 before 16.15, 17 before 17.11, and 18 before 18.6 allows attackers to execute code. The to_char(timestamptz) TZ formatter copies an attacker-selected, long POSIX timezone abbreviation beyond its heap allocation while producing formatted output. A database role able to choose the session timezone and run the formatting function can corrupt server memory, crash a backend, or execute code as the database service account.

The record

CVE
CVE-2026-14669
Published
Aug 13, 2026
Updated
Aug 13, 2026
Vendor
PostgreSQL Global Development Group
Product
PostgreSQL
Classifications
CWE-122, T1210
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <14.24
  2. Affected versionversion=15 <15.19
  3. Affected versionversion=16 <16.15
  4. Affected versionversion=17 <17.11
  5. Affected versionversion=18 <18.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

PostgreSQL Global Development Group · PostgreSQLversion=0 <14.24; version=15 <15.19; version=16 <16.15; version=17 <17.11; version=18 <18.5

Published CVSS scores

8.8PostgreSQL Global Development GroupCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
T1210Exploitation of Remote Services

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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