CVE-2026-86864Network attack vectorHinoki check available

File overwrite and credential theft via database injection

Published Sep 17, 2026 · Updated Sep 17, 2026

Injection in pgAdmin 4's Backup tool before 9.18 allows remote authenticated users to overwrite files and steal database credentials. The Backup handler appends the unvalidated database field to pg_dump arguments, allowing injected options to override the output path and libpq connection strings to redirect the connection with the stored password. Exploitation requires tools_backup permission, granted to the default User role, and a connected server; writes remain limited to the pgAdmin operating-system account's permissions, and direct code execution is not demonstrated.

CVSS severity8.7
High
EPSS probability0.58%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Injection in pgAdmin 4's Backup tool before 9.18 allows remote authenticated users to overwrite files and steal database credentials. The Backup handler appends the unvalidated database field to pg_dump arguments, allowing injected options to override the output path and libpq connection strings to redirect the connection with the stored password. Exploitation requires tools_backup permission, granted to the default User role, and a connected server; writes remain limited to the pgAdmin operating-system account's permissions, and direct code execution is not demonstrated.

The record

CVE
CVE-2026-86864
Published
Sep 17, 2026
Updated
Sep 17, 2026
Vendor
pgAdmin Development Team
Product
pgAdmin 4
Classifications
CWE-22, CWE-88, T1555
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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 <9.18

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

pgAdmin Development Team · pgAdmin 4version=0 <9.18

Published CVSS scores

8.8PostgreSQL CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.7PostgreSQL CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-88Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
T1555Credentials from Password Stores

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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