Authenticated pod command execution via unpinned search path
Published Aug 23, 2026 · Updated Aug 23, 2026
Privilege escalation in OnGres StackGres 1.18.8 and earlier allows remote authenticated users to execute pod commands via database objects. The default metrics exporter opens superuser dblink sessions into tenant databases and executes unqualified version() calls without pinning PostgreSQL search_path, allowing a database owner to shadow the function with attacker-controlled code. Database ownership is required; the next Prometheus scrape runs the planted function as the PostgreSQL superuser, enabling COPY TO PROGRAM command execution and read/write access to co-located databases.
Summary
What happened
Privilege escalation in OnGres StackGres 1.18.8 and earlier allows remote authenticated users to execute pod commands via database objects. The default metrics exporter opens superuser dblink sessions into tenant databases and executes unqualified version() calls without pinning PostgreSQL search_path, allowing a database owner to shadow the function with attacker-controlled code. Database ownership is required; the next Prometheus scrape runs the planted function as the PostgreSQL superuser, enabling COPY TO PROGRAM command execution and read/write access to co-located databases.
The record
- CVE
- CVE-2026-78155
- Published
- Aug 23, 2026
- Updated
- Aug 23, 2026
- Vendor
- OnGres
- Product
- StackGres
- Classifications
- CWE-426, T1068, T1059.004
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 23, 2026CVE publishedPublication date reported by the CVE source.
- Aug 23, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=1.18.8
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo