How severe is CVE-2026-78155?

CVE-2026-78155 has a CVSS 3.x base score of 9.9, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-78155 being actively exploited?

It is not currently listed in CISA's Known Exploited Vulnerabilities catalog, and no EPSS exploit-prediction score is available yet.

How do I fix CVE-2026-78155?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2026-78155 published?

CVE-2026-78155 was published on 2026-08-23.

CVE-2026-78155

CVE-2026-78155 is a critical-severity vulnerability with a CVSS 3.x base score of 9.9. The underlying weakness is classified as CWE-426.

Key facts

Severity: Critical (CVSS 3.x base score 9.9)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-426
Published: 2026-08-23
Last modified: 2026-08-23

Description

privilege escalation in StackGres operator allows a low-privilege tenant who owns a database to gain administrator privileges

Frequently asked questions

What is CVE-2026-78155?: privilege escalation in StackGres operator allows a low-privilege tenant who owns a database to gain administrator privileges
How severe is CVE-2026-78155?: CVE-2026-78155 has a CVSS 3.x base score of 9.9, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-78155 being actively exploited?: It is not currently listed in CISA's Known Exploited Vulnerabilities catalog, and no EPSS exploit-prediction score is available yet.
How do I fix CVE-2026-78155?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2026-78155 published?: CVE-2026-78155 was published on 2026-08-23.

References

https://gitlab.com/ongresinc/stackgres/-/work_items/3177

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