CVE-2026-55769CloudNativePG: Overriding operators can lead to privilege escalation in CloudNativePG for SQL queries without a fixed `search_path`
- 9.4CriticalCVSS base score
- 0.77%Exploitation in 30 daysEPSS · top 44% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- YesPublic exploitsa reference or SSVC says so
Description
CloudNativePG is a platform designed to manage PostgreSQL databases within Kubernetes environments. Prior to 1.28.4 and 1.29.2, CloudNativePG opened superuser connections without pinning search_path in fillDefaultParameters in pkg/management/postgres/pool/profiles.go. A role holding DATABASE OWNER could create overloaded built-in operators in the public schema and change the database or role search_path, causing instance-manager introspection queries such as SELECT COUNT(*) > 0 FROM pg_catalog.pg_extension WHERE extname = $1 to execute attacker-controlled functions as the postgres superuser. The same trust issue affected direct sql.Open("pgx", ...) callsites and the public.user_search SECURITY DEFINER function, enabling PostgreSQL superuser access, operating system command execution through COPY ... FROM PROGRAM, and access to the pod ServiceAccount token. This issue is fixed in versions 1.28.4, 1.29.2, and 1.30.0.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. A reference of the record is tagged as an exploit. CISA's SSVC rates its exploitation: a proof of concept is public.
Show the exploits1
References tagged exploit1 reference
Timeline
ID reserved
By GitHub_M
- 2 months later
· 2 months later
Published
- 1 day later
· 1 day later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 4.0 | Critical9.4 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H |
| NVDNVD · Deferred | 4.0 | Critical9.4 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
- EPSS (exploitation in 30 days)
- 0.77% · top 44% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.4.
Affected products
cloudnative-pg · cloudnative-pg
- affected < 1.28.4
- affected >= 1.29.0, < 1.29.2
References
References8
- https://github.com/cloudnative-pg/cloudnative-pg/security/advisories/GHSA-x8c2-3p4r-v9r6 (opens in a new tab)x_refsource_CONFIRMexploit
- https://github.com/cloudnative-pg/cloudnative-pg/pull/10774 (opens in a new tab)x_refsource_MISC
- https://github.com/cloudnative-pg/cloudnative-pg/commit/02b5c6289b7609dc87fcb1ae9c113160e3d43308 (opens in a new tab)x_refsource_MISC
- https://github.com/cloudnative-pg/cloudnative-pg/commit/db38f4d80315c8f1b21bf511ef0f28871820c14d (opens in a new tab)x_refsource_MISC
- https://github.com/cloudnative-pg/cloudnative-pg/commit/e0e2d53adbd907a61f583b1431904b5969f3fd22 (opens in a new tab)x_refsource_MISC
- https://github.com/cloudnative-pg/cloudnative-pg/releases/tag/v1.28.4 (opens in a new tab)x_refsource_MISC
- https://github.com/cloudnative-pg/cloudnative-pg/releases/tag/v1.29.2 (opens in a new tab)x_refsource_MISC
- https://github.com/cloudnative-pg/cloudnative-pg/releases/tag/v1.30.0 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-63687 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-55769)Record last updated .