CVE-2026-96883: Type confusion in AWS pgcollection allows remote code execution

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-24 · updated 2026-09-25
Weakness: CWE-843

Description

pgcollection is an open source extension to PostgreSQL. A type confusion issue in AWS pgcollection 2.0.0 through 2.1.1 might allow an authenticated remote user to execute arbitrary code as the postgres operating system user via crafted SQL statements that rely on mismatched type metadata in collection value retrieval and array conversion functions. To remediate this issue, users should upgrade to version 2.1.2 or later.

Affected products

AWS pgcollection: from 2.0.0 through 2.1.1

References

https://aws.amazon.com/security/security-bulletins/2026-118-aws/
https://github.com/aws/pgcollection/releases/tag/v2.1.2
https://github.com/aws/pgcollection/security/advisories/GHSA-g539-cj32-hv6r

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