CVE-2026-92287
Description
A flaw was found in Apache Arrow and PyArrow. When reading encrypted Parquet files configured with a Key Management Service (KMS) client, unvalidated KMS server addresses embedded within the file can be passed directly to the client implementation. An attacker can supply a maliciously crafted Parquet file to trigger the transmission of sensitive authentication tokens to an attacker-controlled server, resulting in information disclosure.
Statement
Red Hat rates the impact of this vulnerability as Moderate because exploitation requires user interaction to process an untrusted encrypted file alongside a specific configuration where KMS endpoint addresses are deferred to file metadata rather than enforced by the application. In typical Red Hat deployments utilizing Arrow or PyArrow, Parquet encryption using custom Key Management Service client plugins without application-managed endpoints is an uncommon, specialized use case. Furthermore, compromise is contingent upon the pluggable client transmitting authentication credentials without independently validating target hosts, limiting the likelihood of widespread exposure.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 4.7 | N/A | 8.1 |
| Attack Vector | Local | N/A | Network |
| Attack Complexity | High | N/A | Low |
| Privileges Required | None | N/A | None |
| User Interaction | Required | N/A | Required |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | High | N/A | High |
| Integrity Impact | None | N/A | High |
| Availability Impact | None | N/A | None |
Vector
Red Hat: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
cve.org: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Understanding the Weakness (CWE)
Confidentiality
Technical Impact: Read Application Data
Integrity
Technical Impact: Execute Unauthorized Code or Commands
Access Control
Technical Impact: Bypass Protection Mechanism
By providing URLs to unexpected hosts or ports, attackers can make it appear that the server is sending the request, possibly bypassing access controls such as firewalls that prevent the attackers from accessing the URLs directly. The server can be used as a proxy to conduct port scanning of hosts in internal networks, use other URLs such as that can access documents on the system (using file://), or use other protocols such as gopher:// or tftp://, which may provide greater control over the contents of requests.
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