CVE-2026-112898
Description
A flaw was found in Pillow. When processing an image with an empty palette during color quantization, internal stack memory is left uninitialized and emitted into the output image data. An attacker who supplies a crafted palette image can exploit this vulnerability to read uninitialized memory contents from the resulting image file, leading to information disclosure.
Statement
Red Hat rates this vulnerability as Moderate because it is confined to localized memory leakage and cannot be leveraged directly for service interruption or arbitrary code execution. Exploitation requires an application to ingest user-supplied color maps and pass them into quantization routines, then return the generated graphic to the requester. In standard Red Hat product deployments, integrated imaging tasks rarely allow external users to control color quantization palettes, thereby substantially restricting real-world attack vectors.
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).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 5.3 | 5.3 | N/A |
| Attack Vector | Network | Network | N/A |
| Attack Complexity | Low | Low | N/A |
| Privileges Required | None | None | N/A |
| User Interaction | None | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | Low | Low | N/A |
| Integrity Impact | None | None | N/A |
| Availability Impact | None | None | N/A |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
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