CVE-2026-96637
Description
A flaw was found in Pillow. When processing multi-frame SPIDER images, decompression bomb safeguards are not reapplied when navigating to subsequent frames that declare excessively large dimensions. A remote attacker could exploit this vulnerability by providing a specially crafted image file, leading to excessive memory consumption and a Denial of Service (DoS).
Statement
Red Hat has evaluated this vulnerability as having a Moderate severity impact because exploitation requires an application to parse multi-frame SPIDER image files and advance through secondary frames, limiting the consequence to memory exhaustion and denial of service without compromising confidentiality or integrity. The SPIDER image format is specialized and not typically accepted or processed by general enterprise workloads or default service configurations. Consequently, typical deployments remain unaffected unless custom application workflows explicitly ingest and iterate through untrusted multi-frame SPIDER datasets.
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 | 6.5 | 6.5 | N/A |
| Attack Vector | Network | Network | N/A |
| Attack Complexity | Low | Low | N/A |
| Privileges Required | None | None | N/A |
| User Interaction | Required | Required | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | None | None | N/A |
| Integrity Impact | None | None | N/A |
| Availability Impact | High | High | N/A |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Understanding the Weakness (CWE)
Availability
Technical Impact: DoS: Amplification; DoS: Crash, Exit, or Restart; DoS: Resource Consumption (CPU); DoS: Resource Consumption (Memory)
System resources, CPU and memory, can be quickly consumed. This can lead to poor system performance or system crash.
Frequently Asked Questions
Not sure what something means? Check out our Security Glossary.
Want to get errata notifications? Sign up here.
