CVE-2026-61845
Description
A flaw was found in crass. A remote attacker can cause a Denial of Service (DoS) by submitting specially crafted Cascading Style Sheets (CSS) inputs containing scientific notation with excessively large exponents. Because crass calculates these exponent values without proper limits, processing the input can exhaust system CPU and memory resources, potentially causing the application to crash.
Statement
Red Hat Product Security rates this vulnerability as having an Important severity because unauthenticated remote attackers can trigger high denial-of-service conditions against applications parsing untrusted style declarations without requiring special privileges. In affected Red Hat products, such as 3scale and Satellite, exposure is contingent upon features that accept external style definitions or content processing pipelines utilizing the Crass parser. While the issue does not compromise data confidentiality or integrity, the resulting resource starvation can lead to complete disruption of dependent service operations.
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 | 7.5 | N/A | N/A |
| Attack Vector | Network | N/A | N/A |
| Attack Complexity | Low | N/A | N/A |
| Privileges Required | None | N/A | N/A |
| User Interaction | None | N/A | N/A |
| Scope | Unchanged | N/A | N/A |
| Confidentiality | None | N/A | N/A |
| Integrity Impact | None | N/A | N/A |
| Availability Impact | High | N/A | N/A |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Understanding the Weakness (CWE)
Availability
Technical Impact: DoS: Resource Consumption (CPU); DoS: Resource Consumption (Memory); DoS: Resource Consumption (Other)
When allocating resources without limits, an attacker could prevent other systems, applications, or processes from accessing the same type of resource. It can be easy for an attacker to consume many resources by rapidly making many requests or causing larger resources to be used than is needed.
Frequently Asked Questions
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