CVE-2026-85062
Description
A flaw was found in Colord, a tool for color manipulations. A remote attacker can supply a specially crafted, oversized color string to the affected component. This can cause the processing thread to block, leading to a denial of service (DoS) for the application using Colord.
Statement
A regular expression denial of service (ReDoS) flaw was found in the colord npm package. The synchronous CSS color string matchers in colord use ambiguous regular expressions that exhibit quadratic backtracking when processing malformed input. An attacker who can supply unbounded color strings to the library's parsing functions (such as colord(), getFormat(), isEqual(), mix(), or contrast()) may temporarily block the processing thread. However, exploitation requires multi-kilobyte payloads to cause a noticeable stall (64 KB for a ~4 second delay), and the growth is polynomial (quadratic), not exponential. Note: The RHEL RPM packages named "colord" (hughsie/colord) are a completely different C-based color management daemon and are not affected by this vulnerability. Only the npm package "colord" (omgovich/colord) is affected. This issue is fixed in version 2.9.4.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
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 | 5.3 | 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 | Low | 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:L
Understanding the Weakness (CWE)
Availability
Technical Impact: DoS: Resource Consumption (CPU)
Attackers can create crafted inputs that intentionally cause the regular expression to use excessive backtracking in a way that causes the CPU consumption to spike.
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