CVE-2026-120217
Description
A flaw was found in loguru. An inefficient regular expression in the ANSI color-markup parser can lead to a Denial of Service (DoS). A remote attacker can exploit this vulnerability by submitting specially crafted input to the ANSI color-markup parser's AnsiParser.feed function, triggering excessive regular expression backtracking and consuming high processor resources. This issue causes the application to become unresponsive to legitimate requests.
Statement
Red Hat has evaluated this vulnerability as having a Moderate impact because exploitation causes a localized denial of service via excessive CPU consumption without compromising system confidentiality or data integrity. Within Red Hat OpenShift AI and Red Hat Enterprise Linux AI container environments, the affected logging library is utilized by underlying machine learning and inference components. Successful exploitation requires an application to pass malicious, user-controlled input directly into the terminal color markup parser, limiting the blast radius under standard deployment configurations.
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 | 4.3 | N/A | 4.3 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | Low | N/A | Low |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | None | N/A | None |
| Integrity Impact | None | N/A | None |
| Availability Impact | Low | N/A | Low |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
cve.org: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RC:C
Frequently Asked Questions
Not sure what something means? Check out our Security Glossary.
Want to get errata notifications? Sign up here.
