CVE-2026-41256
Description
A flaw was found in jq, a command line JSON processor. Top-level jq programs loaded from a file using the -f flag are truncated at the first embedded NUL byte. This issue allows an attacker who can supply a crafted filter file to prematurely truncate the program, potentially bypassing filtering logic and modifying the integrity of the processed data.
Statement
To exploit this flaw, an attacker needs to supply a crafted filter file containing an embedded NUL byte to be loaded by jq using the -f flag. This allows the attacker to prematurely truncate the program, potentially bypassing intended filtering logic and modifying the integrity of the processed data. Due to these reasons, this issue has been rated with a moderate severity.
Mitigation
Do not process untrusted filter files using the -f flag with the jq command line JSON processor.
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 | 5.5 | N/A | 5.5 |
| Attack Vector | Local | N/A | Local |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | None | N/A | None |
| User Interaction | Required | N/A | Required |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | None | N/A | None |
| Integrity Impact | High | N/A | High |
| Availability Impact | None | N/A | None |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
cve.org: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Understanding the Weakness (CWE)
Integrity
Technical Impact: Unexpected State
Frequently Asked Questions
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