Copyright © 2012 Red Hat, Inc. All rights reserved. Moderate 2026-06-25T17:17:46 jq: jq: Heap out-of-bounds write via oversized raw file processing 6.6 CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:H CWE-787

jq is a command-line JSON processor. Prior to 1.8.2,` jq --rawfile` can turn a handled oversized-string error into invalid-state reuse and a real heap out-of-bounds write in assertion-disabled builds. When jv_load_file(raw=1) reads an attacker-controlled file, it repeatedly appends file chunks to the same jv string accumulator. Once jv_string_append_buf() returns jv_invalid_with_msg("String too long"), the raw-file loop does not stop. If the file contains at least one more byte, the next loop iteration appends a new chunk to an object that is already invalid. With assertions enabled this aborts in jvp_string_ptr(). With assertions disabled, the invalid object is interpreted as a string object and ASan reports heap-buffer-overflow. This vulnerability is fixed in 1.8.2.

A flaw was found in jq, a command-line JSON processor. This vulnerability allows an attacker to trigger a heap out-of-bounds write by providing a specially crafted, oversized file to the `jq --rawfile` option. This can lead to a denial of service (DoS), making the affected system or application unavailable, and may also impact data integrity. Exploitation requires user interaction, as a user must process the malicious file.

A flaw was found in jq, a command-line JSON processor. When using the `--rawfile` option to process an oversized file, jq can trigger a heap out-of-bounds write in assertion-disabled builds (typical for release builds). Exploitation requires a local user to explicitly process an attacker-controlled file. With assertions enabled, the process aborts instead of corrupting memory. Avoid using `jq --rawfile` with untrusted or user-controlled files. Red Hat Hardened Images 2026-06-25T00:00:00Z RHSA-2026:29986 jq-main-1.8.2-0.1.hum1 Red Hat Ansible Automation Platform 2 Fix deferred ansible-automation-platform-26/controller-rhel9 Red Hat Ansible Automation Platform 2 Fix deferred ansible-automation-platform-26/hub-rhel9 Red Hat Ansible Automation Platform 2 Fix deferred ansible-automation-platform-27/controller-rhel9 Red Hat Ansible Automation Platform 2 Fix deferred ansible-automation-platform-27/hub-rhel9 Red Hat Ansible Automation Platform 2 Fix deferred automation-controller Red Hat Ceph Storage 4 Fix deferred jq Red Hat Enterprise Linux 10 Fix deferred jq Red Hat Enterprise Linux 8 Fix deferred jq Red Hat Enterprise Linux 9 Fix deferred jq Red Hat OpenShift Container Platform 4 Fix deferred rhcos https://www.cve.org/CVERecord?id=CVE-2026-49839 https://nvd.nist.gov/vuln/detail/CVE-2026-49839 https://github.com/jqlang/jq/security/advisories/GHSA-cfh2-vwfq-qfmm